Why does a chemical equation need to be balanced to support the law of conversation of matter?

1. Find the percent composition of a compound that contains 1.10 g calcium, 0.888 g sulfur. and 1.76 grams of oxygen in a 3.74 a sample of the compound

10. What is the molarity of a MnO4 - solution if 23.5 mL of this solution is required to react completely with 30.0 mL of 0.134 M Fe2 solution according to the equation 5Fe2 (aq) MnO4 - (aq) 8H (aq) - --> 5Fe3 (aq) Mn2 (aq) 4H2O (l)

What is a molecule that has different kinds of atoms

Which pair of elements are the most different

Zinc metal reacts with hydrochloric acid to produce hydrogen gas and an aqueous solution of zinc (ii) chloride. what is the reducing agent in this reaction? maybe prof. umbridge was right in trying to remove her.

Label each reactant as either a Bronsted-Lowry acid or a Bronsted-Lowry base. a. HF (aq) + H2O (l) - -> H3O + (aq) + F - (aq) HF (aq) ["Bronsted-Lowry acid", "Bronsted-Lowry base"] H2O (l) ["Bronsted-Lowry acid", "Bronsted-Lowry base"] b.

What are three conditions that can cause chemical reactions to occur?

Facts about heat absorption and simple questions about heat absorption with answer

You measure a piece of wood with a meter stick and is it exactly one meter long. How many centimeters long is it?

When salt dissolved in water, what type of change occurs? A) physical only B) chemical only C) physical and chemical