ACS Review #1

Based on the figure, what volume should be reported for the liquid?

• 20.8 mL

• 20.68 mL

• 20.6 mL

• 20.57 mL

What is the name of Ti₃(PO₄)₄

• titanium phosphate

• titanium(III) phosphate

• titanium(IV) phosphate

• titanium tetraphosphate

Which atom has the most neutrons?

• neon-20

• phosphorous-32

• chlorine-35

• sulfur-35

Lithium has two naturally occurring isotopes, ⁶Li and ⁷Li, with masses of 6.015 amu and 7.016 amu, respectively. What is the relative abundance of each isotope?

• ⁶Li = 7.49%

  and

  ⁷Li = 92.51%

• ⁶Li = 25.31%

  and

  ⁷Li = 74.69%

• ⁶Li = 46.16%

  and

  ⁷Li = 53.84%

• ⁶Li = 92.51%

  and

  ⁷Li = 7.49%

What is the wavelength of a photon with an energy of 6.51 x 10^-19 J?

• 3.05 x 10^-9 nm

• 305 nm

• 1 x 10¹⁵ nm

• 4.52 x 10²⁶ nm

Tags

NGSS.HS-PS4-1

The first three ionization energies of an element X are 590, 1145, and 4912 kJ⋅mol^-1. What is the most likely formula for the stable ion of X?

• X⁺

• X²⁺

• X³⁺

• X^-

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the valence electron configuration for the element in Period 5, Group 3A?

• 5s²5p¹

• 3s²3p⁵

• 3s²3p³

• 5s²3p³

Tags

NGSS.HS-PS1-1

How many moles of hydrogen atoms are in six moles of Ca(OH)₂?

• 2

• 6

• 8

• 12

Tags

NGSS.HS-PS1-7

What is the empirical formula for a compound that is comprised of 54.0% sodium, 8.50% boron, and 37.5% oxygen by mass?

• Na₂B₂O₃

• Na₃BO₃

• Na₃B₂O₂

• Na₄BO₄

What is the coefficient for ZnO when the reaction is balanced with smallest whole number coefficients?

__ ZnS + __ O₂ → __ ZnO + __ SO₂

• 1

• 2

• 3

• 4