How

many moles are in 8.5 •10^25

Which of these compounds is most likely to be ionic? select one: a. ncl3 b. bacl2 c. co d. so2 e. sf4?

What is the best definition of chemistry? A. The study of mass, energy, and light B. The study of life and energy C. The study of experiments and theories D. The study of matter, its properties, and its reactions

175 mL of Cl2 gas is held in a flexible vessel at STP. If the vessel is transported to the bottom of the impact basin Hellas Planitia on the surface of Mars where the pressure is 1.

He half-life of carbon-14 is 5730 years. what is the age of a fossil containing 1/16 the amount of carbon-14 of living organisms? explain your calculation.

Having difficulty understanding formulas involved. Determine the quantity (g) of pure CaCl2 in 7.5 g of CaCl2•9H2O.

Which of those molecules are polar. Co2, So2, CH2Cl2, PCl3

A chemical spill gets into the soil and effects the plants within a forested ecosystem. explain why the top predators would be most affected by this

If the heat released during condensation goes only to warming the iron block, what is the final temperature (in ∘C∘C) of the iron block? (Assume a constant enthalpy of vaporization for water of 44.0 kJ/molkJ/mol.)

Which of the following is not a disaccharide? A) sucrose B) maltose C) lactose D) amylose E) all of the above are disaccarides

The process by which a semipermeable membrane allows water molecules, small molecules, and ions to pass through while retaining large particles