These items concern safety in the Determination of an Equilibrium Constant Experiment. (Select all that apply.) (a) Which of the following are hazardous properties of nitric acid? It's highly flammable. It's a potent carcinogen (causes cancer). It's corrosive. It's basic. It's an oxidant. It's a teratogen (causes birth defects). (b) Which of the following are hazardous properties of sodium thiocyanate? It's a teratogen (causes birth defects). It's highly flammable. It's an irritant. It's acidic. It's basic. It's a potent carcinogen (causes cancer). It's toxic. (c) If any of the solutions in this experiment are spilled on skin or clothing, what is the first thing to do? Flush the area with water. Clean up any spills on the floor or at your lab bench. Go to the TA and tell him/her about the spill. Neutralize the chemical with sodium thiosulfate solution.

The earth's moon is unusually large. two popular theories of the moon's origin include the "sister world" hypothesis, which states that the moon formed from the same materials as the earth, near enough to the earth that they fell into orbit around each other. a second theory is the "capture" hypothesis, in which the moon formed elsewhere in the solar system, and the earth's gravity pulled it into its orbit. studies of what the moon is made of indicate that some of its materials had to come from the earth or from the same area of the solar system where the earth had formed. at the same time, the moon does not contain much of the material that makes up the earth's core, so the moon could not have formed from the same materials as the earth. how do the two facts above affect the described theories of the moon's origin? a. they show that scientists will never agree on where the moon came from. b. they show that more experiments on moon formation need to be done. c. they show that no theory accounts for the existence of the moon. d. they show that neither theory is complete and entirely correct.

Many reactions take place in aqueous solution. when potential reactants are mixed, a reaction will occur if there is some driving force that favors the formation of products. it is often convenient to categorize reactions in terms of these driving forces: precipitate formation, in which an insoluble solid is formed, weak electrolyte formation, as in a neutralization reaction involving water, or transfer of electrons, as in a redox reaction. these reactions can be represented by full molecular equations, which contain all species in the reaction mixture, or by net ionic equations, which show only the species that actually undergo a change. the latter does not contain the spectator ions, which do not undergo a net change or do not take part in the reaction. part a when the following two solutions are mixed: k2co3(aq)+fe(no3)3(aq) the mixture contains the ions listed below. sort these species into spectator ions and ions that react. drag the appropriate items to their respective bins. view available hint(s) spectator ions ions that react part b what is the correct net ionic equation, including all coefficients, charges, and phases, for the following set of reactants? assume that the contribution of protons from h2so4 is near 100 %.ba(oh)2(aq)+h2so4(aq)→ express your answer as a chemical equation. view available hint(s) nothing provide feedback

Avariable that is not being directly tested during an experiment should be changed varied experimented controlled