The freezing point of the solution can be calculated as 0.6 9.
What is freezing point?Freezing point is the temperature at which a liquid turns into a solid. At the freezing point, the molecules of the liquid have lost enough kinetic energy that they can no longer move freely and they will form a crystal lattice structure. The freezing point of a substance is determined by the pressure of the liquid.
The freezing point of a solution is determined by a colligative property known as freezing point depression. This property states that when a solute is dissolved in a solvent, the freezing point of the solution is lower than that of the pure solvent.
The freezing point depression of an aqueous solution containing 17 g of C2H5OH in 1000 g of water can be calculated using the formula:
T f = K f * m
where T f is the freezing point of the solution, K f is the freezing point depression constant for water (1.86 km -1), and m is the molar concentration of the solution (mass of solute / mass of solvent).
Since the mass of C2H5OH is 17g, the molar mass is 46 g/mol, and the mass of water is 1000 g, the molar concentration can be calculated as:
m = (17 g / 46 g/mol) / (1000g) = 0.370 mol / kg
Thus, the freezing point of the solution can be calculated as:
T f = 1.86 km -1 * 0.370 mol/kg = 0.69.
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What is the percentage of oxygen in AgNO3?
28% is the percentage of oxygen in AgNO₃ by mass.
What is percentage by mass?Mass percent is a way of expressing concentration or describing a component in a particular mixture. The composition of a solution can be expressed in mass percent and indicates the mass of solute present in a given mass of solution. The amount of solute is expressed in mass or moles. This formula helps indicate the minimum number of moles and the relative number of atoms of each element in the compound. With the help of molecular formulas, chemists can also calculate the actual molecular formula. This formula gives the exact number of atoms in the compound.
To calculate the mass percent of an element in a compound, divide the mass of the element in 1 mole of the compound by the molar mass of the compound and multiply the result by 100.
Given,
Molecular mass of AgNO₃ = 169.87 g/mol
Molecular mass of O in AgNO₃ = 16 × 3
= 48 g/mol
% of oxygen in AgNO₃ = (48/169.87) × 100
= 0.28 × 100
= 28%
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Derive Equation 3 from Equation 1:
Equation 3: ΔE= hc/λ = hcR(1/n2 - 1/n2h )
Equation 1: 1/λ= R(1/n2-1/n2h)
equation 1 1/λ =R(1/n2-1/n2h)
∴ λ =(n2-1)n2h /R
substute this value in equation 3
ΔE = hc/(n2-1)n2h/R
∴ΔE = hcR( 1/n2 -1/n2h )
∆E is the internal energy change, and n is the number of gaseous products, gaseous reactants, or moles. The change in a system's internal energy is the sum of the heat is transferred and the work done. The heat flow is equivalent to the change in the system's internal energy plus the PV work done. Internal energy (U) is defined in chemistry and physics as the amount of energy of a closed system. Internal system is the energy of the system's potential energy and kinetic energy. Furthermore, the transformation in a system's internal energy equals the sum of heat transferred and work done.
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What are Group 3 elements called?
Group III is divided into the groups IIIb and IIIa. Scandium, yttrium, and lanthanum, which are typically grouped with the lanthanoids, as well as actinium, which is grouped with the actinoids, make up Group IIIa.
What is the name of Group 4 elements?The periodic table's second group of transition metals is Group 4. It includes the four elements rutherfordium (Ru), zirconium (Zr), hafnium (Hf), and titanium (Ti) (Rf). In honor of its lightest member, the group is sometimes known as the titanium group or titanium family.
What are the three elemental groups?Metals, nonmetals, and metalloids are the Periodic Table's three main groups. Each group's constituent elements share comparable physical and chemical characteristics.
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Suppose a friend challenges you to separate a mixture of wood shavings, iron filings, sand, and sugar. The image shows the mixture of the four items. Think about the components of the mixture. Consider how the unique properties of each component might suggest a method you can use to separate it from the rest of the mixture. 1. What tools do you think you could use to separate the mixture into its components? Explain your reasoning.
