Fundamental Mole Questions
What is Avogardros number?
6.02 × 10^23
What is the mass of one mole of methane (CH4, C=12, H=1)
16g/mol
How many oxygen atoms are there in 0.6 mol of SO2?
7.224e 23
How many atoms of oxygen are in 2 moles of O2?
2.408x10^24
What is the definition of molar mass?
The mass of one mole of a substance.
What is the mass of 0.25 mol of methane? (CH4, C=12, H=1)
4g/mol
How many moles of atoms are there in 0.2 mol C2H6 molecule?
1.6 mol
How many moles of oxygen are in 2.71x10^25 molecules of carbon dioxide (CO2)
90 moles
What is molar mass equal to? (termwise)
Atomic mass
Do the following conversions (C=12, H=1) 0.4 mol C2H6 =...... g C2H6= ............C2H6 molecules
1) 12g/mol 2) 2.408e 23
How many moles of atoms are there in 0.2 mol of H2SO4?
1.4 mol atom
The diatomic molecule of an element Z has a mass of 6.31 × 10^-23 g. What is the atomic weight of the element Z?
19.0g
Calculate the atomic weight of SO3? (S=32, O=16)
80g/mol
Do the following conversions ((NH4)2 SO4, N=14, H=1, S=32, O=16) 8,8g (NH4)2 SO4 =...... mol (NH4)2 SO4 = ............NH4)2 SO4 particles
1) 0.06 g mol 2) 3.612e 22
How many atoms are contained in 0.6 mol of SO2?
4.3344e 24
What volume of hydrogen will react with 22.4 liters of oxygen to form water ? (All volumes are measured at STP)
44.8L
Calculate the atomic weight of Al(OH)3 (Al=27, O=16, H=1)
78g
Calculate the volume of 20g of CO2 (C=12, O=16)
10.08L
0.06 mol of O is present in 2.64g of X2O3. Find the molar mass of x. (O=16)
42g
How many g of CaCO3 are present in a sample if there are 4.52 × 10^24 atoms of carbon in that sample? (Ca=40, C=12, O=16)
750g CaCO3