The molar mass of boron atoms in a natural sample is 10.77 g/mol. The sample is known to consist of 10B (molar mass 10.013 g/mol) and11B (molar mass 11.093 g/mol). What is the percentage abundance of10B? Answer in units of %

Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.)

Why is soap used to remove grease? a. its nonpolar end dissolves the grease. b. it makes the water bond with the grease. c. it chemically bonds with the grease. d. its polar end dissolves the grease. correct answer for apex - a, its nonpolar end dissolves the grease.

What three things determine the shape and size of a puddle when water is poured out onto a surface