Which of the following is true for a dry cell? a) It contains boric acid, which is a solid acid. b) The graphite rod does not undergo reduction, even though it is the cathode. c) It can be recharged many times. d) all of the above

Xco3 enter the group number of x

Which of the following is the correct description of Einstein's equation? a change in mass is related to a change in energy matter can change form during chemical reactions energy and mass are the same particles moving at the speed of light have a

How can i demonstrate that a piece of chalk has mass

The half-life of a radioactive element is 1250 years. What percent of atoms remain after 7500 years?

What changes nitrogen gas in the air to nitrogen compounds that fall to the ground

Do the benefits of medical marijuana justify its legality?

In the reaction C+02 arrow C02 which element is reduced in the reaction? C O2 CO2

Which of the following correctly identifies steps used in the fractional distillation of petroleum? The mixture is cooled, condenses, then heated and boils. The mixture is cooled, boils, then heated and condense.

What is the formula of the most stable oxide of francium?

You just calculated that the heat of fusion for chloromethane is 6400 J/mol. The heat of fusion for hydrogen is 120 J/mol. Which of the following account for this difference? a. Hydrogen has stronger intermolecular forces than chloromethane. b.