Which phase changes are exothermic

Which state of matter has atomic spacing that is close together and indefinite shape? which state of matter has atomic spacing that is close together and indefinite shape? liquid solid gas plasma none of the above?

According to the ph scale, what is the approximate ph of acid rain? a. 4.0 b. 4.5 c. 5.0 d. 5.5

Nonelectrolytes fail to ionize or dissociate in water because

Why is granite better then marble for a statue in a city centre

Concentrated sulfuric acid is generally used to promote acid-catalyzed dehydration because:

A student is planning an investigation of an acid-base reaction. Which of the following is not an accepted method of monitoring the progress of the neutralization reaction? Question 16 options: Conductivity meter pH paper Visual indicator

One light year is about 9 trillion kilometers. Arcturus is a star that is 37 light years from earth. If you are about 11 years old now, how old will you be when light that is leaving Arcturus today reaches earth?

What is melted rock and minerals found below earths crust

What do many bases have in common? A. They often release oxygen gas. B. They often form hydrogen ions. C. They often release hydrogen gas. D. They often form hydroxide ions.

What is 3 tenths+4tenths