3a LOCOM and Reaction Types

Matter can not be created or destroyed is

• the law of conservation of mater

• law of conservation of energy

• not true, you can destroy matter

• no true, you can both create and destroy matter

The coefficient in  3H₂O is

• 6
• 2
• 3
• 5

Which of the following are Subscripts in this Chemical Formula: 3Fe₂O₄

• 3,4

• 3,2

• 2,4

• 6

How many nitrogen atoms does NH₃ have?

• 1
• 2
• 3
• 4

How many oxygen atoms are in this chemical formula?

• 6 oxygen atoms

• 2 oxygen atoms

• 3 oxygen atoms

• 4 oxygen atoms

Which Chemical Equation is Balanced?

• Fe₄+O₂------4FeO₂+O₂

• 2H₂+O₂-----2H₂O

• 3Cr+4O₂-----2Cr₂O₃

Which Chemical Equation is Balanced?

• 4O₂ + 2H₂ + S₂------ 2H₂SO₄

• 4H₂+O₂-----2H₂O₂

• 3Cr+4O₂-----2Cr₂O₃

How many Sodium (Na) are in 6NaCl?

• 1
• 12
• 6

Which side of a chemical equation os the product side?

• Left (before the yields sign)
• Right (after the yields sign)

In a reaction A + B ----> C.

Reactant A has 5g and product C has 9g.

How many grams does reactant B should have?

• 4g

• 5g

• 9g

• 14g