Lanthanum-138 has a half-life of 105 billion years. After 525 billion years, how much of a 240 g sample of this radioisotope will remain?

nevermind, I got 7.5g and was right

The strongest intermolecular interactions between hydrogen sulfide (H2S) molecules arise from: Group of answer choices a) disulfide linkages b) dipole-dipole forces c) hydrogen bonding d) London dispersion forces.

Explain Charles law

An atom changes its oxidation number from + 3 to - 1. Is it oxidized, reduced, or neither?

Water's heat of vaporization is 2,257 joules/gram. How much energy is released when 11.2 grams of water vapor condenses into liquid?

What is the purpose of the cobalt blue glass?

The reaction A (g) ⇌ 2 B (g) A (g) ⇌ 2 B (g) has an equilibrium constant of K = 0.010 K = 0.010. What is the equilibrium constant for the reaction B (g) ⇌ 1 2 A (g) ?

A 0.239 gram sample of a gas in a 100-mL flask exerts a pressure of 603 mm Hg at 14 degrees Celsius. What is the gas?

Which of the following is true about a redox reaction? In a redox reaction, an electron is lost by the reducing agent. In a redox reaction an electron is lost by the oxidizing agent.

Is the equation above balanced? How do you know? Mg + 2HCl → MgCl2 + H2

What characteristics do atoms of carbon-12, carbon-13, and carbon-14 have in common?