How do you calculate the percent by mass of an element in a compound?

Why is ethanol added to the reaction mixture of fat and base in the making of soap?

Electroplating is a way to coat a complex metal object with a very thin (and hence inexpensive) layer of a precious metal, such as silver or gold.

How many liters are in 4.5 moles of ne gas at stp

Energy Levels of an atom. Explain.

A 0.200-g sample of cobalt metal reacted with hydrochloric acid according to the following balanced chemical equation: Co (s) + 2 HCl (aq) ➝ CoCl2 (aq) + H2 (g) The volume of hydrogen gas collected over water was 87.

Explain two reasons why we can conclude that the rise of the water in the glass tube is due to root pressure and not transpiration or capillarity

Four type of molecular models

How many particles are in 1 mol of carbon? 1 mol of lithium? 1 mol of eggs? will 1 mol of each of these substances have the same mass?

An organic chemist plans for the synthesis of a complex organic molecule by

Which societal problem can be solved in part by scientist identifying areas of high biodiversity