Day 4 - Law of Conservation of Mass - EOG Review

Front

The Law of Conservation of matter states that the total amount of matter ______________ after it undergoes change.

Back

stays the same

Front

An oreo cookie weighs 20 grams. It gets crushed into crumbs for a recipe. How much do its crumbs weigh?

Back

20 grams

Front

Law of Conservation of Mass

Back

Mass is never created or destroyed

Front

The coefficient in  3H₂O is

Back

3

Front

Identify the subscripts in the chemical formula: 3Fe₂O₄

Back

2,4

Front

How many nitrogen atoms does NH₃ have?

Back

1

Front

How many oxygen atoms are in this chemical formula?

Back

6 oxygen atoms

Front

Which Chemical Equation is Balanced? Fe₄+O₂------4FeO₂+O₂, 2H₂+O₂-----2H₂O, 3Cr+4O₂-----2Cr₂O₃

Back

2H₂+O₂-----2H₂O

Front

Which Chemical Equation is Balanced?
1. 4O₂ + 2H₂ + S₂------ 2H₂SO₄
2. 4H₂+O₂-----2H₂O₂
3. 3Cr+4O₂-----2Cr₂O₃

Back

4O₂ + 2H₂ + S₂------ 2H₂SO₄

Front

How many Sodium (Na) are in 6NaCl?

Back

6