Can some please check my answers for the following questions? THANK YOU.

1)The chemical formula for aspirin is C9H8O4. What is the mass of 0.40 mol of aspirin?
ANSWER: 45 g

2)The gram molecular mass of oxygen is.
ANSWER: 16.0 g

3)What is the mass, in grams, of 3.01 x 10^23 molecules of water?
ANSWER: 9.00 grams

2) No. Oxygen is naturally occuring as a molecule, O2, molecular mass 32

1) No. Mole mass of asprin is much more, close to 180 grams per mole. Recalculate.

3) yes.

1) The molar mass of aspirin (C9H8O4) can be calculated by adding up the atomic masses of each element in the formula.

C: 9 x 12.01 g/mol = 108.09 g/mol
H: 8 x 1.008 g/mol = 8.064 g/mol
O: 4 x 16.00 g/mol = 64.00 g/mol

Now, adding the masses together:
108.09 g/mol + 8.064 g/mol + 64.00 g/mol = 180.15 g/mol

To find the mass of 0.40 mol of aspirin, we can use the formula:

Mass (g) = Number of moles x Molar mass
Mass (g) = 0.40 mol x 180.15 g/mol
Mass (g) = 72.06 g

So, the correct mass of 0.40 mol of aspirin is 72.06 g, not 45 g.

2) The gram molecular mass of oxygen actually refers to the molar mass of oxygen, which is the average mass of one mole of oxygen atoms.

The atomic mass of oxygen (O) is approximately 16.00 g/mol. Hence, the correct gram molecular mass (molar mass) of oxygen is 16.00 g/mol.

3) To calculate the mass of 3.01 x 10^23 molecules of water (H2O), we need to know the molar mass of water first.

The molar mass of water (H2O) can be calculated by adding up the atomic masses of each element in the formula.

H: 2 x 1.008 g/mol = 2.016 g/mol
O: 1 x 16.00 g/mol = 16.00 g/mol

Now, adding the masses together:
2.016 g/mol + 16.00 g/mol = 18.02 g/mol

To find the mass of 3.01 x 10^23 molecules of water, we can use the formula:

Mass (g) = Number of molecules x Molar mass / Avogadro's number
Mass (g) = 3.01 x 10^23 molecules x (18.02 g/mol) / (6.022 x 10^23 molecules/mol)

After the calculation, the correct mass is 9.00 grams. So, your answer is correct.

To check the answers for the given questions, let's go through each of them and explain how to arrive at the correct answers.

1) The chemical formula for aspirin is C9H8O4. To find the mass of 0.40 mol of aspirin, we need to calculate the molar mass of aspirin.

The molar mass of aspirin can be calculated by summing the atomic masses of each element in the formula.

C: 9 atoms x 12.01 g/mol = 108.09 g/mol
H: 8 atoms x 1.01 g/mol = 8.08 g/mol
O: 4 atoms x 16.00 g/mol = 64.00 g/mol

Total molar mass of aspirin = 108.09 g/mol + 8.08 g/mol + 64.00 g/mol = 180.17 g/mol

Now, we can find the mass of 0.40 mol of aspirin by multiplying the molar mass by the number of moles:

Mass = 0.40 mol x 180.17 g/mol = 72.07 g

Therefore, the correct answer is not 45 g. The correct mass of 0.40 mol of aspirin is 72.07 g.

2) The gram molecular mass of oxygen is not 16.0 g as stated. The atomic mass of oxygen is approximately 16.00 g/mol, but since oxygen naturally occurs as a diatomic molecule (O2), the gram molecular mass of oxygen (O2) is twice the atomic mass.

Gram molecular mass of oxygen (O2) = 2 x 16.00 g/mol = 32.00 g/mol

Therefore, the correct answer is 32.00 g/mol.

3) To find the mass, in grams, of 3.01 x 10^23 molecules of water, we need to calculate the molar mass of water (H2O) and then convert the number of molecules to moles.

The molar mass of water can be calculated by summing the atomic masses of each element in the formula:

H: 2 atoms x 1.01 g/mol = 2.02 g/mol
O: 1 atom x 16.00 g/mol = 16.00 g/mol

Total molar mass of water = 2.02 g/mol + 16.00 g/mol = 18.02 g/mol

Now, we can convert the number of molecules to moles by dividing the given number of molecules by Avogadro's number (6.022 x 10^23 molecules/mol):

Number of moles = 3.01 x 10^23 molecules / 6.022 x 10^23 molecules/mol = 0.5 mol

Finally, we can calculate the mass by multiplying the number of moles by the molar mass:

Mass = 0.5 mol x 18.02 g/mol = 9.01 g

Therefore, the correct answer is 9.01 grams, not 9.00 grams.