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S2 Final Exam 2022

Total questions: 52

Worksheet time: 13hrs 0mins

Name
Class
Date
1.
What is a coefficient?
a)
The small number on the right of the chemical symbol.
b)
The large number to the left of a formula.
2.
Which side of a chemical equation is the product side?
a)
Left (before the arrow)
b)
Right (after the arrow)
3.
Which side of a chemical equation is the reactant side?
a)
Left (before the arrow)
b)
Right (after the arrow)
4.

Is the equation balanced?: 3FeO2 + Mg --> 4MgO + 3Fe

a)
Yes
b)
No
5.
Balance this equation
_Zn+_HCl-->_ZnCl2 +_H2
a)
1,1,2,1
b)
1,1,1,2
c)
1,2,1,1
d)
2,1,1,1
6.

How many moles are in 6.02 x 1023 molecules of H2O?

a)

1 mole

b)

2 moles

c)

6.02 moles

d)

602000000000000000000000 moles

7.

How many moles are in 8.30 X 1023 molecules of H2O?

a)

1.378 X 1023 moles H2O

b)

1.378 moles H2O

c)

2 moles H2O

d)

1 mole H2O

8.

How many molecules are there in 31.8 moles of water?

a)

5.28 x 10-23 molecules

b)

1.91 x 1025 molecules

c)

5.28x 10-25 molecules

d)

1.91 x 1023 molecules

9.

How many moles are in 4.5 x 1024 atoms of lithium?

a)

2.71 x 1048 particles

b)

7.47 moles

c)

7.47 x 1024 atoms

d)

2.71 moles

10.

Find the mass of 11.37 mol of BaO.

a)

1,354 g

b)

1,743 g

c)

17.40 g

d)

1,684 g

11.

Determine the number of moles of Al(NO3)3 that are in 264 g of the compound.

a)

1.23 mol

b)

1.45 mol

c)

1.73 mol

d)

1.86 mol

12.

Find the mass of 5.82 mol of MgCl2. Round to the nearest tenth.

a)

552.9 g

b)

436.8 g

c)

55.2 g

d)

555.9 g

13.

Determine the amount of moles of BaCl2 that are in 436 g of the compound.

a)

3.51 mol

b)

2.09 mol

c)

4.6 mol

d)

90788.28 mol

14.

Find the mass of 3.8 mol of H2O. Round to the nearest tenth.

a)

57.9 g

b)

54.8 g

c)

68.4 g

d)

62.3 g

15.

If I initially have 4.0 L of a gas at a pressure of 1.1 atm, what will the volume be if I increase the pressure to 3.4 atm?

a)

1.29 L

b)

12.36 L

c)

1.29 atm

d)

12.36 atm

16.

If I have 5.6 liters of gas in a piston at a pressure of 1.5 atm and compress the gas until its volume is 4.8 L, what will the new pressure inside the piston be?

a)

1.75 atm

b)

3.27 atm

c)

1.75 L

d)

3.27 atm

17.

A sample of nitrogen occupies a volume of 250 mL at 25oC. What volume will it occupy at 95oC?

a)

950 mL

b)

0.001 mL

c)

0.001oC

d)

950 oC

18.
Calculate the volume that a 0.323-mol sample of a gas will occupy at 265 K and a pressure of 0.900 atm.
a)
7.18 L 
b)
7.81 L
c)
4.63 L
d)
4.36 L
19.
Determine the Kelvin temperature required for 0.0470 mol of gas to fill a balloon to 1.20 L under .998 atm pressure. 
a)
0 K 
b)

110 K 

c)

210 K 

d)

310 K 

20.
At 17 °C, a 0.80 mole sample of a gas exerts a pressure of 1.2 atmospheres. What is the volume of the container?
a)
22.9 Liters
b)
2355 Liters
c)
0.0630 Liters
d)

15.86 Liters

21.

These properties describe a ___.

a)

solid

b)

liquid

c)

gas

22.

These properties describe a ___.

a)

solid

b)

liquid

c)

gas

23.

As the temperature of a substance increases:

a)

The speed, and average kinetic energy of the particles, both increase.

b)

The speed, and average kinetic energy of the particles, both decrease.

c)

The speed of the particles increases, but the average kinetic energy of the particles decreases.

d)

The speed of the particles decreases, but the average kinetic energy of the particles increases.

24.

Feet on Hot Sand

a)

Conduction

b)

Convection

c)

Radiation

25.

