Dim Analysis/Sci Notation, etc.

Front

What is the atomic mass of an element?

Back

The atomic mass is the weighted average mass of an element's isotopes, measured in atomic mass units (amu).

Front

Convert 18,000,000,000 to scientific notation.

Back

1.8 \times 10^{10}.

Front

Convert 942.1 \times 10^8 to proper scientific notation.

Back

9.421 \times 10^{10}.

Front

What is Avogadro's number?

Back

Avogadro's number is 6.022 \times 10^{23}, which is the number of representative particles in one mole.

Front

Convert 0.000077 to scientific notation.

Back

7.7 \times 10^{-5}.

Front

What is scientific notation?

Back

Scientific notation is a way of expressing numbers as a product of a coefficient and a power of ten.

Front

How do you convert a large number to scientific notation?

Back

Move the decimal point to the left until only one non-zero digit remains to the left of the decimal, then count the number of places moved to determine the exponent.

Front

How do you convert a small number to scientific notation?

Back

Move the decimal point to the right until only one non-zero digit remains to the left of the decimal, then the exponent will be negative.

Front

What is the significance of Avogadro's number in chemistry?

Back

It allows chemists to count particles by weighing them, as one mole of any substance contains Avogadro's number of particles.

Front

What is the formula for calculating atomic mass?

Back

Atomic mass = (mass of isotope 1 \times abundance) + (mass of isotope 2 \times abundance) + ...