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?

11/26/19

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

11/24/19

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

11/18/19

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)

11/18/19

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

11/18/19

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)

11/17/19

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

11/16/19

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)?

11/14/19

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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