Under normal conditions, the movement of electrons in metals is

a. random

b. directional

The various atomic masses of the same element are called a. neutrino b. positron c. critical mass d. isotopes

A balloon filled with 39.1 moles of helium has a volume of 876 l at 0.0'c and 1.00 atm pressure. the temperature of the balloon is increased to 38.0'c as it expands to a volume of 998 l, the pressure remaining constant.

A new electricity generating plant wants to avoid using any nonrenewable energy resource to produce electricity. Which energy resource should the plant not use?

1 M NaCl and 1 M HCl are present in an aqueous solution. The solution is : Answer options : (a) Not a buffer and its pH7 (c) A buffer with pH 7

Which term describes this reaction? addition condensation elimination substitution

Mineral oil dissolves in hexane but not in ethanol

Which compound becomes less soluble in water as the temperature of the solution is increased

In 1909 Fritz Haber discovered the workable conditions under which nitrogen, N2 (g), and hydrogen, H2 (g), would combine using to produce ammonia.

How can you classify matter

What type of material can make up a mudflow? a. trees b. boulders c. soil d. all of the above