Law of Conservation of Mass FLASHCARD

Front

The coefficient in  3H₂O is

Back

3

Front

When is a chemical reaction balanced?

Back

Both sides have the same number of atoms

Front

Which chemical equation is balanced? Options: CH₄+O₂------CO₂+2H₂O, H₂+O₂-----2H₂O₄, 4Al+3O₂-----2Al₂O₃

Back

4Al+3O₂-----2Al₂O₃

Front

If reaction starts with 20g of reactants, what is the total mass of products produced?

Back

a total of 20g of products

Front

Which problem is balanced? Options: PbO₂ + 2H₂, SO₂ + H₂0 --> H₂SO₄, 2Na + 2H₂O --> 2NaOH + H₂

Back

2Na + 2H₂O --> 2NaOH + H₂

Front

How many O's are in Al₂(SO₄)₃?

Back

12

Front

Number of H in 3(NH₄)₂CrO₄

Back

24

Front

What does the arrow in a chemical equation (H₂ + O --> H₂O) represent?

Back

Yields

Front

Is this equation balanced or unbalanced? H₂ + O₂ --> H₂O

Back

unbalanced

Front

How many elements does PbNO₃ have?

Back

3