An atom of gold has a mass of approximately 3.25×10−22
grams. What is the mass of 4000
atoms of gold? Express your answer in scientific notation.
To find the mass of 4000 atoms of gold, we need to multiply the mass of one atom by 4000.
Mass of 4000 atoms of gold = (3.25 * 10^-22 grams) * 4000
Multiplying these numbers gives:
Mass of 4000 atoms of gold = 13 * 10^-22 grams
However, we can simplify this by moving the decimal point one place to the right and changing the exponent:
Mass of 4000 atoms of gold = 1.3 * 10^-21 grams
Therefore, the mass of 4000 atoms of gold is 1.3 × 10^-21 grams.