There are two types of mixture, one is homogeneous mixture and other is heterogeneous mixture. Therefore, the term best describes 10-karat gold is homogeneous mixture. Therefore, in below given ways mixture can be separated out.
What is mixture?When two or more compounds are combined but each ingredient retains its chemical identity, the result is referred to as a mixture. In other words, there is no chemical interaction between the parts of a combination. According to how consistent they are and how well the components' particle sizes match up, mixtures are categorized.
Iron filings can be separated by keeping the magnet near the fillings. The wood shavings could be separated by dissolving the polystyrene with a solvent. Add water to the mixture of sand and sugar. Sugar will dissolve in water and sand will settle down. Sugar can be separated by evaporation.
Therefore, in above ways mixture can be separated out.
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How do you calculate the average root-mean-square speed?
To calculate the root mean square velocity, we need to find the squares of all the velocities, sum of those values and then divide by the number of molecules.
What is RMS velocity?Root mean square (RMS) speed is the square base of the amount of the squares of the stack speed values separated by the quantity of values. RMS speed is the speed of a wave going through underground developments at various span speeds along a given beam way.
For flat or somewhat slanted layers, NMO and stacking speed are equivalent to RMS speed. Notwithstanding, in regions with enormous horizontal speed varieties, the stack speed contrasts essentially from the RMS speed.
Conduction is the minuscule temperature angle of the root-mean-square speed of issue. This substance can be either strong, fluid, or gas.
To ascertain the root mean square speed, we want to track down the squares of the multitude of speeds, amount of those qualities and afterward partition by the quantity of atoms.
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Which component is released from the active site of an enzyme during a chemical reaction?reactantproductsubstrateprotein.
The component released from the active site of an enzyme during a chemical reaction is known as: a product.
What is the importance of an enzyme and how does it work?Enzymes can facilitate biochemical reactions in our bodies by acting as a catalyst. With enzyme helps, the reactions inside our bodies happen more quickly and more efficiently, as they lower the activation energy of those reactions.
The reactants (known as substrates) bind with an enzyme's active site. This substance breaks the reactants into a new product. The enzyme will release the product when it is ready. So, the correct answer to the question is: product.
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How many moles of water are produced when 7 moles of hydrogen gas react with 3 moles of oxygen gas?
2H2 + O2 → 2H2O
A) 2 moles of water
B) 3 moles of water
C) 5 moles of water
D) 6 moles of water
Answer: 5 moles of water
Explanation:
took the test
When 7 moles of hydrogen react with 3 moles of oxygen, 6 moles of water are produced according to balanced equation. The correct answer is D) 6 moles of water.
2H₂ + O₂ → 2H₂O
2 moles of hydrogen gas react with 1 mole of oxygen gas to produce 2 moles of water.
hydrogen gas to produce 7moles × [tex]\frac{2 moles water}{2moles hydrogen}[/tex] =7moles water.
oxygen gas to produce 3 moles × [tex]\frac{2 moles of water}{1 mole oxygen}[/tex]=6moles water.
7 moles of hydrogen and 3 moles of oxygen are required to produce 7 moles of water while 6 moles of water are produced by 3 moles of oxygen. Due to the availability of oxygen the law of limiting reactants requires that a smaller amount of product 6 moles be produced.
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Who became wife of Cupid?
Instead, Cupid fell in love with Psyche and married her just on condition that she would never see him face.
At what point did Cupid find love?Venus, a goddess of love, is the mother of Cupid in Roman mythology.He was the son to Aphrodite and was known by the Greek name Eros.In spite of his mother's jealousy over Psyche's beauty, Cupid reportedly fell deeply in love with her.
Has Cupid ever dated someone?According to one story, Cupid had a partner by the name of Psyche who lived a very lonely existence because no other women liked her and no male gods were interested in her until she found Eros.
