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Chemical Formulas

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How many total atoms are in this chemical formula?

9

How many total atoms in this chemical formula?

42

What is the coefficient in this chemical formula?

coefficient:3

How many total atoms in this chemical formula?

52

Identify what evidence of a chemical reaction is shown in the picture.

unexpected color change

What is the Law of Conservation of Mass?

Matter cannot be created or destroyed

What is NaHCO3 (Baking Soda) made up of?

1 sodium, 1 hydrogen, 1 carbon, 3 oxygen

What elements are in this chemical formula?

Potassium (K) Carbon (C) Oxygen (O)

What elements are in this chemical formula?

Zinc (Zn) Sulfur (S) Oxygen (O)

Is this chemical equation balanced or unbalanced?

Balanced

Chemical reactions that release energy are called __________.

Exothermic

If there is no subscript, there is ______ atom(s) of that element.

1

Identify the evidence of a chemical change in this reaction.

Formation of a gas, bubbles

The coefficient tell us what about the chemical formula?

how many compounds there are

What are the subscripts in this chemical formula?

Mg= 1 Cl=2

How many Nitrogen atoms are in this chemical formula?

12

2 is a coefficient or subscript?

subscript

Identify what evidence of a chemical reaction is shown in the picture.

Precipate Formed

What part of a chemical reaction is number 2?

Products

Which is the correct formula for: three hydrogen (H) one sulfur (S) four oxygen (O):

H3SO4

How many total atoms does this chemical formula have?

13

Is this chemical equation balanced or unbalanced?

unbalanced

What part of a chemical reaction is number 1?

Reactants

How many total atoms in this chemical formula?

21

What is Mg(NO3)2 made up of? Include elements and number of them.

1 Magnesium 2 nitrogen's 6 oxygens

How many Potassium atoms are in this chemical formula?

8

Chemical changes that absorb energy are called __________.

Endothermic reactions

How many oxygen atoms are in this chemical formula

36