30 questions
Is this balanced?
2HgO → 2Hg + O2
Yes
No, Hg is not balanced.
No, O is not balanced.
Is this balanced?
2Al + O2 → Al2O3
Yes
No, O is not balanced.
No, Al is not balanced.
How many atoms of aluminum are on each side of the following equation:
4Al + 3O2 → 2Al2O3
2
6
1
4
How many sodium (Na) atoms are in 6Na2Cl ?
6
12
2
8
How many Oxygen atoms are in 4H2O?
4
1
5
8
How many Oxygen atoms are in
2C2HO4C12
2
6
8
4
Is the equation balanced?
Li + Cl2 → 2LiCl
Yes, all elements balanced.
No, Lithium isn't balanced.
No, Chlorine isn't balanced.
Is the equation balanced?
2Li + Cl2 → 2LiCl
Yes, all elements are balanced.
No, Lithium is not balanced.
No, Chlorine is not balanced.
Is this balanced?
4Al + 3O2 → 2Al2O3
Yes
No, O is not balanced.
No, Al is not balanced.
What are the reactants in this equation?
2H2 + O2 → 2H2O
O2
2H2 + O2
2H2O
2H2
What are the products in this equation?
2H2 + O2 → 2H2O
O2
2H2 + O2
2H2O
2H2
Why does this picture demonstrate the Law of Conservation of Mass?
the number of atoms of each element are the same on both sides
they start out separate and end up combined
the same elements are used
it doesn't demonstrate the Law of Conservation of Mass
The Coefficient (3) in the Chemical Formula, 3H2O, tells you how many _____________ there are.
Atoms of Hydrogen
Atoms of Oxygen
Atoms of Water
Molecules of Water
A jeweler melts gold to make jewelry. As the gold melts, the mass
increases
decreases
stays the same
is destroyed