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Match the relational phrases to the corresponding concepts. Zwitterion Isoelectric point Titration COO | HN-C-H 1 CH, .. рк. pH Henderson- Hasselbalch equation OH Serine Hydrogen atom Answer Bank exemplified by measurement of dependent variable of Describes relationship between revealed by net electric charge is zero inflection point
The pH at which the amino acid is neutral is called its isoelectric point. The neutral structure of the amino acid is called Zwitter ion.The pH of a buffer solution is determined using Henderson -Hasselbalch equation. The side chain in the amino acid serine is OH group.
What are amino acids?Amino acids are the building blocks of proteins. There are 20 amino acids found in human. In which essential amino acids are amino acids that have to be uptaken through diet. Non -essential amino acids are in built in our body.
The pH at which the amino acid is neutral is called its isoelectric point. The neutral structure of the amino acid is called Zwitter ion.The pH of a buffer solution is determined using Henderson -Hasselbalch equation.
Each amino acids have different side chains on them and based on it their characteristics changes.The side chain in the amino acid serine is OH group.
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When did pewter have lead?
At least 2,000 years ago, during the Roman era, pewter was used. The basic ingredients of old pewter were 70% tin and 30% lead. This form of pewter, also referred to as black metal, rapidly lost its lead when exposed to acidic foods.
Pewter stopped using lead when?Older pewters with a higher lead concentration are heavier, tarnish more quickly, and turn a darker shade of silver-grey with time. In 1974, BS5140, which was strengthened in 1994 by the European directive BSEN611, eliminated lead from the composition.
Lead content in antique pewter?Modern pewter is lead-free and safe to use for eating and drinking, however older antique pewter objects may have lead residues.
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How many grams of KCl remain in solution at 20 ∘ C?
The amount of KCl that will remain in solution at 20° C depends on the concentration of the solution and the solubility of KCl at that temperature.
What is solubility?Solubility is the ability of a substance to dissolve in a solvent, such as water or alcohol. It is affected by temperature, pressure, and the presence of other substances. Solubility is a physical property of a substance, and it is an important factor in determining the dissolution rate of a chemical in a given solvent. In general, solubility increases as temperature increases, and solubility decreases as pressure increases. Some substances, such as salt, are more soluble in hot water than in cold water. Other substances, such as sugar, are more soluble in cold water than in hot water. Solubility is also affected by the presence of other substances, such as salts, acids, and bases.
The solubility of KCl at 20° C is approximately 55.8 grams per 100 milliliters of water. Therefore, if the solution has a concentration of 1 gram per 100 milliliters of water, then 55.8 grams of KCl will remain in the solution at 20° C.
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What are the 8 properties of logarithms?
Explain rutherford's model of atom
Ernest Rutherford suggested the Rutherford Atomic Model, often known as the Rutherford Model, as a nuclear atom or planetary model of the atom in 1911.
What is Rutherford's model supposed to explain?Rutherford's model was unable to explain why atoms are stable. The charged particles known as electrons should ultimately run out of energy and collide with the nucleus if they are continuously rotating around it.
According to the idea, an atom has a tiny, compact, positively charged center called a nucleus, where almost all of the mass is concentrated, while light, negatively charged particles called electrons orbit far around it, much like planets orbit the Sun.
The majority of the atom's space is vacant, according to three key findings of the experiment.
The nucleus is a very small region inside the atom where all the positive charges are gathered.
In comparison to the size of the atom, the size of the nucleus is extremely small.
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Determine whether a shoe would be chiral or achiral.
A) chiral
B) achiral
C) cannot be determined
A shoe would be chiral as not superimposable on its mirror image. There is left and right side of the shoe. So, when placed in front of the mirror the left will look like the right shoe.
The Greek word cheir, which meaning hand, is where the word chiral comes from. If a molecule or ion cannot be superimposed on its mirror counterpart, it is said to be chiral.
A plane of symmetry or a center of symmetry are absent from chiral compounds. Two stereoisomers of chiral molecules—commonly referred to as enantiomers since they cannot be superimposed mirror images of one another—exist. Based on the absolute configuration, enantiomers are divided into "right-handed" and "left-handed" categories.
