Balance the following chemical

equation by providing the correct

coefficients.

[?]Pb (NO3) 2 + [?] Na2Cr04

[?]PbCrO4 + [?]NaNO3

Explain the difference between atomic numbers and atomic mass

A solution contains 2 meq/ml of kcl. if a 20 ml ampule of this solution is diluted to 1 liter what is the percent strength of the resulting solution

Though Neon is a relatively small atom with a relatively high nuclear charge, it is difficult to add an electron to a neon atom. Which of the following is the best explanation of this phenomenon?

What is the name of the branch of science that specifically studies the conversion of chemical energy to electrical energy and vice versa? biochemistry electrochemistry organic chemistry thermodynamics

Frank has a sample of steel that weighs 80 grams. If the density of his sample of steel is 8 g/cm3, what is the sample's volume?

A saline solution contains 1.6 % NaCl by mass. How much NaCl is present in 57.2 g of this solution?

During a laboratory experiment you discover that an enzyme-catalyzed reaction has a delta G of - 20 kcal/mol. If you double the amount of enzyme in the reaction, what will be the delta G for the new reaction

What is the molarity of a hydrochloric acid solution prepared by diluting 200.0 ml of 0.500m hcl to a total volume of 1.00 l?

How does a metallic bond differ from an ionic bond

Give two examples of chemical energy being transformed into electrical energy