3. Which is the minimum amount of energy required to start a chemical reaction?

A endothermic energy

B chemical energy

C activation energy

OD exothermic energy

What is the full meaning of CFC

The atomic mass is calculated by adding together which two parts of the atom? A) Protons and neutrons B) Protons and electrons C) Electrons and neutrons D) Elements and protons

After fertilization, female cones become very: sticky light O hard

Which substances can decrease the solubility of CaSO4? how can i identify which substances to use on the solubility table? i suppose my question really is how can i tell if something is decreasing the solubility?

A solution is made by mixing 36. g of heptane (C_7H_16) and 16. g of chloroform (CHCl_3). Calculate the mole fraction of heptane in this sol'. Be sure your answer has the correct number of significant digits.

A molecule from a new organism contains adenine, cytosine, guanine, and thymine. What molecules is being looked at?

In what pH range does phenol red change from yellow to pink

Given the generic chemical reaction below write the rate of the reaction

23 For a reaction at equilibrium, which change can increase the rates of the forward and reverse reactions?

If the formula for potassium chlorate is KClO3 and the formula for magnesium fluoride is MgF2, then what isthe formula for magnesium chlorate?