Inorganic compounds which are found in the earth are called: minerals vitamins synthetics cement

Give the ion symbol for the the ion that has 15 protons and 18 electrons

A factor that changes in an experiment from manipulation of the independent variable is the what? a - hypothesis b-constant c-control d - dependent variable

Using an extinction coefficient of 15,000 M-1cm-1, calculate the concentration (in mM) of a molecule with an absorbance value of 0.200. You can assume the standard cuvette pathlength of 1 cm.

An electron in a sodium atom gains enough energy to move from the second shell to the third the sodium atom becomes

Which of the following is true regarding how to calculate net force? A. If forces are acting in the same direction, you can find the net force on an object by subtracting together the strengths of all the individual forces B.

How many moles of oxygen gas are produced from the decomposition of six moles of potassium

Why do magnesium and oxygen combine?

When a chemical reaction takes place, the number of atoms of each element in the reactants

A scientist is measuring the pressure that is exerted by each of the following gases in the atmosphere: carbon dioxide, oxygen, and nitrogen. Which term most likely describes what she is measuring?

How would you expect energy to change during a chemical reaction? A. Energy will be increased. B. Energy will be decreased. C. Energy will be converted into another form. D. Energy will be consumed.