Worksheets6. Quantitative Chemistry
Total questions: 28
Worksheet time: 42mins
What are you finding out if you add the relative atomic masses?
molecular formula
relative formula mass
relative atomic mass
What is the relative formula mass of ammonium nitrate, NH4NO3 ?
[Relative atomic mass: N, 14; H, 1; O, 16]
76
79
80
90
Find Atomic Mass: What is the mass of one mole of Lithium (Li)?
6.9 grams
14.0 grams
22.9 grams
56.9 grams
% Mass of an element in a compound =
Ar x number of atoms of that element / Mr of the compound
(Ar x number of atoms of that element / Mr of the compound) x 100
number of atoms of that element / Mr of the compound
(Mr x number of atoms of that element / Mr of the compound) x 100
During a reaction if the mass goes up it is probably because ...
a reactant is a gas
a product is a gas
During a reaction if the mass goes down it is probably because ...
a reactant is a gas
a product is a gas
How do you convert from cm to dm?
x 1000
/ 1000
x 100
/ 100
What is the unit of mass when working out concentration?
g
mg
kg
all of the above
What is the unit for concentration?
(a)
Concentration is
the amount of solute in the solvent
the amount of solvent in the solute
density
particle size
Which solution is more concentrated?
Solution 1:
500 mL of water
100 g of salt
Solution 2:
500 mL of water
90 g of salt
Solution 1
Solution 2
They have the same concentration
I have no idea
Which solution is more concentrated?
Solution 1:
20 mL of water
5 g of salt
Solution 2:
20 mL of water
10 g of salt
Not enough information to tell
Solution 1
Solution 2
They are equally concentrated
In order to dilute a solution, you need to
add more of the solid
add more water
find the mass
find the volume
In order to compare the concentration of two solutions on a balance, the two solutions must have equal volumes.
true
false
