Review 04.20.23

5.21 cm is the same distance as...

• .0521 m

• 52.1 dm

• 5.21 mm

• 0.00521 km

Sig figs are important because they indicate...

• the accuracy of a measurement

• the number of digits on a calculator

• the number of measurements

• the precision of a measurement

Which of the following has the correct number of sig figs associated with the number

• .04300

  5 sig figs

• .00302

  2 sig figs

• 156000

  3 sig figs

• 1.04

  2 sig figs

What type of number is 12 eggs

• counted

• imaginary

• rounded

• known

Which of the following is a noble gas

• Oxygen

• helium

• nitrogen

• Chlorine

What is the correct electron configuration for Lithium?

• 1s²

• 1s²2s²

• 1s²2s¹

• 1s²2s³

What is the correct name for N₂O₃?

What is the correct formula for aluminum nitrite?

• Al₂(NO₂)₂

• Al₂(NO₂)₃

• Al₁(NO₂)₃

• Al₃NO₂

A 25.0 mL sample of H₃PO₄ requires 50.0 mL of 1.50 M NaOH for complete neutralization. What is the molarity of the acid?

• .333 M

• 3.00 M

• 1.50 M

• 1.00 M

The K_a for HF is 7.2 * 10^-4 this means that HF is what?

• strong acid

• strong base

• weak acid

• weak base