You should pour water into acid.

A change of 1 pH unit represents a one hundred fold change in the acidity of the solution

pH is the measure of how acidic or basic a solution is

A pH above 7 is basic and a pH below 7 is acidic.

Endothermic reactions will always drop in temperature

In an exothermic reaction the system gains energy in the form of heat.

Endothermic reactions absorb energy from the surroundings

In the following equation, which of these is a reactant that is dissolved in water? Cu(s) + AgNO3(aq) → Ag(s) + Cu(NO3)2(aq)

We balance equations because:

In the reaction 2H2 + O2 → 2H2O, what is the mole ratio of oxygen to water?

For the reaction C + 2H2 → CH4, how many moles of hydrogen are required to produce 10 mol of methane, CH4?

For the reaction 2Na + 2H2O → 2NaOH + H2, how many grams of NaOH are produced from 3.0 mol of water?

For the reaction Pb(NO3)2 + 2KI → PbI2 + 2KNO3, how many moles of PbI2 are produced from 300. g of potassium iodide?

For the reaction 2Na + Cl2 → 2NaCl, how many grams of NaCl can be produced from 500. g of chlorine?

Which reactant controls the amount of product formed in a chemical reaction?

What is the ratio of the actual yield to the theoretical yield, multiplied by 100%?

What is the study of the mass relationships among reactants and products in a chemical reaction?

In the following problem, what element is the “known”? For the reaction Pb(NO3)2 + 2KI → PbI2 + 2KNO3, how many moles of PbI2 are produced from 300. g of KI?

According to the kinetic-molecular theory, gases condense into liquids because of

According to the kinetic-molecular theory, which substances are made of particles?

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