The opposite of chiral is achiral. If a molecule or ion may be superimposed on its mirror counterpart, it is said to be achiral. They either have a symmetry plane or a symmetry center.
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How many gram of olid alumnuim ulfied can be prepared by the reaction of 10. 0 gram of alumnium and 15. 0 gram of ulfur?how much of the non limiting
reactant in exce?
The mass of [tex]Al_{2} S_{3}[/tex] produced is 15.616 grams.
The reaction taking place is as follows:
[tex]2Al+ 3S[/tex] →[tex]Al_{2} S_{3} (s)[/tex]
Moles of Al = mass/molar mass = 10.0g/27.0g/mol
= 0.370 mol
Moles of S = mass/molar mass = 15.0g/(32.065g/mol)
= 0.468 mol
Al and S reacts in the molar ratio of 2:3.
2 moles of Al reacts with 3 moles of S
0.370 moles of Al will react with S = (3/2)*0.370mol
= 0.555 mol
Similarly, 0.468 moles of S will react with Al = 2/3 *0.468mol
= 0.312 mol
Thus, Al is in excess and S is the limiting reactant (some of Al will be left over ,S will completely react)
So, moles of [tex]Al_{2} S_{3}[/tex] produced=1/3*0.312 mol of S
= 0.104 mol
Mass of [tex]Al_{2} S_{3}[/tex] produced = moles*molar mass of [tex]Al_{2} S_{3}[/tex]
= 0.104mol*150.158g/mol
= 15.616 grams
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Classify the following as intensive or extensive properties of copper.
The properties of copper are:
1. Color - Extensive 2. Melting Point - Intensive1. Color is an extensive property of copper because it is determined by the amount of copper present. For example, when a large amount of copper is present, the color of the material will be a darker shade.
2. Melting point is an intensive property of copper because it is determined by the chemical structure of the material and is not affected by the amount of copper present. The melting point of copper is 1084.62°C regardless of the amount of copper present.
What is extensive properties?Extensive properties are physical characteristics of a substance that depend on the amount of the material present. Examples of extensive properties include mass, volume, and length.
What is intensive properties?Intensive properties are physical characteristics of a substance that are independent of the amount of the material present. Examples of intensive properties include density, boiling point, and melting point.
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What happens in oxidation reaction?
as the number of bonds between two carbon atoms increases, which one of the following decreases? select one: a. number of electrons between the carbon atoms b. bond energy
As the number of bonds between two carbon atoms increases, the bond length decreases. (Option C)
In molecular geometry, bond length refers to the average distance between nuclei of two bonded atoms in a molecule. It is defined as a transferable property of a bond between atoms of fixed types, relatively independent of the rest of the molecule. The length of the bond is determined by the number of bonded electrons i.e., the bond order. The higher the bond order, the stronger the pull between the two atoms and the shorter the bond length. Hence, as the number of bonds increases between two carbon atoms, atoms in bonding come closer to each other and bond length decreases.
Note: The question is incomplete as it is missing options which are a) number of electrons between the carbon atoms b) bond energy c) bond length d) all of these
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Is hydrogen PENToxide (not peroxide) a monoatomic ion or polyatomic ion. Or neither?
Since hydrogen peroxide is both acidic and basic, it serves as both an oxidizing and a reducing agent.
What type of molecule is hydrogen peroxide?Chemically, hydrogen peroxide has the formula H2O2. It is a very light blue liquid that is only a little bit more viscous than water in its pure state.Hydrogen peroxide, or H2O2, is neither monoatomic nor diatomic in nature. Tetraatomic molecules are what it is. indicates that the molecule has two hydrogen atoms and two oxygen atoms, for a total of four atoms. Due to its two hydrogen atoms, the hydrogen gas is a diatomic molecule. H 2 is the subscript in the hydrogen atomic formula.Since hydrogen peroxide is both acidic and basic, it serves as both an oxidizing and a reducing agent. being a monoatomic molecule since it only has one atom.To learn more about hydrogen peroxide refer to:
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What are the 3 properties of compounds?
