A substance is 89.2% carbon by mass. how much of the substance would be needed to recover 34.6 mol of pure carbon?

Is a building part of the society or part of the environment? (If buildings are being broken down, is it an environmental or social impact?)

Consider the reaction BF3 + NH3 → F3B-NH3 What changes in hybridization (if any) of the B atom are a result of this reaction? A. Before the reaction boron is sp2 hybridized, and after the reaction it is sp3d hybridized. B.

The henry's law constants for oxygen and nitrogen in water at 0 oc are 2.54 * 104 bar and 5.45 * 104 bar, respectively. calculate the lowering of frezzing pont of water by dissolved air with 80% n2 and 20% o2 by volume at 1 bar pressure.

A solution in a dish contains 4.0 grams of salt dissolved in 100 grams of water. If 50 grams of the water evaporate, this is evidence that the solution is an element an compound an mixture a pure substance

What are the oxidation numbers for CrO4^-2?

What is a possible charge of an anion? +3 -2 0 +1

What is the oxidizing agent in the reaction fe + agno3 fe (no3) 3 + ag?

If the pituitary gland is inhibited, then what stops

Which mass measurement contains four significant figures? 1. 0.086 g 2. 0.431 g 3. 1003 g 4. 3870 g

A main function of a plant's seed is to