Which equation is not balanced?

A 2Mg (s) + O2 (g) → 2MgO (s)

B 2Mg (NO3) 2 (s) → 2MgO (s) + 4NO2 (g) + O2 (g)

C MgO (s) + HCl (aq) → MgCl2 (aq) + H2O (1)

D Mg (s) + CuSO4 (aq) → MgSO4 (aq) + Cu (s)

A chemist has a certain amount of gas under a pressure of 33.3 atm; it occupies 30.0 L at 273 ◦C. For his research, however, the gas must be at STP. What will the volume if the gas be?

The chemical bonding in sodium phosphate, Na3PO4, is classified as:

Magnesium ribbon reacts vigorously with hydrochloric acid. The test tube gets hot and bubbles are produced. When a metal reacts with an acid in a single replacement reaction, we can expect the production of A.) oxygen gas. B) water vapor.

A second cross was done using a different pair of mice. One parent was a mouse with white fur (bb). The was other parent was a mouse with black fur. Some of the offspring produced this cross had white fur.

1. Acids have relatively high pH compared to water? * true or false 2 which are slippery when cleaning? * bases, solvents, acids or solutions? 3.

Which stament best describes a solution

Which answer accurately describes the difference between speed and velocity? Read each answer choice carefully. Question 4 options: A. If speed is constant, then velocity is also constant. B. Speed requires direction.

Least reactive element of period 3

A chemical formula shows the kind and number of Atoms that form a what? compound, mixture, solution, or suspension

What gas was used as a deadly posiosn in world war 1?