Chemical equations need to be balanced in order to satisfy the law of

a. molecular changes.

b. conservation of mass.

c. products and reactants.

Which measurement contains a total of three significant figures A) 0.010 B) 0.01 C) 0.01000 D) 0.0100

Which example gives all the necessary information to describe motion scientifically? 1. The baseball player ate a foot-long hot dog. 2. The taxi driver drove 25 mph towards the coast. 3. Sally waited for the doctor for several minutes. 4.

An aluminum atom can lose 3 electrons on order to have a full outer energy level. What charge does the resulting aluminum ion have?

Use valence bond theory to describe the bonding in hydrogen sulfide (H2S). What are the predicted bond angles in hydrogen sulfide?

A solution that is 33.6 % by mass of phenol (C6H5OH) in water is prepared. What is the mole fraction of the phenol?

Read the following passage: The movement of tectonic plates buries a rock deep inside Earth. Intense heat and pressure change the mineral composition of the rock and transform it into Rock A.

What is a change which forms one or more new substances?

Which changes occur as a cadmium atom, Cd, becomes a cadmium ion, Cd2+? (1) The Cd atom gains two electrons and its radius decreases. (2) The Cd atom gains two electrons and its radius increases.

Explain Charles law

2 H2 + O2 → 2 H2O What is the product of this chemical reaction