Assuming an experimental value of enthalpy of - 655 kJ/mol and a true value of - 603, what is the percent error of the experiment? Use a calculator and use significant digits in your computation as well as the absolute value of the percentage.

In a chemical reaction, the products are A. the substances that are broken apart or combined in the reaction. OB. the number of atoms of each chemical present in the reaction. C. all of the chemical formulas that are used during the reaction.

Na3PO4 what is this compund name? is it just sodium phosphate?

Most nonmetals form covalent or ionic bonds, depending on the element with which they react. Carbon predominantly forms covalent bonds since it has 4 valence electrons and can form single, double or triple bonds with other elements.

How many electrons are in the lowest occupied energy level in a Group 6A element? a. 2 b. 3 c. 6 d. 7

Which best describes emerging scientific ideas?

A rock has 12.5 percent of its original amount of potassium-40 remaining in it; potassium-40 has a half-life of 1.25 billion years. How long ago was the rock formed? A. 1.25 billion years ago B. 2.5 billion years ago C. 3.75 billion years ago D.

Calcium is an element. What is the smallest particle of calcium that has all the chemical properties of calcium?

Which is the best term to use when describing the energy of motion

The pka of hypochlorous acid is 7.530. a 54.0 ml solution of 0.114 m sodium hypochlorite (naocl) is titrated with 0.337 m hcl. calculate the ph of the solution

An atom has no overall charg if it contains equal number of