Which of the following requires the most input of energy?

A. melting a substance

B. raising the temperature of the substance by 1° C

C. decreasing the temperature of the substance by 1° C

D. vaporizing a substance

Thomson's experiments were significant in that they questioned A. whether matter is made up of atoms. B. whether the atom has a positive or negative charge. C. whether atoms will form compounds with other atoms. D.

The [H₃O+] of a solution is 1 * 10⁻⁸. This solution has a pH of

A formula that shows how many atoms of each element a substance contains is called a (n) _ O A. ionic formula O B. molecular formula O C. structural formula O D. empirical formula

A student sets up a reaction and calculates a possible yield of 55.9g of silver. If the student preforms the reaction and the mass of actual silver obtained is 42.5g, what is the percent yield?

Which are the primary causes of acidic deposition? radon gas and fuel wood smoke soil dust and sand carbon monoxide and formaldehyde tropospheric ozone sulfur and nitrogen oxides?

The same amount of energy is required to remove each electron sequentially from an atom. A. TrueB. False

Crude oil may contain hundreds of different types of hydrocarbons. Some examples include: Butane (C4H10) Dodecane (C12H26) Octane (C8H18) Benzene (C6H6) Many common fuels, such as gasoline and kerosene, are combinations of these substances or others.

What will happen if the concentration of water inside a cell is higher than the concentration of water outside a cell?

During a lab, you heat 1.04 g of a niso4 hydrate over a bunsen burner. after heating, the final mass of the dehydrated compound is 0.61 g. determine the formula of the hydrate and also give the full name of the hydrate.

Which molecule is a source of energy, a store of energy, and can mix with water?