Law of Conservation of Mass

Front

What is the Law of Conservation of mass?

Back

Mass is never created or destroyed

Front

In a reaction A + B ----> C, reactant A has 5g and product C has 9g. How many grams does reactant B should have? Options: 4g, 5g, 9g, 14g

Back

4g

Front

The number in front of a compound or element is a

Back

Coefficient

Front

The number to the lower side of an element is a

Back

Subscript

Front

Identify the subscripts in the chemical formula: 3Fe₂O₄

Back

2,4

Front

The coefficient in  3H₂O is

Back

3

Front

The Coefficient (3) in the Chemical Formula, 3H₂O, tells you how many _____________ there are.

Back

Molecules of Water

Front

The Subscript (2) in the Chemical Formula, 3H₂O, tells you how many _____________ there are.

Back

Atoms of Hydrogen

Front

How many nitrogen atoms does NH₃ have?

Back

1

Front

Which Chemical Equation is Balanced?
Options: CH₄+O₂------CO₂+2H₂O, H₂+O₂-----2H₂O₄, 4Al+3O₂-----2Al₂O₃

Back

4Al+3O₂-----2Al₂O₃