Which resources are significantly polluted by heavy metals like mercury? A. soil B. water C. neither A nor B D. both A and B

How many moles of nitrogen, N, are in 76.0 g of nitrous oxide, N2O?

Which rigid cylinder contains the same number of gas molecules at STP as a 2.0-liter rigid cylinder containing H2 (g) at STP? (1) 1.0-L cylinder of O2 (g) (2) 2.0-L cylinder of CH4 (g) (3) 1.5-L cylinder of NH3 (g) (4) 4.0-L cylinder of He (g)

Sodium borohydride, NaBH4, and boron trifluoride, BF3, are compounds of boron. What are the shapes around boron in the borohydride ion and in boron trifluoride?

What does it mean to say that a mineral is inorganic?

Express as ordinary numbers 6.02 x 10^9

Why do the chemical properties cycle through each period? Every eighth element starting with hydrogen restarts the transition from metal to inert gas. Elements with atomic numbers which are multiples of eight start a new period.

Which statement correctly describes the Ka of a weak acid? The Ka is large, and the equilibrium favors products. The Ka is large, and the equilibrium favors reactants. The Ka is small, and the equilibrium favors products.

True or False? The fatal 1930 incident in Muese Valley, Belgium, was associated with leakage of toxic chemicals from a former dump site.

How many moles of neon (Ne, 20.179 g/mol) are in 68.4 grams of neon

A 50.00 mL sample of groundwater is titrated with 0.0300 M EDTA. Of 12.40 mL of EDTA is required to titrate the 50.00 mL sample, what is the hardness of the groundwater in molarity and in parts per million of CaCO 3 by mass