If element x has 89 protons, how many electrons does it have?

Is the freezing of n-octane an endothermic or exothermic process?

The gas in the piston is at constant temperature. A student increases the pressure on the piston from 2 atm to 3 atm. The observation will be summarized in a row of the incomplete table below. A container has a piston pushing down on it.

What volume does 3.91 moles of nitrogen gas at 5.35 atm and 323 K occupy

A bar of metal has a volume of 4.5 cm3 and a mass of 33 g. What is the density of the metal?

Which particle of an atom has the least mass? A. proton B. nucleus C. neutron D. electron

Rank the following compounds in terms of decreasing vapor pressure. Cl-CH2CH2OH CH3-O-CH3 CH3CH2OH CH3OH

A specific steroid has a λmax of 282 nm and a molar absorptivity ε of 11, 500 L mol - 1 cm - 1. What is the concentration of the compound in a solution whose absorbance at 282 nm is A = 0.060 with a sample pathlength of 1.00 cm?

The chemical formula for a covalently bonded group of atoms is called a

What is the molar mass, in grams, of a mole of an element equal to?

Isopropyl alcohol (C3H8O) is a common solvent used for cleaning and disinfectant purposes. Its mass spectrum is shown below.