In a chemical reaction, energy can be A. released. B. absorbed. C. released or absorbed. D. neither released nor absorbed.

How do you write electron configuration? Just use Sulfur as an example

which statement best describes the two tails of a comet? heating by the sun, the comets rotation, gravitational effects of nearby planets, or solar wind

Which sample of matter is a single substance? (1) air (3) hydrochloric acid (2) ammonia gas (4) salt water

Van der waals forces are stronger than chemical bonds. true or false

What is the specific heat of a 42.6 gram compound that changes from 12 Celsius to 46 Celsius when it absorbs 1260 KJ of energy

Name 4 common chemical properties of matter

Why is photosynthesis so important to plants, and can't animals use it?

One way the government of Kim Jong-il controls the lives of the people who live in North Korea is by a. requiring every citizen to vote. b. controlling information its people receive from the outside world. c. enforcing free trade with other nations.

Give reasons 1) copper utensils and sheets become blackish after some days

Predict the spontaneity of a reaction (and the temperature dependence of the spontaneity) for each possible combination of signs for? H and? S (for the system).