Math for Chemistry Test Review

Solve for t.

D= rt

• t = D r

• t = D/r

• t = r/D

• none of these are correct

Solve for a.

P = w/a

• a = P w

• a = w/P

• a = P/w

• none of these are correct

Which buttons are for changing modes?

• 2nd

• DRG

• --

• 2nd & DRG

Which button is used for negative numbers?

• 2nd

• DRG

• • --

  • (blue button)

• (-)

  white button

Which button is used for subtraction?

• 2nd

• DRG

• --

  (blue button)

• (-)

  white button

Convert to scientific notation: 520,000,000

• 0.52 x 10⁹

• 52 x 10⁷

• 5.2 x 10⁸

• 5.2 x 10⁷

Write 0.00000707 in scientific notation.

• 707 x 10⁸

• 7.07 x 10⁶

• 7.07 x 10^-6

• 707 x 10⁸

How would you write -5.6 x 10^-3 in standard form

• -0.0056

• 0.00056

• 0.0056

• -5,600

Multiply: (9.4 x 10⁶ )(3.2 x 10⁵ )

Express your answer with the correct number of significant digits.

• 3.8 x 10¹²

• 2.9375 x 10¹

• 30.08 x 10¹¹

• 3.0 x 10¹²

Round 0.010229 to four significant figures

• 0.01023

• 0.1022

• 0.1023

• 0.01022