Explanation:
octet is an atom or an ion having a maximum of eight electrons in the outermost shell while duplet is an atom having the maximum of two electrons in the outermost shell
What is the molar mass of Mn2Se7 ?
A.) 601.34 g/mol
B.) 542.50 g/mol
C.) 662.60 g/mol
Answer:
C. 662.60
Explanation:
the mass of Mn is about 54 grams/mol, (multiply that by 2 since there are 2 Mn's).
the mass of Se is about 79 grams/mol, so multiply that by 7
if you add them, you get 662.60 (approxamitly)
Answer:
C) 662.60
Explanation:
~~55*2 + 79*7 = 110 + 553 = 663 (~~662.60)
Drag the tiles to the correct boxes to complete the pairs.
Nelly goes shopping on a weekday. She picks up protein powder so she can make a protein shake. She buys a double cheeseburger on her way home. She eats part of it, and then stores the rest of it in a paper bag so she can eat it later. Later in the day, she puts together several small packages of candies as gifts for her nieces and nephews. She labels each package and sends it through the mail.
Match each item or action with the organelle it could represent.
Protein shake -------------> Ribosome
Paper bag -------------> Vacuole
Packing candles -------------> Golgi Apparatus
im not 100% sure if paper bag and packing candles is correct.
If a star is 300 light years away from Earth, how long does it take light from that star to reach Earth?
A. 300 days
B. 300 hours
C. 300 years
D. 300 light years
Answer: It would take 300 light years to reach Earth.
Explanation:
You are decomposing 2.00 mol of baking soda according to the following equation:
2 NaHCO3 -> Na2CO3 + CO2 + H2O
If you only collected 0.750 mol of Na2CO3 after the reaction finished, what was the
percent yield?
75.0%
62.5%
37.5%
25.0%
Question 6 (1 point)
✓ Saved
show the path to the formation of sodium calcium and aluminum bases please help me
Answer:
i hope this helps :)
Explanation:
please mark brainlest
Answer:
dunno
Step-by-step explanations:
HELP ME ASAP PLZZ 21 POINTS
Answer:
A, D, F
Explanation:
Cold currents usually go along with Earth's rotation while the warm waters are subjected to the coriolis effect and go in a direction against Earth's rotation.
This is agree or disagree I need help ASAP!!
Answer:
disagree
sometimes they attract
Explanation:
Answer:
Explanation:
2. Agree
3. Agree
4. Agree
5. agree
6. disagree
If im wrong its because im tired lol
The atmosphere is the air surrounding Earth and is made up of 78% _____, 21% oxygen, and other trace gases. Please help this is urgent!!
HELP ASAP !!! PLS ITS DUE IN LIKE 4 MINUTES
Answer:
they have the same structures in common
Choose the correct name for each acid. Click here
to access the common polyatomic ion sheet.
HNO2:
DONE
HI:
DONE
H3PO4 :
DONE
The correct name of HNO₂, HI and of H₃PO₄ is nitrous acid, hydroiodic acid and phosphoric acid respectively.
What are acids?Acids are those substances in which carboxylic acid (-COOH) is present and pH value of acids falls in the range of 0 to 6.9.
Name of the HNO₂ compound is nitrous acid, of HI is hydroiodic acid and of H₃PO₄ is phosphoric acid.
Hence name of the HNO₂, HI and of H₃PO₄ is nitrous acid, hydroiodic acid and phosphoric acid respectively.
To know more about acids, visit the below link:
https://brainly.com/question/24375075
#SPJ2
Answer: HNO2 nitrours acid
HI Hydroiodic acid
H3PO4 phosphoric acid
Explanation: edu
the internal energy of a substance Is called
Answer:
The internal energy is the total amount of kinetic energy and potential energy of all the particles in the system. ... When the substance melts or boils, energy is put in to breaking the bonds that are holding particles together, which increases the potential energy.
Explanation:
Molarity is measured in
A.) moles per mL
B.)moles per kJ
C.)moles per kg
D.)moles per L
HELP MEEE PLEASEEEEEEEEEEEEEE
I think its the sea cucumber and sea urchin
but it could be the star too
what is the advantage of rusting
Answer:
Provide more strength
Explanation:
Rust is metal that has been oxidised . Oxides are usually more fragile and porous than their crystals metal equivalents. Some oxides, such as Aluminum oxide, are useful because they have a thin, strong shell that protects the metal from further corrosion.
Calculate the percentage composition of sugar, C12H22011.
Answer:
%C= 42.1
%H=6.5
%O=51.4
Explanation:
Mass%=(mass/total)× 100%
What is the mass in grams of 4.4 moles of the element tungesten, W?
Answer:
806.96 g
Explanation:
From the question,
Using,
No. of mole = reacting mass/molar mass.
n = R.m/m.m....................... Equation 1
make R.m the subject of the equation
R.m = molar mass of tungsten × number of mole of tungsten.................. Equation 2
Given: number of mole of tungsten = 4.4 moles
Constant: Molar mass of tungsten = 183.8 g/mol
Substitute these values into equation 2
Therefore,
mass of tungsten = 4.4×183.4
mass of tungsten = 806.96 g
809.6g is your answer
Answer:
1 mole of tungsten =184 g
4.4 mole of tungsten =184×4.4=809.6g
80.0 grams of NaOH is dissolved in water to make a 6.00 L
solution. What is the molarity of the solution? (Molar mass of NaOH
= 40.0 g/mol)
M М.
