391,292 students have used Clutch for Chem
97% got a better grade
2,784 minutes of Chemistry videos

21 Video Solutions

What is the value of the equilibrium constant at 500 °C for the formation of NH3 according to the following equation?

N2(g) + 3 H2(g) ⇌ 2 NH3(g)

An equilibrium mixture of NH3(g), H2(g), and N2(g) at 500 °C was found to contain 1.35 M H2, 1.15 M N2, and 4.12 × 10−1 M NH3.

Watch Solution

Convert the values of Kc to values of KP or the values of KP to values of Kc.

(a) Cl2(g) + Br2(g) ⇌ 2BrCl(g)              K c = 4.7 × 10−2 at 25 °C

Watch Solution

Barium crystallizes in a body-centered cubic unit cell with an edge length of 5.025 Å

(b) Calculate the density of barium.

Watch Solution

What is the freezing temperature of a solution of 115.0 g of sucrose, C 12H22O11, in 350.0 g of water, which freezes at 0.0 °C when pure?

(a) Outline the steps necessary to answer the question.

(b) Answer the question.

Watch Solution

At 0 °C and 1.00 atm, as much as 0.70 g of O can dissolve in 1 L of water. At 0 °C and 4.00 atm, how many grams of O2 dissolve in 1 L of water?

Watch Solution

Which of the period 2 homonuclear diatomic molecules are predicted to be paramagnetic?

Watch Solution

Is the Cl2BBCl2 molecule polar or nonpolar?

Watch Solution

Write a Lewis structure for BF4 .

Watch Solution

Identify the more polar bond in the following pair of bonds: HF or HCl.

Watch Solution

Write the electron configuration for  Sn2+.

Watch Solution

Write the electron configuration for  O2–.

Watch Solution

Photons of infrared radiation are responsible for much of the warmth we feel when holding our hands before a fire. These photons will also warm other objects. How many infrared photons with a wavelength of 1.5 × 10−6 m must be absorbed by the water to warm a cup of water (175 g) from 25.0 °C to 40 °C?

Watch Solution

What is the limiting reactant when 1.50 g of lithium and 1.50 g of nitrogen combine to form lithium nitride, a component of advanced batteries, according to the following unbalanced equation?

Li + N2 ⟶ Li3N

Watch Solution

A mordant is a substance that combines with a dye to produce a stable fixed color in a dyed fabric. Calcium acetate is used as a mordant. It is prepared by the reaction of acetic acid with calcium hydroxide.

2CH3CO2 H + Ca(OH)2 ⟶ Ca(CH3CO2)2 + 2H2O

What mass of Ca(OH)2 is required to react with the acetic acid in 25.0 mL of a solution having a density of 1.065 g/mL and containing 58.0% acetic acid by mass?

Watch Solution

Balance the following equations:

(a) PCl5(s) + H2O(l) ⟶ POCl3(l) + HCl(aq)


Watch Solution

A throat spray is 1.40% by mass phenol, C6H5OH, in water. If the solution has a density of 0.9956 g/mL, calculate the molarity of the solution.

Watch Solution

A 55-kg woman has 7.5 × 10−3 mol of hemoglobin (molar mass = 64,456 g/mol) in her blood. How many hemoglobin molecules is this? What is this quantity in grams?

Watch Solution

Calculate the molar mass of each of the following compounds:
(d) silver sulfate, Ag2SO4 

Watch Solution

Many chemistry conferences have held a 50-Trillion Angstrom Run (two significant figures). How long is this run in kilometers and in miles? (1 Å = 1 × 10−10 m)

Watch Solution

A very good 197-lb weight lifter lifted 192 kg in a move called the clean and jerk. What was the mass of the weight lifted in pounds?

Watch Solution

The distance between the centers of the two oxygen atoms in an oxygen molecule is 1.21 × 10−8 cm. What is this distance in inches?

Watch Solution