Hurnans need fresh, clean water to survive. Which of these statements is true about fresh water? *

An unlimited amount of fresh water is available on Earth,
In some places on Earth, fresh water is being used up faster than it can be replaced
The global population is currently decreasing, and people are using less fresh water,
Fresh water was once considered a renewable resource, but today it is considered an
inexhaustible resource,

Apure solvent has a vapor pressure the vapor pressure of a solution. a. equal to b. lower than c. higher than

If a 12-v battery is connected to a circuit that has a current of 3.0 a, what is the total resistance in the circuit? 36 ohms 4 ohms 0.25 ohms

Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)