10 Answered Questions for the topic Chemistry Practice Questions

Chemistry Practice Questions Chemistry Chemistry Lab Chemistry, Homework

10/05/18

very confusing chem question

he following reaction illustrates the decomposition of hydrogen peroxide (H2O2) to form water and oxygen gas:2 H2O2 (l) → 2 H2O (l) + O2 (g)When this reaction is carried out, 0.50 L of O2 gas is... more
Chemistry Practice Questions Chemistry Chemical Reactions Chemistry, Homework

10/05/18

chemistry question

A flask contains a mixture of nitrous oxide (N2O) and oxygen (O2) with partial pressures of 425 torr and 786 torr respectively.What is the ratio of the number of moles of N2O to the number of moles... more
Chemistry Practice Questions

09/09/18

What is full form of RAM and ROM?

Physical chemistry
Chemistry Practice Questions

08/20/18

Which of the following are characteristics of gases?

I. They have a variable shape. II. They are compressible   III. The have a constant volume IV. They have a high viscosity    I and II    I, II, and III   I and IV   II and III   All of... more
Chemistry Practice Questions

08/20/18

Decreasing the temperature of an ideal gas at a constant mass will cause which of the following to decrease?

I: Molar mass II: The volume of the gas III: The density of the gas  IV: The average kinetic energy of the gas V: The pressure of the gas   II, III, and IV   III, IV, and V   I, II, and... more
Chemistry Practice Questions

08/20/18

Decreasing the pressure of an ideal gas at a constant mass and temperature will cause which of the following to increase?

I: The molar mass of the gas II: The volume of the gas III: The density of the gas IV: The average kinetic energy of the gas   I and II   II only    II and III   I and IV   I, II, and IV
Chemistry Practice Questions

08/20/18

A gas sample is confined in a 1 L container. Which of the following will occur if the temperature is increased?

I: The kinetic energy will increase II: The pressure will decrease III: The density of the gas will decrease. IV: The molecular motion will increase.   I only    II only    II and... more
Chemistry Practice Questions

08/17/18

Three saturated solutions have been prepared, all at 25°C.

Solution A has 24g of solid dissolved in 125 mL of water, solution B has 18.5g of solid dissolved in 100 mL of water, and solution C has 41 g of solid dissolved in 200mL of water. Which solution... more
Chemistry Practice Questions

08/17/18

What can be added to a solution containing I-(aq) ions to precipitate the ions from the solution?

1. Sodium chloride    2. Magnesium nitrate    3. Lead (II) nitrate    4. Two of the above    5. All of the above    Im not sure but I think it’s two of the above! 
Chemistry Practice Questions

12/11/17

Which is true of the light emitted from excited hydrogen atoms?

a) the emitted light is comprised of discrete energies/colors b) emitted light is comprised of all colors found in the visible spectrum c) the emitted light is made up of X-rays  d) all of the... more

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