A compound is a substance that is formed when two or more elements chemically combine in a fixed ratio by mass.
Compound is a substance that is made from two or more different elements that have been chemically joined. Some of the examples of compounds includes water (H₂O), which is made from the elements hydrogen and oxygen, and table salt (NaCl), which is made from the elements sodium and chloride.
Important properties of compounds.
Elements in a compound are always in fixed proportion.Compounds can be broken down into chemical form only.Particles present in the compounds are of one kind only.Compounds are homogenous in nature i.e. identical.Learn more about compounds from the link given below.
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Photosynthesis generates which form of energy for use by the plant?
Answer: Photosynthesis generates chemical form of energy for use by the plant. It is basically a process by which plants convert light energy into chemical energy.
Explanation: Plants absorb water (H2O) and carbon dioxide (CO2) from the soil and atmosphere during photosynthesis. After this, water is oxidized, which means it loses electrons, while carbon dioxide is reduced, which means it receives electrons, inside the plant cell. Water is converted into oxygen and carbon dioxide into glucose as a result. After storing energy within the glucose molecules, the plant releases the oxygen back into the atmosphere. Chloroplasts are tiny organelles that are found inside plant cells and are used to store solar energy. Chlorophyll, a light-absorbing pigment found in the thylakoid membranes of the chloroplast, is what gives plants their green hue. Chlorophyll absorbs energy from blue and red- light waves during photosynthesis and reflects green light waves, giving the appearance of a green- colored plant.
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What is the state of sodium at 20 degrees?
Sodium is in a solid state at 20 degrees. Table salt, or sodium chloride, is another name for this substance. It is a solid, white crystalline substance that is easily fractious at 20 degrees.
Sodium: What is it?Alkaline earth group (Group a and group b [Ia]) of something like the periodic table element sodium (Na). The element sodium is an extremely delicate silvery-white. Sodium makes up 2.8 percent of the Earth's crust and is the most prevalent alkali metal & sixth most plentiful element on the planet.
What causes low sodium levels most frequently?The main issue is typically having much more water in your body. The salt levels are diluted by the extra water. Hyponatremia is far less frequently brought on by severe sodium lauryl from human body.
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What are the 4 mechanisms that are used by enzymes?
These mechanisms consist of covalent catalysis, catalysis through proximity and orientation, acid-base catalysis and steel ion catalysis.
In covalent catalysis, the catalytic residue in the energetic site is accountable for forming a transient covalent bond. The response then occurs, changing the substrate into merchandise and forming an enzyme merchandise complicated. The merchandise then go away the energetic site of the enzyme. The first step of an enzyme catalyzed response is catalytic turnover the binding of substrate via way of means of the enzyme the discharge of product dissociation of the ES complicated ES -> E + P. An enzyme-catalyzed response may be more or less divided into 3 stages: enzyme-substrate binding, "catalysis" and product release.
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The lack of gravity in pace caue a reditribution of bodily fluid. Decribe what happen to the body due to thi change
Absence of gravity in pace or any actual work is answerable for 30% mortality in men and 60% of the demise rate in ladies. It is the main source of redistribution of bodily fluid .
A portion of the day to day routine exercises which lead to a stationary way of life are perusing, sitting, staring at the TV, utilization of the PC and playing computer games. Illnesses whose chance variable builds because of an absence of activity system are kidney stones, liver issues, hypertension, diabetes, colon malignant growth, despondency, cardiovascular infection, uneasiness, corpulence, osteoporosis and thickening of blood.
Very much like the way that exercises give various positive advantages to your body, absence of activity additionally makes many adverse consequences. At the point when you don't work-out consistently, it can influence your temperament, muscles, bones, heart, joints, levels of glucose and lungs. Absence of exercises will make your bones exceptionally frail, aggregate overabundance body weight, causes glitch of organs or disappointment and heart issues. It would likewise make a few persistent ailments, like hypertension and diabetes.
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(Complete question) is:
The lack of gravity in pace cause a redistribution of bodily fluid. Describe what happen to the body due to this change.
