Which of the followings statements accurately describes renewable energy sources? 1,) they include fossil fuels and hydroelectric power. 2.) they take millions of years to form and should be used responsibly. 3.) they provide the majority of the energy for the united states. 4.) they are found in nearly limitless supply.

Achemistry student needs to standardize a fresh solution of sodium hydroxide. he carefully weighs out of oxalic acid , a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in of distilled water. the student then titrates the oxalic acid solution with his sodium hydroxide solution. when the titration reaches the equivalence point, the student finds he has used of sodium hydroxide solution.calculate the molarity of the student's sodium hydroxide solution. be sure your answer has the correct number of significant digits.

Why is it possible for different microorganisms to extract energy not only from carbohydrates and other biological molecules but from a large variety of substances?

What is the correct lewis dot structure for arsenic?