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WorksheetsChemistry - Unit 8 Quiz
Total questions: 9
Worksheet time: 9mins
1 mole defines:
the number of atoms in 1 molecule
the molar mass of 1 molecule
the amount of a substance
All answers are correct
The coefficients of a balanced equation tell us:
the number of grams of that substance
the ratio of moles of each substance in a chemical equation
the number of molecules of a substance that are needed for a reaction to occur
the number of molecules of a substance that will be produced if a reaction occurs
The number of atoms in 1 mole of a substance is called:
Avagadro's number
molecular mass
the coefficients
nothing, there is no such thing
Stoichiometry is a method of:
calculating the molecular weight of a molecule
finding the amounts of reactants and products in a reaction
calculating the amount of energy used or released in a reaction
determining if a reaction will proceed or not
The molar mass of a molecule is:
the atomic mass units of the molecule
the number of atoms in a molecule
the combined weight in grams of the atoms in the molecule
coefficient of the molecule
Calculate the number of grams of sulfur that would be found in 82.4 moles
0.389 grams
2.54 grams
2642 grams
1 gram
Calculate the number of moles of oxygen in 5.54 x 1025 atoms.
92.0 moles
3.34 x 1049 moles
0.0109 moles
3.46 x 1024 moles
Given N2 + 2O2 + 67.8 kJ --> 2NO2, calculate the number of atoms of N2 needed to produce 85 g of NO2
2.55 x 1025 atoms N2
0.924 atoms N2
1.11 x 1024 atoms N2
5.56 x 1023 atoms N2
Given N2 + 2O2 + 67.8 kJ --> 2NO2, calculate the amount of energy needed if 88 g of O2 is burned.
41.5 kJ
93.2 kJ
186 kJ
190925 kJ
