What type of reaction is: ch4 + 2o2 → co2 + 2h2o + 218 kcal? an exothermic reaction a combination reaction a decomposition reaction an endothermic reaction a single replacement reaction?

What type of mixture is 100 ml of water with a little bit of salt?

What disease involves a crustacean as a vector

Which are possible consequences of decreasing air quality resulting from global warming? Check all that apply.

Why is burning wood a chemical change?

An atom is a small building block that forms matter. Many different models of an atom have been made over the years. Which of the following is NOT a reason why so many models of the atom have been made? A The atom has changed over the years.

Click the "draw structure" button to launch the drawing utility. Draw the product formed when 2-heptanone (CH3COCH2CH2CH2CH2CH3) is treated with (CH3) 2CHNH2 in the presence of mild acid. 2-Heptanone is partly responsible for the odor of bleu cheese.

How does the goverment control scientific reseach

What happens when an oceanic plate collides with a continental plate? Select one: a. Neither plate moves under the other. b. The continental plate moves under the oceanic plate. c. The oceanic plate moves under the continental plate

Write a short explanation about the "cheater" way to find the # of valence electrons an element has, and explain what valence electrons have to do with elements bonding?

What type of energy is associated with random motion of the particles in a sample of gas