True or false: Hydroelectric power causes no harm to ecosystems.

True

False

Is cotton yarn a natural resource?

Which statement describes a reaction at equilibrium? 1. The mass of the products must equal the mass of the reactants 2. The entropy of the reactants must equal the entropy of the products 3.

A gas is allowed to expand, at constant temperature, from a volume of 1.0 L to 10.1 L against an external pressure of 0.50 atm. If the gas absorbs 250 J of heat from the surroundings, what are the values of q, w, and a 9 AU

State of matter that keeps its shape an volume when it is placed in a different container

In a calorimeter 3.34 kj of heat was absorbed when 10g of ice melted. What is the enthalpy of the fusion of the ice? I know the answer is 334J/g but I don't know how?

How do find the volume of 60.0g of ether if the density is. 70g/mL?

Did the test solution react with the supernatant from the test tube that had the largest amount of precipitate? what can you infer about the molar ratio of this reaction?

Contrast mixtures with pure substances

A standard cell potential of which value describes a spontaneous redox reaction?

Using the combined gas law, if the volume of a gas at 155kPa changes from 22L to 10L. What is the new pressure if the temperature remains constant?