18 Powdered sulfur is yellow, and powdered iron is gray. When powdered sulfur and powdered iron are mixed at 20°C, the powdered iron

(1) becomes yellow (3) remains ionic

(2) becomes a liquid (4) remains magnetic

Which of the following data does a complete and balanced chemical equation NOT reveal? the molar ratios of each of the reactants and products the states of matter for each reactant and product the correctly written formula for each reactant and

Approximately how much iron would be provided by a balanced diet supplying 2000 kcalories? choose one answer. a. 3 mg b. 6 mg c. 12 mg d. 30 mgthe answer is 12 mg iron would be provided by a balanced diet supplying 2000 kcalories.

X (TRUE FALSE) : A full electron orbital always contains 8 electrons.

If you add 4.00 mL of pure water to 6.00 mL of 0.750 M NaCl solution, what is the concentration of sodium chloride in the diluted solution? A) 0.250 MM B) 1.13 M C) 0.500 M D) 0.450 M E) none of the above

A material that is malleable and conducts electricity is most likely A. wood. B. ice. C. a metal. D. motor oil. Reset Selection

The reaction below has an equilibrium constant kp=2.2*106 at 298 k. 2cof2 (g) ⇌co2 (g) + cf4 (g) calculate kp for the reaction below. cof2 (g) ⇌12co2 (g) + 12cf4 (g)

The electrical conductivities of the following 0.100 M solutions were measured in an apparatus that contained a light bulb as the indicator of conductivity. Rank the solutions in order of decreasing intensity (brightest to dimmest) of the light bulb.

What is the name of a list of elements arranged according to the ease with which they undergo certain chemical reactions?

Why is it harder for the earth to recover from some natural disasters now? A) Human influence may compound the damage. B) The natural disasters have gotten worse. C) This statement is not true.

Heat is most closely related to ___ energy. A. Nuclear B. Electrical C. Thermal