How many kg are in 10 pounds

A molecule has two atoms that are bonded to the central atom and one lone pair of electrons around this central atom. What is the shape of the molecule? bent linear trigonal planar trigonal pyramidal

Both uranium and copper are formed by the process of crystallization. Which of these is a step in the formation of the minerals?

Rank the following atoms in order of increasing electronegativity. Li, Na, H

Strontium consists of four isotopes with masses and their percent abundance of 84. amu (0.5%), 86 amu (9.9%), 87amu (7.0 %), and 88. amu (82.6 %). Calculate the relative average atomic mass of Sr?

How do scientists determine the number of neutrons in an isotope of an atom A. They find the number of protons B. They add the number of electrons and protons C. They divide the atomic mass by two D.

What does average speed mean

What are two types of chemical composition that characterize minerals?

Why is it important that the polymer membrane in a PEM fuel cell allows only protons to move through it? It forces the electrons to move through an external circuit, where they can do work.

Convert 1.65 * 1024 atoms of carbon to moles of carbon.

A metal cylinder holds helium gas at the gift shop. When someone orders a balloon, a small amount of helium is transferred from the tank to the balloon.