1.The limiting reactant in a chemical reaction is the reactant that
A. is used up at the end of the reaction.
B. is left over after the reaction.
C. has the largest number of atoms.
D. has the fewest number of atoms.
2.How many water molecules (H2O) can be produced from 6 molecules of hydrogen gas (purple) reacting with 6 molecules of oxygen gas (turquoise)? Which reactant is the limiting reactant?
A. 6 water molecules, hydrogen is limiting
B. 3 water molecules, oxygen is limiting
C. 3 water molecules, hydrogen is limiting
D. 12 water molecules, oxygen is limiting
3.34 atoms of carbon (C) react with 22 molecules of hydrogen gas (H2). How many molecules of methane (CH4) will be formed, and what will be left over?
A. 17 molecules of methane formed, 5 molecules of hydrogen left over
B. 11 molecules of methane formed, 23 molecules of carbon left over
C. 5 molecules of methane formed, 24 atoms of carbon and 2 molecules of hydrogen left over
D. 22 molecules of methane formed, 12 atoms of carbon left over
4.When aluminum (Al) reacts with chlorine gas (Cl2), aluminum chloride (AlCl3) is produced according to the balanced equation below:
2Al + 3Cl2 -> 2AlCl3
If 20 atoms of aluminum react with 45 molecules of chlorine gas, which reactant is limiting and how many more atoms/molecules would be required to use up all the reactants?
A. Chlorine is limiting, 5 more molecules are needed.
B. Chlorine is limiting, 15 more molecules are needed.
C. Aluminum is limiting, 10 more atoms are needed.
D. Aluminum is limiting, 25 more atoms are needed.
5.According to the following balanced equation, 2 formula units of Iron (III) Oxide (Fe2O3) can be formed by reacting 4 atoms of iron (Fe) with 3 molecules of oxygen gas (O2). If 10 atoms of iron are reacted with 6 molecules of oxygen gas, which is the limiting reactant and how many atoms or molecules will be left over?
4Fe + 3O2 -> 2Fe2O3
A. Iron, 1 molecule O2 remains
B. Iron, 2 molecules O2 remain
C. Oxygen, 4 atoms Fe remain
D. Oxygen, 2 atoms Fe remain
Can anyone help me with these answers? I have a pretty good idea but this will help my grade so I'd like a 100! Thanks!!
A. is used up at the end of the reaction.
B. is left over after the reaction.
C. has the largest number of atoms.
D. has the fewest number of atoms.
2.How many water molecules (H2O) can be produced from 6 molecules of hydrogen gas (purple) reacting with 6 molecules of oxygen gas (turquoise)? Which reactant is the limiting reactant?
A. 6 water molecules, hydrogen is limiting
B. 3 water molecules, oxygen is limiting
C. 3 water molecules, hydrogen is limiting
D. 12 water molecules, oxygen is limiting
3.34 atoms of carbon (C) react with 22 molecules of hydrogen gas (H2). How many molecules of methane (CH4) will be formed, and what will be left over?
A. 17 molecules of methane formed, 5 molecules of hydrogen left over
B. 11 molecules of methane formed, 23 molecules of carbon left over
C. 5 molecules of methane formed, 24 atoms of carbon and 2 molecules of hydrogen left over
D. 22 molecules of methane formed, 12 atoms of carbon left over
4.When aluminum (Al) reacts with chlorine gas (Cl2), aluminum chloride (AlCl3) is produced according to the balanced equation below:
2Al + 3Cl2 -> 2AlCl3
If 20 atoms of aluminum react with 45 molecules of chlorine gas, which reactant is limiting and how many more atoms/molecules would be required to use up all the reactants?
A. Chlorine is limiting, 5 more molecules are needed.
B. Chlorine is limiting, 15 more molecules are needed.
C. Aluminum is limiting, 10 more atoms are needed.
D. Aluminum is limiting, 25 more atoms are needed.
5.According to the following balanced equation, 2 formula units of Iron (III) Oxide (Fe2O3) can be formed by reacting 4 atoms of iron (Fe) with 3 molecules of oxygen gas (O2). If 10 atoms of iron are reacted with 6 molecules of oxygen gas, which is the limiting reactant and how many atoms or molecules will be left over?
4Fe + 3O2 -> 2Fe2O3
A. Iron, 1 molecule O2 remains
B. Iron, 2 molecules O2 remain
C. Oxygen, 4 atoms Fe remain
D. Oxygen, 2 atoms Fe remain
Can anyone help me with these answers? I have a pretty good idea but this will help my grade so I'd like a 100! Thanks!!