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Q 1/30
Score 0
What is the mass of 1 mole of water (H2O)?
30
10 grams
20 grams
18 grams
15 grams
Q 2/30
Score 0
How many moles of NaCl are present in 117 grams of NaCl?
30
0.5 moles
2 moles
1 mole
3 moles
30 questions
Q.
What is the mass of 1 mole of water (H2O)?
1
30 sec
Q.
How many moles of NaCl are present in 117 grams of NaCl?
2
30 sec
Q.
What is the volume of 1 mole of an ideal gas at standard temperature and pressure (STP)?
3
30 sec
Q.
How many grams are in 0.5 moles of carbon dioxide (CO2)?
4
30 sec
Q.
What is the empirical formula of a compound if its molecular formula is C6H12O6?
5
30 sec
Q.
How many molecules are there in 2 moles of oxygen gas (O2)?
6
30 sec
Q.
What is the number of moles in 88 grams of carbon dioxide (CO2)?
7
30 sec
Q.
How many grams of hydrogen gas (H2) are produced when 2 moles of water (H2O) undergo electrolysis?
8
30 sec
Q.
What is the empirical formula of a compound with the molecular formula C4H10?
9
30 sec
Q.
If 16 grams of methane (CH4) are burned completely in oxygen, how many grams of carbon dioxide (CO2) are produced?
10
30 sec
Q.
If 18 grams of water is decomposed, how many moles of hydrogen gas are produced?
11
30 sec
Q.
12
30 sec
Q.
What volume of oxygen gas at standard temperature and pressure (STP) is required to completely react with 4 moles of hydrogen gas?
13
30 sec
Q.
14
30 sec
Q.
What is the mass of 2 moles of helium gas (He)?
15
30 sec
Q.
What is the empirical formula of a compound that contains 40% carbon, 6.7% hydrogen, and 53.3% oxygen by mass?
16
30 sec
Q.
17
30 sec
Q.
What is the theoretical yield in grams of water produced when 2 moles of hydrogen gas react with excess oxygen gas?
18
30 sec
Q.
What is the molarity of a solution containing 4 moles of solute in 2 liters of solution?
19
30 sec
Q.
How many grams of sodium chloride (NaCl) are required to make 0.5 moles of the compound?
20
30 sec
Q.
How many molecules are there in 2 moles of water?
21
30 sec
Q.
What is the molar mass of carbon dioxide (CO2)?
22
30 sec
Q.
What volume does 1 mole of an ideal gas occupy at standard temperature and pressure (STP)?
23
30 sec
Q.
If 4 grams of hydrogen gas (H2) react with excess oxygen, how many grams of water (H2O) are produced? (Molar mass of H2 = 2 g/mol, H2O = 18 g/mol)
24
30 sec
Q.
What is the empirical formula of a compound that contains 40% carbon, 6.7% hydrogen, and 53.3% oxygen by mass?
25
30 sec
Q.
How many grams of NaCl are required to prepare 500 mL of a 1 M NaCl solution? (Molar mass of NaCl = 58.44 g/mol)
26
30 sec
Q.
If you have 0.25 moles of a gas at room temperature and pressure (RTP), which volume does it occupy? (1 mole of gas occupies 24 L at RTP)
27
30 sec
Q.
In a combustion reaction, 2 moles of propane (C3H8) react with excess oxygen to produce how many moles of carbon dioxide? (Balanced equation: C3H8 + 5O2 -> 3CO2 + 4H2O)
28
30 sec
Q.
What is the concentration in mol/L (Molarity) of a solution prepared by dissolving 10 grams of NaOH in enough water to make 0.5 L of solution? (Molar mass of NaOH = 40 g/mol)
29
30 sec
Q.
How many liters of hydrogen gas (H2) at STP are required to react with nitrogen gas to produce 11.2 liters of ammonia (NH3)? (Balanced equation: N2 + 3H2 -> 2NH3)
