388 Answered Questions for the topic AP chemistry

What is electron affinity?

What is first ionization energy?

What is first ionization energy?

What is a mass spectrum?


For many purposes we can treat ammonia NH3 as an ideal gas at temperatures above its boiling point of -33 degrees celsius.

Suppose the temperature of a sample of ammonia gas is raised from -14.0 °C to 21.0 °C, and at the same time the pressure is changed. If the initial pressure was 6.5 atm and the volume increased by... more


Consider the following balanced reaction. HCl (aq) + KOH (aq) → H2O (l) + KCl (aq)

In a beaker, 250.0 mL of 0.25 M HCl and 200.0 mL of 0.40 M KOH are mixed. After reaction, is the solution acidic, neutral, or basic? What is the pH of the solution at the end of the... more


What volume (in mL) of 4.46 M HCl is required to fully react with 19.3 mL of 2.13 M Ca(OH)2?

Consider the following balanced equation.2HCl (aq) + Ca(OH)2 (aq)  2H2O (l) + CaCl2 (aq)


Calculate the amount of heat absorbed (in kJ) when 35.15 g of CO2 reacts.

2Fe3O4 (s) + CO2 (g)  3Fe2O3 (s) + CO (g)     H = 47.2 kJ


If 1.49 grams of NO react, how many grams of NO2 form?

Consider the following balanced reaction.2H+ (aq) + 2NO3- (aq) + NO (g)  3NO2 (g) + H2O (l)


Why does Kr have larger radius than Ar when Kr has a larger effective nuclear charge?

Looking at the atomic radius trend of the periodic table, Kr has a larger radius than Ar. But my textbook claims that Kr has a larger effective nuclear charge than Ar for n=3. Wouldn't that mean Kr... more


Consider the following balanced chemical equation: 2K3PO4 (aq) + 3MgBr2 (aq) ----> Mg3(PO4)2 (s) + 6KBr (aq)

A 97.17 mL sample of 1.4 M K3PO4 is mixed with 45.24 mL of 0.615 M MgBr2. After reaction, what is the concentration of the excess reactant (in M)?


Hydrogen chloride gas and oxygen react to form water vapor and chlorine gas. What volume of water would be produced by this reaction if 7.7 cm^3 of hydrogen chloride were consumed?

Answer has a unit symbol, and is rounded to the correct number of significant digits.
1 3 4 5 6 7 16

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