Counting Atoms

Front

What is the chemical formula for Ammonium Chromate?

Back

(NH₄)₂CrO₄

Front

How many different kinds of elements are in C₆H₁₂O₆?

Back

3 (Carbon, Hydrogen, Oxygen)

Front

How many atoms of Carbon (C) are in C₆H₁₂O₆?

Back

6

Front

How many Hydrogen atoms are in 4H₂O?

Back

8

Front

How many Oxygen atoms are in Al₂(SO₄)₃?

Back

12

Front

What does the subscript in a chemical formula indicate?

Back

The number of atoms of the element in the molecule.

Front

What is the total number of atoms in C₆H₁₂O₆?

Back

24 (6 C + 12 H + 6 O)

Front

What is the significance of parentheses in chemical formulas?

Back

They indicate that the enclosed atoms are a group that can be multiplied by a coefficient.

Front

How do you determine the number of Nitrogen atoms in (NH₄)₂CrO₄?

Back

Multiply the subscript of Nitrogen (1) by the coefficient (2) to get 2 Nitrogen atoms.

Front

What is the coefficient in a chemical formula?

Back

A number placed in front of a compound to indicate how many molecules are present.