Calculate the number of kilojoules to warm 125 g of iron from 23.5 °C to 78.0 °C.

For the reaction? H2 + ? O2 →? H2O, what is the maximum amount of H2O (18.0153 g/mol) which could be formed from 9.43 g of H2 (2.01588 g/mol) and 12.98 g of O2 (31.9988 g/mol) ? Answer in units of g.

Combustion is described as an oxidation reaction. What happens during combustion? Oxygen gas is given off. Oxygen gas burns during the chemical reaction. Oxygen gas decomposes to produce other elements. Oxygen gas combines with other elements.

If there are no chemical controls which can be implemented at your worksite, what can you do to protect yourself? A.) Sue the company B.) Ask someone else to do your job C.) Stop doing your job D.) Wear recommended PPE for protection

Why are there wires in circuits? what is their job/function?

How can you determine an object mechanical energy

Millikan's oil-drop experiment A. established the charge on an electron. B. showed that all oil drops carried the same charge. C. provided support for the nuclear model of the atom. D.

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.