the number below and to the right of an element in a chemical formula. It represents the number of atoms of that element in chemical compound or molecule.

Which of the following pairs of compounds would you expect to form homogeneous solutions when combined? a) CH3CH2CH2CH2CH3 AND CH3CH2CH2CH2CH2CH3 b) CBr4 and H2O c) LiNO3 and H2O d) CH3OH and CH3CH2CH2CH2CH3

The average kinetic energy of 1 mole of a gas at 25 degrees Celsius is:

What is the pH of a solution with [H+]=1.25 x 10^-10

Do you know the answer to this question?

The mass of a sample of sodium bicarbonate is 2.1 kilograms. There are 1,000 grams in 1 kg, and 1 x 10^9 nano-grams in 1 g. What is the mass of this sample in ng?

Select all the statements that are true about electron configurations: A) The electron configuration of an atom describes the energy of electrons in the atom.

Acid is added to a beaker containing crushed marble. what effect does stirring this mixture have on the system?

How many milliliters of 0.200 M NH4OH are needed to react with 12.0 mL of 0.550 M FeCl3? FeCl3 + 3NH4OH Fe (OH) 3 + 3NH4Cl

Based on the law of conversation of mass, how does the mass of reactants compare with the mass of products in a given reaction?

How many moles of sucrose are dissolved in 520 mL of solution if the solution concentration is 0.150 M