Counting atoms in chemical formulas

Front

How many Magnesium atoms are in 10MgCl₂?

Back

10

Front

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

Back

only 1

Front

How many Nitrogen atoms are in (NH₄)₂CrO₄?

Back

2

Front

How many Elements are in the compound C₂H₈O?

Back

3

Front

How many molecules (formula units) are in 10MgCl₂?

Back

10

Front

What does a 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 Carbon + 12 Hydrogen + 6 Oxygen)

Front

In the formula NaCl, how many atoms are present in total?

Back

2 (1 Sodium + 1 Chlorine)

Front

What is the significance of parentheses in chemical formulas?

Back

They indicate that the enclosed atoms are a group that can have a subscript applied to them.

Front

How many Oxygen atoms are in 2H₂O?

Back

2 (2 molecules of H₂O each containing 1 Oxygen)