What are the causes of juice spoilage?
Fruit juice spoilage is mostly brought on by the growth of osmophilic and acid-tolerant bacteria. Fruit juice consumption is linked to an increased risk of contracting a foodborne illness. Fruit juices are preserved in various ways to lower the likelihood of outbreaks.
What causes spoilage?
Food can rot for a number of reasons, rendering it unfit for ingestion. Perishable foods' quality and safety can both be impacted by light, oxygen, heat, humidity, and bacteria that cause food decomposition. Foods exposed to these conditions will eventually lose their quality.
Fruit juice spoilage is mostly brought on by the growth of osmophilic and acid-tolerant bacteria. Fruit juice consumption is linked to an increased risk of contracting a foodborne illness. Fruit juices are preserved in various ways to lower the likelihood of outbreaks.
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The diagrams above use arrows to represent the speed of a gas particle. Which of the diagrams best represents the speed of the particles of a gas at a fixed temperature, and why?
answer choices
Diagram 1, because all the particles have the same speed.
Diagram 1, because the particles are moving in different directions.
Diagram 2, because the particles have a net kinetic energy of zero.
Diagram 2, because the particles have a variety of different speeds
Diagram 2 best represents the speed of the particles of a gas at a fixed temperature because the particles have a variety of different speeds.
What is speed?
In everyday use and kinematics, the velocity of an object (commonly denoted by v) is the rate of change of position over time, or the rate of change of position per unit time. So it's a scalar quantity. The average velocity of an object within a time interval is the distance traveled by the object divided by the duration of the interval [2] The instantaneous velocity is the limit of the average velocity as the duration of the time interval approaches zero. Velocity is not the same as speed.
Velocity is the dimension of distance divided by time. The SI unit for speed is meters per second (m/s), but the most common everyday speed units are kilometers per hour (km/h) or miles per hour (mph) in the US and UK. ). Knots are widely used in air and sea travel.
Diagram 2 best represents the speed of the particles of a gas at a fixed temperature because the particles have a variety of different speeds.
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How does an atom gain a positive 3 charge?
An atom loses three electrons to form ions with a +3 charge, cations have a positive charge.
What is a charge on an atom?Because there are fewer negatively charged electrons remaining to balance the positive charges of the protons in the nucleus, losing electrons causes atoms to gain a positive charge.
Group IIA elements lose two valence electrons to achieve the electron configuration of the noble gas that comes before them in the periodic table.
Therefore, an atom loses three electrons to form ions with a +3 charge to an atom gain a positive 3 charge.
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What should the sanitizer level be?
What should you not drink with pewter?
We should not drink alcohol or any type of carbonated drink out of pewter. It should be noted that antique pewter, as well as cheaper eastern pewter, may contain lead.
Why you should not drink alcohol out of pewter?
This discolors to a grey-blue color over time. Drinking a beverage from a tankard made of leaded pewter or lower grades of pewter can be harmful to your health over time. Alcoholic beverages should not be stored in pewter for more than 24 hours, and carbonated beverages should never be stored in pewter vessels. Avoid foods that may stain, such as citrus juice and certain salad dressings.
What is Pewter Pitcher ?Pewter is a metal alloy composed primarily of tin, with the remainder typically consisting of copper, antimony, bismuth, and (occasionally) silver. Lead was used in the past, but it is no longer considered safe.
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Alcohol and other fizzy beverages should never be consumed from pewter. It should be noted that both expensive eastern pewter and ancient pewter may contain lead.
Why should you avoid drinking alcohol from pewter?Over time, this turns a grey-blue colour. Over time, consuming liquids from a tankard made of leaded pewter or lesser pewter grades might be detrimental to your health.
Pewter Pitcher: What is it?Tin dominates the composition of the metal alloy known as pewter, with copper, antimony, bismuth, and (rarely) silver making up the majority of the remaining ingredients. Although lead was once used, it is no longer regarded as safe.
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Which of the following statements best describes a nebula?
Answer:
a cloud of adult stars that floats through space where protostars are born.
Explanation:
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