Energy released in a chemical reaction come somewhere that is contained in a chemical what

How do you tell by the formula that an element on the periodic table is a metal

The theoretical yield of Cl2 from certain starting amounts of MnO2 and HCl was calculated as 60.25 g and 65.02 g, respectively. If the percentage yield of Cl2 is 72%, what is its actual yield?

Separation technique used to separate mud and water without heating

Why the solids particles cannot diffuse but gas particle can diffuse

Americium-241 is used in smoke detectors. it has a first order rate constant for radioactive decay of k=1.6*10-3yr-1. by contrast, iodine-125, which is used to test for thyroid functioning, has a rate constant for radioactive decay of k = 0.

When paper turns yellow-brown upon exposure to sunlight, what type of change is likely taking place?

What are two beneficial uses of ultraviolet rays

If 1000. mL of linseed oil has a mass of 929 g, calculate the density of linseed oil.

Why is pure water not a conductor of electricity? A. Pure water has no free ions. B. Pure water has many dissolved solids. C. Pure water has few dissolved solids. D. Pure water has many free ions.

Why do the pH scale generally range from 0 to 14 in aqueous solution?