WorksheetsMidterm Exams
Total questions: 22
Worksheet time: 46mins
Are all things matter?
Yes
No
I don't know
Not enough information
Which of the following is a type of matter?
1
2 & 3
1, 2, & 3
1, 2, 3, & 4
The picture depicts what type of matter?
Element
Compound
Molecule
Mixture
What type of matter has no definite shape and volume
Solid
Liquid
Gas
Aqueous
The reaction type of the balanced equation is
H2SO4 + 2 NH4OH → 2 H2O + (NH4)2SO4
Combustion
Decomposition
Single Displacement
Double Displacement
What type of change is different from the rest?
Salt (NaCl) dissolves in water
Water boils at 373.15 K
Enzymes breakdown food while eating
Paper towel absorbs water
The chemical equation for the statement shown below is
In the process of photosynthesis, plants take carbon dioxide (CO2) in the air and reacts it with water (H2O) from the soil to produce sugars like glucose (C6H12O6) and oxygen gas (O2)
CO2 + H2O → C6H12O6 + O2
C6H12O6 + O2 → CO2 + H2O
CO2 + C6H12O6 → H2O + O2
O2 + CO2 → C6H12O6 + H2O
The number of atoms in 1 mole of carbon is equivalent to the number of molecules in 1 mole of caffeine (C8H10N4O2)
Yes
No
Not enough information
I don’t know, I didn’t study
The ratio of the amount of substance obtained from a reaction to its theoretical amount formed multiplied to one hundred is the
Theoretical yield
Actual yield
Percentage yield
Limiting reagent
Are all reagents reactants?
Yes
No
Not enough information
I don't know
The coefficients to balance the reaction are
_ NaBr + _ H3PO4 → _ Na3PO4 + _ HBr
Coefficients are arranged from left to right
1, 3, 3, 1
1, 3, 1, 3
3, 1, 1, 3
3, 1, 3, 1
What number of particles are there in 0.500 moles C8H8O3?
8.30 x 1025 particles
3.33 x 1024 particles
3.011 x 1023 particles
1.81 x 1024 particles
The amount of moles present in 1.81 x 1024 molecules of CO2
1.09 moles
1.88 moles
3.00 moles
3.98 moles
What is the molecular weight of C5H11NO2S?
121.07 amu
144.11 amu
149.11 amu
194.14 amu
How many grams are there in 0.549 moles Co? (MM: 58.93 g/mol)
0.549 moles
190.5 moles
32.35 moles
150.9 moles
Kim Dahyun will use 2.45 x 1024 molecules of H2SO4 for her nitration reaction of toluene. What is the mass of H2SO4 that she used? (MM: H2SO4 – 98.079 g/mol)
399.026 g
414.810 g
150.428 g
518.641 g
How many atoms of nitrogen atoms are there in 24.3 g of copper (II) hexacyanoferrate (II) Cu2[Fe(CN)6] (MM: 466.13 g/mol)
1.64 x 1023 nitrogen atoms
1.88 x 1023 nitrogen atoms
6.88 x 1023 nitrogen atoms
6.01 x 1023 nitrogen atoms
What is the percent composition of H in Mo2(O2CCH3)4
(MW: H – 1.01 amu; Mo – 95.95 amu ; O – 16 amu; C – 12 amu; Mo2(O2CCH3)4 - 428.06 amu)
0.707%
0.939%
2.83%
1.65%
Caffeine a compound commonly found in coffee and energy drinks contains 49.18% carbon, 5.39% hydrogen, 28.65% nitrogen, and 16.68% oxygen by mass. Determine the empirical formula.
(MM: C – 12 g/mol ; H – 1.01 g/mol ; N – 14 g/mol ; O – 16 g/mol)
C8H10N4O2
C2H4N5O2
C2HNO
C4H5N2O
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CuCl2 + 2 NaNO3 -> Cu(NO3)2 + 2 NaCl
If 10 grams of copper (II) chloride (CuCl2) react with 15 grams of sodium nitrate (NaNO3), how much sodium chloride (NaCl) can be formed?
(Masses - CuCl2: 134.45 g/mol ; NaNO3: 84.99 g/mol ; Cu(NO3)2: 187.56 g/mol ; NaCl: 58.44 g/mol)
10.31 g NaCl
8.69 g NaCl
0.149 g NaCl
0.176 g NaCl
CuCl2 + 2 NaNO3 -> Cu(NO3)2 + 2 NaCl
If 23.99 grams of sodium chloride (NaCl) is formed from the reaction what is the theoretical amount of copper (II) chloride (CuCl2) used?
(Masses - CuCl2: 134.45 g/mol ; NaNO3: 84.99 g/mol ; Cu(NO3)2: 187.56 g/mol ; NaCl: 58.44 g/mol)
27.60 g CuCl2
23.76 g CuCl2
67.21 g CuCl2
63.61 g CuCl2
