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464 Answered Questions for the topic AP chemistry

Ap Chemistry Math Science

02/05/20

Help me with physics pls

Encke’s comet revolves around the sun in a period of just over three years. The closest it approaches the sun is 4.95 × 10^7 km, at which time its orbital speed is 2.54 × 10^5 km/h. At what... more
Ap Chemistry Chemistry Ap Chem

02/02/20

colligative properties

OS Chapter 11 Items9. Calculate the freezing point of a solution of 400.0 g of ethylene glycol (C2H6O2) dissolved in 600.0 g of water. A) 80.0°C B) -5.5°C C) 20.0°C D) -20.0°C E) 5.5°C Kf =... more
Ap Chemistry Math Chemistry

01/28/20

solution concentration

What is the concentration of magnesium bromide, in ppm, if 133.4 g MgBr2 dissolved in 1.84 L water. then solve for the concentration of bromide in ppm
Ap Chemistry

01/19/20

What is electron affinity?

Ap Chemistry

01/19/20

What is first ionization energy?

Ap Chemistry

01/19/20

What is a mass spectrum?

Ap Chemistry

01/19/20

what does (n=5 to n=2) have to do with wavelength?

Ap Chemistry

01/19/20

What is the relationship between reactivity and ionization energy?

Ap Chemistry Chemistry Chem

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
Ap Chemistry Chemistry Chem

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
Ap Chemistry Chemistry Chem

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)
Ap Chemistry Chemistry Chem

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
Ap Chemistry Chemistry Chem

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)
Ap Chemistry Chemistry Electrons

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
Ap Chemistry Chemistry Chem

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)?
Ap Chemistry Chemistry Chem

11/15/19

A chemist prepares a solution of iron chloride by measuring out 0.10 g of FeCl2 into a 50. mL volumetric flask and filling to the mark with distilled water.

Calculate the molarity of anions in the chemist's solution.
1 2 4 6 7 19

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