Answer:
0.333 M
Explanation:
Divide the mass of NaOH by the molar mass and then divide by the volume.
80.0 g / 40.0 g/mol = 2.00 mol NaOH
2.00 mol NaOH / 6.00 L = 0.333 M NaOH
A 2.50 L sample of butane gas (C4H10), measured at 22.0
oC and 1.20 atm pressure, is combusted completely and
the carbon dioxide gas collected at the same pressure and
temperature. What volume of CO2 is produced?
Answer:
Same i guess hdjekfhkshfjfkr
The resultant volume of the carbon dioxide gas which is produced by the combustion of butane is 14.4L.
How do we calculate the moles of gas?Moles of any gas will be calculated by using the ideal gas equation as:
PV = nRT, where according to qustion for butane gas
P = pressure = 1.20 atm
V = volume = 2.50L
n = moles = ?
R = universal gas constant = 0.082 L.atm / K.mol
T = temperature = 22 degree celsius = 295.15 K
On putting values we get
n = (1.20)(2.50) / (0.082)(295.15) = 0.124 moles
Given chemical equation is:
C₄H₁₀ + 13/2O₂ → 4CO₂ + 5H₂O
From the stoichiometry of the reaction, it is clear that,
1 mole of C₄H₁₀ = produces 4 moles of CO₂
0.124 mole of C₄H₁₀ = produces 4×0.124=0.496 moles of CO₂
Now we calculate the volume for the carbon dioxide gas at the given pressure and temperature as:
V = (0.496)(0.082)(295.15) / (1.20) = 14.4 L
Hence required volume of CO₂ is 14.4 L.
To know more about ideal gas equation, visit the below link:
https://brainly.com/question/24236411
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Can anyone help me out?
What does oxygen hitch a ride on to move from the lungs to the blood and eventually the heart? Your answer
HELPPPPPPP PLEASEEEE
Answer:
Plant and Animal
Explanation:
The others are not accurate
You add 28 grams of carbon. You find the actual yield to be 181.2 grams of CO2. What is the percent yield of CO2?
Answer:
79.14%
Explanation:
Given the equation : 2Fe2O3 + 3C 4Fe + 3C02
The theoretical yield of CO2 ; is 102.6g
Actual yield = 81.2 gram
Percentage yield = (actual yield / theoretical yield) * 100%
Percentage yield = (81.2 / 102.6) * 100%
Percentage yield = 0.7914230 * 100%
Percentage yield = 79.14%
Hence, tbe percentage yield of CO2 is 79.14%
Question 15 (3 points)
How are cations and anions related to metals and nonmetals?
Answer:
uff mere dil ma ture kali chadiya ha uff tumi apne buni ha
Answer:
Cations (positively-charged ions) and anions (negatively-charged ions) are formed when a metal loses electrons, and a nonmetal gains those electrons. ... And all of them form an anion with a single negative charge.
A greenhouse is filled with air that cotains more carbon dixoide than normal air has. How might phothsyphness and plant growth be affeacted
Answer:
See explanation
Explanation:
We know that photosynthesis involves the combination of carbon dioxide and water in the presence of sunlight to yield glucose.
If the atmosphere is rich in carbon dioxide such as in a green house where air is filled with carbon dioxide, the rate of photosynthesis is increased.
As the rate of photosynthesis is increased, the growth of plants is also increased.
Hence, in a greenhouse where the air contains more carbon dioxide, the rate of plant growth increases.
Where did scientists find most of the nitrogen that the rats ate?
Answer:
They found the rats near or in a lake or river, due to high concentration of nitrogen in their body.
True or false: The phenolphthalein indicator changes colour close to the point of neutralization which shows the end-point of the titration.
Answer:
True
Explanation:
A titration can be defined as the experiment where the volume of known con concentration is mixed into another solution whose concentration is not known.
Most of the titration are acid-base titration. When performing titration the indicator which is used is usually phenolphthalein. The end point of the titration is the point where the indicator changes its color.
In case of acid base reaction, the end point is achieved when the phenolpthalein turns faint pink in color from transparent.
Hence, the given statement is correct, the indicator changes its color close to the end point of titration.
hey y'all i just want to know, do whales and dogs have a common ancestor?
yes
Explanation:
Which suggests that in an earlier time whales and dogs could have evolved from the same organism. the common ancestor in the 2 animals share notible traits. the pakicets was one of the whales ancestors and the grey wolf was the dogs ancestor.
Which of these is a benefit of fuel cell cars?
A. Fuel cell cars reduce the use of fossil fuels.
B. Hydrogen fuel is volatile.
C. Fuel cell cars are quickly recharged.
D. Hydrogen fuel is a limited resource.
Answer:
A.
Explanation:
There are no vehicle emissions other than water vapor. This means no pertroleum products and no fossil fuels. :)
-Sienna Sushi
What volume of 7.68 M NaOH (aq) will neutralize 1.15 L of 2.35 M H2SO4 (aq) ?
A)1.38 L
B)0.704 L
C)0.276 L
D)1.90 L
E)1.75 L
How many grams are in 2.4mol sulfur, S?
A.)77g
B.)6.2x10^2g
C.) 0.075g
Answer:
77.0 grams S