Conceptual
What do you call the substances that react together to form a new substance in a chemical reaction?
a) Reactant
b) Product
c) Coefficient
d) Subscript
A
To convert moles to atoms, what unit must go at the BOTTOM of your conversion factor fraction?
a) gram
b) atoms
c) particle
d) mol
D
How many nitrogens are in NO3
1
Molar mass is the mass of ...
a) 1 atom of substance
b) 1 mol of substance
c) 1 gram of substance
d) 1 dozen of substance
b
How many atoms are in 1 mole?
How many moles is 5.19 x 1024 atoms of Titanium (Ti)?
Round to the nearest 0.1 and include the correct unit.
8.6 mol
How many carbons are in 2C4H6O2 ?
8
What is the molar mass of O2
32 g
Which of these is FALSE about the law of conservation of mass?
a) Mass cannot be created or destroyed
b) Mass of reactants must equal the mass of products
c) Law of conservation of mass is the reason chemical reactions must be balanced on both sides
d) The mass of the products is always double the mass of the reactants
D
How many moles is in 32.89 grams of fluorine gas (F2)? Round to the nearest 0.01 include the correct unit.
0.87 mol
How many oxygens are on the REACTANT side of this chemical reaction?
H2 + O2 -> H2O
2 (reactants are on the left, products are on the right)
What is the molar mass of CO2
INCLUDE THE CORRECT UNIT FOR POINTS
44.01 g
12.01 + 16.00(2)
Is the following reaction balanced or unbalanced?
Zn + Cl2 → ZnCl3
Unbalanced
How many grams is 2.09 moles of Mercury Oxide whose formula is HgO2?
Round to the nearest 0.1 include the correct unit.
486.1 g
Balance the reaction
____ H2 + ____ S2 → ____ H2S
___2_ H2 + __1__ S2 → __2__ H2S
What is the molar mass of MgN2O6
INCLUDE THE CORRECT UNIT FOR MASS
148.33 g
24.31 + 14.01(2) + 16.00(6)
Fill in the missing data below according to the law of conservation of mass: Na + Cl -> NaCl
Na = 12 g
Cl = ?
NaCl = 30 g
18 g
Sally has a sample of 0.37 moles of silver (Ag). How many atoms of silver is this? Round to the nearest 0.01 include the correct unit.
2.25 x 1023 atoms
What coefficients would go in the following blanks to balance this reaction
____ K2O + ____ CsBr → ____ KBr + _____ Cs2O
1, 2, 2, 1
Which of these is FALSE
a) Molar mass is the mass of 1 mol
b) Molar mass is the mass of 6.022 x 1023 atoms
c) Molar mass is the mass of 1 atom
d) Molar mass is found using the periodic table
C