Molar Mass
What is the molar mass of Carbon?
12.01 g/mol
Calculate the mass of 1 mole of Helium.
4.00 g
What is the empirical formula for a compound with the molecular formula H2O?
H2O
Predict the identity of the unknown element when 2 moles has a mass of 2.02 g.
Hydrogen
What is the EF of a compound with the molecular formula C6H6
CH
What is the molar mass of MgO?
What is 40.31 g/mol.
Calculate the number of moles of 5.7 g of H2.
2.8 mol
Find the empirical formula for a compound that is 75.7% by mass tin and 24.3% by mass fluorine.
SnF2
What is the % by mass of hydrogen in NH3?
17.8%
Which of the options is a possible molecular formula for this EF: CH2
C2H2
C3H6
C5H4
C3H6
What is the molar mass of H2O?
What is 18.02 g/mol.
Calculate the mass of 2.10 moles of NaCl.
123 g
What is the empirical formula of a compound that contains 3.88 g Cl and 6.12 g O?
Cl2O7
How many atoms in 45.0 moles of carbon?
2.71 x 1025 atoms
How is a mole similar to 1 dozen?
like 1 dozen, 1 mole is a specific # of things (particle)
What is the molar mass of Be(NO2)2?
101.03 g/mol.
Calculate the number of moles of 104 g of Mg(C2H3O2)2
0.730 mol
What is the molecular formula of a compound that has an EF of CH2 and a molar mass of 70 g?
C5H10
2.09 x 1011 molecules of water is equivalent to how many moles of water?
3.47 x 10-13 moles
Which sample contains a larger number of atoms, 1 mole of carbon or 1 mole of hydrogen?
Double points: which has a larger mass?
same number of atoms, but 1 mol C has higher mass
What is the molar mass of Mg3(PO3)2?
What is 230.87 g/mol.
Calculate the number of moles of 302 g of aluminum oxide.
2.96 mol
What is the molecular formula of a compound with a molar mass of 180 g/mol that is 40.0% C, 6.72% H, and 53.3% O?
C6H12O6
What is the mass of 3.10 x 1020 molecules of water?
*Double points if in scientific notation with correct sig figs!
9.28 x 10-3 g
Which contains a larger number of atoms, 1 mole of carbon, or 1 mole of CO2?
1 mole CO2