What is the percent by mass of chlorine in NaCi? total mass of element in compound molar mass of compound Use %Element x 100

R-12 should be recycled instead of vented to the atmosphere because A. recycling companies offer large financial incentives. B. it has been proven to deplete the Earth's ozone layer. C. R-12 is expensive. D. R-12 is unstable.

Is albinism a dominant or recessive trait

What does AS< 0 mean in a reaction? A. The reaction was exothermic. B. The reaction increased in order. C. The reaction is at equilibrium. D. The reaction was endothermic.

Because Kevin is so strong, he is able to move the crate in 10 seconds. How much power, in watts, does he use?

Which of the following pairs of elements could possibly be in the same group on the periodic table? A forms a 1 + ion; B forms a 1 - ion. A has an atomic number 15; B forms a 3 - ion. A tends to form a 2 + ion; B tends to gain two electrons.

How many protons electrons and neutrons does 13C contain

Are all individuals in a population of animals or a population of plants identical

What is the valency of rhodium

If you were given 10.0 mL of 2.0 M H3X, how many milliliters of 2.0 M NaOH would it take to completely neutralize the acid?

What are some solid mixtures in a classroom