A sample of gas at 300 K has a volume of 2.0 liters. At what temperature will the volume decrease to 1.0 liter if the pressure is kept constant?

A.

600 K

B.

150 K

C.

250 K

D.

650 K

How can you express the concentration of hydrogen and hydronium ions in a solution?

In an electrically neutral atom of any element, there are equal numbers of A) protons and neutrons. B) electrons and protons. C) electrons and neutrons. D) atomic number and atomic mass.

What component of plants makes them green?

A 1.00 liter solution contains 0.49 moles hydrocyanic acid and 0.38 moles sodium cyanide. If 0.19 moles of hydrochloric acid are added to this system, indicate whether the following statements are true or false.

The Bohr model of the atom explained why emission spectra are discrete. It could also be used to explain the photoelectric effect.

A mercury thermometer is used to take four temperatures of a solution

Which of the following systems (i. e., pair of metals) would you expect to exhibit complete solid solubility? Cr-V Mg-Zn Al-Zr

2 How 12.6 Sn + 2 HF - Snf a + H₂ many moles of tin (11) Fluoride will be produced grams of hydrogen fluoride react? if

Select the type of energy involved in each step. You turn on the burner of a gas stove. a) chemical b) thermal c) mechanical d) electrical The gas ignites. a) chemical b) thermal c) mechanical d) electrical The gas warms the water in the pan.

What volume of 0.500 M AgNO3 are needed to react with 100. mL of 0.400 M K2CrO4? 2 AgNO3 (aq) + K2CrO4 (aq) ➔ Ag2CrO4 (s) + 2 KNO3 (aq)