A 500-kg elevator is raised to a height of 10 min 10 seconds. Calculate the power of the motor.

490,000 W

49,000 W

4900 W

490 W

A cabr2 solution has a concentration of 4m. what is the concentration if 2 l of the solution are mixed with 6 l of water?

A single grain of sand occupies a volume of about 0.004 cubic millimeters. Based on your previous answer, how many grains of sand are on Earth's beaches?

For the reaction N2 (g) + 3H2 (g) 2NH3 (g), what will happen if more ammonia gas is added?

A 334-mL cylinder for use in chemistry lectures contains 5.363 g of helium at 23 ∘C. You may want to reference (Pages 404 - 407) Section 10.4 while completing this problem.

How could you dissolve more liquid solute in a saturated solution in a liquid solvent?

An atom that has 84 protons and 86 neutrons undergoes a reaction. At the end of the reaction, it has 82 protons and 84 neutrons. What happened to the atom?

A compound of material formed by a chemical is known as?

Which of these molecules experience london dispersion force?

What happens to the volume of most matter when it is heated?

An aqueous solution is made from a molecular compound rather than from an ionic compound. If some ions are present in solution, which best describes the solute? A. a weak electrolyte B. a nonelectrolyte C. a strong electrolyte D.