A teacher has 12MHCL and needs to make 2.5MHCL for a lab. There are 15 groups and each group need 75ml of the acid. What does the teacher need to do?

The is a particle with one unit of positive charge a. proton b. positron c. electron d. nucleus awnser quick it is a important science test!

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.