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WorksheetsPost Test: Intervention to Chemistry
Total questions: 30
Worksheet time: 51mins
Stoichiometry is founded in the Law of Conservation of Matter
TRUE
FALSE
The amount of the product can be calculated if the amount of separate reactants is unkown.
FALSE
TRUE
It refers to the total mass of the reactants equals the total mass of the product leading to the insight that the relations among quantities of reactants and products typically formed a ratio of positive integers.
Law of Conversion of Mass
Law of Conversation of Mass
Law of Convergence of Mass
Law of Coverage of Matter
It refers to the maximum amount of product that could be formed from the given amounts of the reactant
Theoretical Yield
Actual Yield
Limiting Reactant
Excess Reactant
How many moles of Ethyne is needed to balance the chemical reaction?
C2H2 + O2 -> CO2 + H2O
1
3
4
2
How many moles of Carbon Dioxide is needed to balance the chemical reaction?
C2H2 + O2 -> CO2 + H2O
1
3
4
2
How many moles of O2 is needed to balance the chemical reaction?
C2H2 + O2 -> CO2 + H2O
5
3
4
2
How many moles of water is needed to balance the chemical reaction?
C2H2 + O2 -> CO2 + H2O
5
3
4
2
Answer the given problem by using the chemical reaction below.
C6H12O6 → 2C2H5OH + 2CO2
How many grams of C6H12O6 was initially used if 10g of C2H5OH was produced?
10.18g of C6H12O6
19.55g of C6H12O6
18.06g of C6H12O6
17.36g of C6H12O6
It indicates how successful a reaction has been.
Excess Reactant
Actual Yeild
Percentage Yield
Limiting Reactant
When 11.0 g of CaCl2 dissolves in 45.0 g of water, what is the boiling point of the solution? (Kb = 0.512 oC/m)
3.4
103.4
101.1
1.1
101.4
When 26.0 g of NaCl, are dissolved in 0.5 kg of water, what is the freezing point of this solution? (Kf = 1.86 oC/m)
-3.3
103.3
-1.7
-0.8
How many grams of NaCl need to be dissolved in 50g of water to make a 0.2m solution?
1.8g
0.1g
1.6g
0.6g
Which is a quality that only gases display?
Spread out to fill all available space
Can be compressed
Take the shape of their container
All of these
Boyle's PV law : When _______ is held constant, the pressure and volume of a gas are ________ proportional
temperature, equally
temperature, inversely
mass, equally
mass, inversely
Charles' Law States...
As Volume goes up temperature goes up
As Pressure goes down volume goes down
As Pressure goes up volume goes down
As Pressure goes up temperature goes up
The Ideal Gas Law is understood as: PV=nRT. How does the Ideal Gas Law explain how a hot air balloon rises in the sky?
P is a constant. So as T increases as the air is heated at constant n, volume of the balloon increases causing it to rise.
P and V are kept constant, so as T increases, n must decrease causing the balloon to rise.
V is constant, so as T increases at a constant n, pressure increases causing the balloon to rise.
None of these
Gases generally have
low density
high density
closely packed particles
no increase in volume when temperature is increased
no decrease in volume when pressure is increased
Pressure is
defined as the mass that an object exerts when at rest
measured in Newtons
defined as the number of moles of substance divided by the mass of the substance
defined as the force per unit area
measured in grams
A gas sample is held at constant pressure. The gas occupies 3.62 L of volume when the temperature is 21.6°C. Determine the temperature at which the volume of the gas is 3.42 L.
312K
278K
20.4K
295K
552K
Find the normality of 0.15M HCl
a. 0.015 N
b. 0.15N
c. 15N
.
d. 1.5N
FIND THE NORMALITY OF 0.4 M Ba(OH)2
a. 0.5 N
b. 0.2 N
c. 0.8 N
d. 4 N
What is the molality of a solution made by dissolving 2 moles of NaOH in 400 grams of water?
a.0.5 mol/kg. solvent
b. 0.4 mol/kg solvent
c. 0.3 mol/kg. solvent
d. 2.5 moles /kg solvent
