What is the standard enthalphy change ΔHo, for the reaction represented above? (ΔHof of C2H2 (g) is 230 kJ mol-1; (ΔHof of C6H6 (g) is 83 kJ mol-1; )

Which of the following is NOT a way to increase the solubility of a solid in water? A crushing the solid shaking the mixture of solid and water raising the temperature of the water letting the mixture stand still a long time

In what direction does an applied force move an object? A. in the opposite direction of the force B. independent of the force C. perpendicular to the force D. in the same direction as the force

What is the mass of 1 mole of carbon dioxide CO2?

How many atoms are in 5.40mol of iron

When the human body perceives internal and external stimuli, it responds to maintain a stable internal environment. What is an example of an internal stimulus within the human body? A) light B) odor C) sound D) thirst

True or False: It is recommended to use sugar cubes to sweeten lemonade because they have a low surface area.

54,000,000 nanometers equals 0.000000054 megameters.

When cream mixes with coffee, is this a chemical or physical change?

A gas occupies 72.1 at stp. At what temperature would the gas occupy 85.9 L at a pressure of 93.6 kPa?

An 80 kg volleyball player lands from a jump and tries to stop her forward motion. The normal contact force exerted by the floor on her shoes is 2000 N. The friction force exerted by the floor on her shoes is 600 N acting backward on the player.