Molecular Mass

350.3 moles

C6H12O3 is a molecular formula that contains 54.5% C, 9.1% H, and 36.4% O and has molar mass of 132 amu.

Avogadro's constant expresses the number of elementary entities per mole of substance and it has the value 6.02 × 1023 .

Thus there will be 2.5 times Avogadro's constant molecules of C6H12O present.

And as each molecule contains 12 atoms of Hydrogen

The number of atoms of Hydrogen present will be 12 times the product of 2.5 times Avogadro's constant.

= 1.806 * 1025 atoms of hydrogen.

Cs = 132.91 g/mol

1 kg = 1000g

595kg x (1000g/1kg) x (1mol/132.91g) = 4476.713566 = 4.48 x 10^3 mol Cs

1,24 moles of beryllium is equal to 11,175 g.

1 mole in 250 ml and 4 moles in 1 liter or 1000 mls

The molar mass of dichlormethane is 84,93 g.

The molecular mass of hemoglobin is approximately 64,500 daltons.

Cu(s) + 2AgNO3(aq) ---> Cu(NO3)2(aq) + 2Ag(s)

So you need half as many moles of Cu. Thus 5.8/2 = 2.9 moles of Cu are needed.

666 is atomic weight of diamond

Well first you should determine the molecular mass of your glucose molecule, then you should divide the molecular mass of all the carbon by this, if I recall correctly.

Should look something like

(12X6) / ((6X12)+(12X1)+(6X16))

All multiplied by 100 to make it a percentage.

Gives something like 40% which sounds like the right answer looking at the question.

249.72 g/mol

36.5

This depends on pressure and temperature: at standard values (1 atm. 25oC) all gases take 22.4 Litre per mole:

So, 2.5 x 22.4 L = 56 L

4,5 moles of copper are equivalent to 285,957 g.

The atomic mass of Potassium is 39 and that of Sulfur 32. The formula for Potassium Sulfide is K2S therefore the molecular weight of Potassium Sulfide is (39 * 2) + 32 = 110. Therefore one mole of Potassium Sulfide weighs 110 grams. Therefore 3.3 moles of Potassium Sulfide weigh 110 * 3.3 = 363 grams.

7.4 x (6.02 x 1023) = 4.4548 x 1024 atoms of mercury.

A mole is simply a unit of measurement, like a kilometer or a mile. Just like a kilometer contains 1,000 meters, a mole contains 6.02 x 1023 atoms. Therefore 1 mole of anything, be it mercury atoms, water molecules, or even oranges will always be 6.02 x 1023.

2 moles H2SO4 (98.086 grams/1 mole H2SO4)

= 196.172 grams of sulfuric acid
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divide this number by avagadros number to get moles.

(5.16x1024)/(6.02x1023)=8.57mol of H2O

as there are 3 atoms in each molecule there are 3x8.57=25.7 moles of atoms.

16,875 moles of oxygen are needed.

5 moles of lead is equal to 1 036 g.

The molecular weight of acetic acid (CH3CO2H) can be calculated from the component atomic weights of each of the atoms present in the molecule.

In this particular example (C2H4O2) there are:

2 Carbon atoms with molecular weight of 12.01 = 24.02

4 Hydrogen atoms with molecular weight of 1.008 = 4.032

2 Oxygen atoms with molecular weight of 16.00 = 32.00

Therefore the total molecular weight of Acetic acid = 60.05 grams per mole

The amount of grams in two moles depends on the element or compound that you have two moles of. For example, the molar mass of oxygen is about 16 grams. So two moles of oxygen would be about 32 grams.

I will assume the ether behaves as an ideal gas. In that case, a mole (gram molecular weight) of the gas occupies 22.4 liters at STP.

If 3.96 liters weigh 8.12 grams, then 22.4 liters weighs x where:

8.12/3.96 = x/22.4

Turn the crank, and 22.4 liters of ether weigh 45.9 grams, the gram molecular weight of ether.