Lava Lamp

a)

Conduction

b)

Convection

c)

Radiation

26.

Heat Lamps

a)

Conduction

b)

Convection

c)

Radiation

27.
Exothermic reactions...
a)
Absorb energy
b)
Release energy
c)
Release Color
d)
Absorb Color
28.
In an endothermic reaction, heat is ...
a)
taken in or absorbed
b)
given out or released 
29.

O2(g) + 2 H2 (g) → 2 H2O (g) + EnergyO_2\left(g\right)\ +\ 2\ H_2\ \left(g\right)\ \rightarrow\ 2\ H_2O\ \left(g\right)\ +\ Energy  

a)

endothermic

b)

exothermic

30.

6 CO2+ 6 H2O + Energy → C6H12O6 + 6 O26\ CO_2+\ 6\ H_2O\ +\ Energy\ \rightarrow\ C_6H_{12}O_6\ +\ 6\ O_2

a)

endothermic reaction

b)

exothermic reaction

31.

What type of reaction is this?

a)

Exothermic

b)

Endothermic

c)

Energy Producing

d)

No way to tell

32.

How much heat does an aluminum block absorb if 10.00 grams are heated from 25.0oC to 50.0oC? the specific heat of aluminum is 0.9025 J/goC

a)

450.56

b)

-450.56

c)

225.62

d)

-225.62

33.

The specific heat of aluminum is 0.9025 J/g°C. How much heat(Q) is released when a 10.0 g piece of aluminum foil is taken out of the oven and cools from 100.0° to 50.0°?

a)

451.25 J

b)

45.25 J

c)

400.25 J

34.

How many Joules of energy are required to change 10 gram of water from 20 C to 90 C? The specific heat of water is 4.18 J/(g · ºC).

a)

1398 J

b)

2926 J

c)

209,998 J

d)

1,400,000 J

35.
ΔH value in an endothermic reaction is a positive number.
a)
True
b)
False
36.

How do you calculate Enthalpy of a reaction?

a)

ΔH = ΔHproducts - ΔHreactants

b)

ΔT = q / mC

c)

ΔG = ΔH -TΔS

d)

E = mc2

37.

In the reaction picture, the energy will be on product or reactant

a)

Product

b)

Reactant

38.
How many grams of K2Cr2O7, are soluble in 100 g of water at 95 ºC?
a)
83 grams
b)
75 grams
c)
40 grams
d)
12 grams
39.
When 20 grams of potassium chlorate, KClO3, is dissolved in 100 grams of water at 80 ºC, the solution can be correctly described as:
a)
supersaturated
b)
saturated
c)
unsaturated
40.
When 50 grams of KCl is dissolved in 100 grams of water at 50 ºC, the solution can be correctly described as:
a)
supersaturated
b)
unsaturated
c)
saturated
41.
When 42 grams of potassium chloride, is dissolved in 100 grams of water at 50 ºC, the solution can be correctly described as:
a)
supersaturated
b)
saturated
c)
unsaturated
42.

The _____ is the thing being dissolved.

a)

solute

b)

solvent

43.

What is a solvent?

a)

The substance that does the dissolving in a solution.

b)

The substance that is being dissolved in a solution.

c)

The mixing of different substances.

d)

The process in which neutral molecules lose or gain electrons.

44.
How many moles of NaCl are present in a solution with a molarity of 8.59 M and a volume of 125 mL?
a)
1074 mol
b)
0.069 mol
c)
1.07 mol
d)
62.7 mol
45.

Which equation is used to find molarity?

a)

Moles solute/L solution

b)

Moles solute/kg solution

c)

Moles solute/kg solvent

d)

Grams solute/L solution

46.

What is the molarity of a 0.5L sample of a solution that contains 60.0 g of sodium hydroxide (NaOH)

a)

0.8 M

b)

1.5M

c)

3.0M

d)

6.0M

47.

Is this compound soluble or insoluble?

CaOH2

a)

Soluble

b)

Insoluble

48.

Is this compound soluble or insoluble?

HCN

a)

Soluble

b)

Insoluble

49.

Is this compound soluble or insoluble?

AlPO4

a)

Soluble

b)

Insoluble

50.
True or False: Gases can be compressed. 
a)
True
b)
False
51.

What advice do you have for scholars taking chemistry next year?

4 lines
52.

As you now probably know, I'm not returning next year. Please be sure to keep in touch! We can stay in contact through email/text/insta... whatever works! Is there anything you'd like to share with me before the end of the year? <3

4 lines

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