Law of Conservation of Mass

Front

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

In a reaction A + B ----> C, reactant A has 5g and product C has 9g. How many grams does reactant B 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

Matter can not be created nor destroyed: it can only be

Back

Transformed, changed

Front

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

Back

4Al+3O₂-----2Al₂O₃

Front

How many nitrogen atoms does NH₃ have?

Back

1

Front

Is this equation balanced or unbalanced? 2Fe₂O₃ + 3C --> 4Fe + 3 CO₂

Back

balanced

Front

How many oxygen atoms are in this chemical formula? Options: 6 oxygen atoms, 2 oxygen atoms, 3 oxygen atoms, 4 oxygen atoms

Back

6 oxygen atoms