answersLogoWhite

0

To solve for moles you need either a) particle (atoms, compounds etc.) or b)Mass (grams). From this you can then determine the number moles (mol).

To convert particles to number of moles you must DIVIDE the particle by Avogadro's Number (6.0221415 X 1023). If asked for number atoms, and you are only given the number of compounds, you must then multiply this answer by the number of atoms in the compound.

To convert mass (grams) to number of moles, you must DIVIDE the mass by the molar mass (g/mol) of the substance, that is the atomic mass of each atom [e.g H2O has a molar mass of 2 X 1.00794 g/mol (Atomic Mass of hydrogen X2 as there are 2 H atoms) + 15.9994 g/mol = 18.01528]. Divide the mass (g) of the substance by the molar mass of the substance.

Ex/ Determine the number of moles of a 15.0g sample of H2o?

n= 15.0g/18.01528g/mol

n= 0.833 mol

Ex2/ Determine the number of moles of 7.445 x 105 molecules of H2O.

n=6.0221415 x 1024 molecules/ 6.0221415 x 1023 molecules/mol

n=1.00 x 102 mol

User Avatar

Wiki User

17y ago

What else can I help you with?

Related Questions

calculate the number of moles in H2 molecules in 4g H2?

2 moles.


Calculate the number of molecules in 8.0 moles of CH?

CH is not a molecule.


Can you calculate the number of molecules in 8.0 moles of CH?

CH is not a molecule.


Calculate the number of molecules in 8.0 moles of all?

The answer is 6,022140857.1023 x 8 = 48,177126856.1023 molecules.


How do you calculate the number of molecules in moles?

You can calculate the number of molecules in a mole using Avogadro's number, which is 6.022 x 10^23. Simply multiply the number of moles by Avogadro's number to get the number of molecules. This calculation allows you to convert between moles and molecules.


What would be the Mass of 3 moles of ammonia and calculate the number of ammonia molecules?

The mass of 3 mol of ammonia is 51,093 g; the number of ammonia molecules in 3 moles is18,066422571.10e23.


How many moles are in 1000000000 molecules of H2O2?

To calculate the number of moles in 1,000,000,000 molecules of H2O2, divide the number of molecules by Avogadro's number (6.022 x 10^23 molecules/mol). So, 1,000,000,000 molecules / 6.022 x 10^23 molecules/mol ≈ 1.66 x 10^-14 moles of H2O2.


How many molecules (not moles) of NH3 are produced from 5.95104 g of H2?

To find the number of molecules produced, first calculate the number of moles of H2 using its molar mass. Then, use the balanced chemical equation to relate the number of moles of H2 to NH3. Finally, convert the moles of NH3 to molecules using Avogadro's number, which is 6.022 x 10^23 molecules/mol.


How many molecules are there in 9.34 L of O2?

To find the number of molecules, first calculate the amount of O2 in moles using the ideal gas law. Then use Avogadro's number (6.022 x 10^23 molecules/mol) to convert moles to molecules.


How many molecules of ethane gas C2H6 are in 15 grams of the compound?

To calculate the number of molecules in 15 grams of ethane (C2H6), first find the molar mass of C2H6, which is 30.07 g/mol. Next, calculate the number of moles in 15 grams using the formula: moles = mass / molar mass. Finally, use Avogadro's number (6.022 x 10^23 molecules/mol) to convert moles to molecules.


What is the answer to the number of moles present in 1.5 1023 molecules of C2H6?

If you meant 1.5*10^23 and not 1.51023 molecules, see below:1.5*10^23 molecules / (6.022*10^23 molecules/mol)= 1.5/6.022 mol=.25 moles, rounded to two significant figures.


How many moles are in 8.23 x 1024 of calcium carbonate?

To find the number of moles in 8.23 x 10^24 molecules of calcium carbonate, you first need to determine the molar amount of molecules in one mole of calcium carbonate by using Avogadro's number. Then, divide the given number of molecules by the molar amount to calculate the number of moles.