A certain element consists of two stable isotopes, one with mass 10.0129 with an abundance of 19.78%, and the second with mass 11.00931 and an abundance of 80.22%. What is the element?1. O2. B3. Cl4. H

How many molecules of sucrose c12h22o11 are there in 454 grams of sucrose

If a solution is considered basic, then a) the hydroxide ion and hydronium ion concentrations are equal. b) the hydroxide ion concentration is less than the hydronium ion concentration. c) the hydronium ion concentration is greater than the hydroxide ion concentration. d) the hydroxide ion concentration is greater than the hydronium ion concentration.

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.