What is the volume of 0.2 moles of helium at STP

A student investigated the rate of reaction between sodium thiosulphate and dilute hydrochloric acid the student placed a conical flask over a cross on a piece of paper the student mixed the solutions in the flask the solution went cloudy the

Do you think that the continental plates continue to move across the surface of the earth? what evidence do you have to support this thought

What is the mole ratio of Cl2 to Br2 in the given reaction? Cl2 + 2NaBr → 2NaCl + Br2

The mechanisms of most common reactions consist of two or more elementary steps, each of which describes a single molecular event. True or false?

What chemical processes are used to make artificial sweetener

During an endothermic phase change, what happens to the potential energy and the kinetic energy?

What is the difference between pure substance, element, and compund

Butane gas is used as the fuel in disposable lighters. It burn in oxygen to form carbon dioxide gas and water vapor. What mass of carbon dioxide is produced when 53.3 g of butane is burned in 103.9 g of oxygen

Suppose a solution was too concentrated for an accurate reading with the spectrophotometer. The concentrated solution was diluted by placing 1.00 mL of the concentrated solution in 4.00 mL of water.

What kinds of scientific investagations involve making observations