What happens during midwinter when the North Pole is tilted away from the Sun? A) There is no night. B) The days are very long. C) The days are very short. D) There is no sun at all.

What is the molarity of ZnCl2 that forms when 20.0 g of zinc completely reacts with CuCl2 according to the following reaction? Assume a final volume of 255 mL. Zn (s) + CuCl2 (aq) →ZnCl2 (aq) + Cu (s)

If the products in a chemical equation include h2o, what specific type of reaction is occuring? Is a polymer being made or broken down in this equation?

What is an example of chemical change

Ethyl chloride (c2h5cl) boils at 12∘c. when liquid c2h5cl under pressure is sprayed on a room-temperature (25∘c) surface in air, the surface is cooled considerably.

Which statement is true about electronegativity? A. The size of an atom and the number of valence electrons determine an atom's electronegativity. B. Electronegativity increases as the number of protons in an atom decreases. C.

Which must be the same when comparing 1 mol of oxygen gas, O2, with 1 mol of carbon monoxide gas, CO? A. the mass B. the volume C. the number of molecules D. the number of oxygen atoms

List three quantum numbers you know

Electronegativities of the elements Na, Al, P, and Cl follow a specific trend across the period. Based on this trend, an electron will be most strongly attracted to A) Na / B) Al / C) P / D) Cl.

Compare and contrast of cotton balls and pine cone

Which of the following equation does not obey law of conservation of mass? CH4 + 2O2à CO2 + 2H2O Zn + HCl à ZnCl2 + H2 Zn + H2SO4à ZnSO4 + H2 Na + HCl à NaCl + H2