How many atoms of each element are in the formula, Ni(ClO4)2?

Of the reactions below, which one is not a synthesis reaction?

By adding antifreeze to the water in the radiator of a car, you:

To balance a chemical equation, it may be necessary to adjust the

Select the examples in which the names do not correctly match the formulas of the compounds indicated. I PF5 potassium pentafluoride II N2O4 dinitrogen(IV) oxide III XeO4 xenon tetroxide IV Cl2O5 dichlorine pentoxide

Which compound is not a hydrocarbon?

Which of the following have opposite electric charges?

Which element exists as a diatomic molecule in the free state?

Methane gas (CH4) reacts with oxygen gas (O2) according to the equation below. CH4 + 2O2 → CO2 + 2H2O +energy This reaction releases 890 kJ of energy for each mole of methane gas that is consumed.  Which of the following statements best describes this reaction?

In a sealed bottle that is half full of water, equilibrium will be reached when water molecules