According to the law of conservation of matter, which statement about chemical reactions is true?
atoms are created by some reactions and destroyed by others.
energy is created as atoms are destroyed in chemical reactions.
atoms cannot be created or destroyed by chemical reactions.
every atom destroyed in a chemical reaction must be replaced
Answers: 2
Physics, 22.06.2019 08:50
You are given a vector a = 125i and an unknown vector b that is perpendicular to a. the cross-product of these two vectors is a × b = 98k. what is the y-component of vector b?
Answers: 1
Physics, 22.06.2019 09:30
In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final
Answers: 3
Physics, 22.06.2019 15:30
What is a costume plot? why is it important to a film or theater production?
Answers: 3
Physics, 22.06.2019 17:50
If there's a small amount of friction between two surfaces, the result could be select all that applya. no movement b. heatc. a little bit of movementd. sliding around
Answers: 2
According to the law of conservation of matter, which statement about chemical reactions is true?
History, 12.07.2019 22:30
Mathematics, 12.07.2019 22:30
Mathematics, 12.07.2019 22:30
English, 12.07.2019 22:30
Mathematics, 12.07.2019 22:30
Mathematics, 12.07.2019 22:30
Social Studies, 12.07.2019 22:30
Mathematics, 12.07.2019 22:30
Social Studies, 12.07.2019 22:30
Business, 12.07.2019 22:30
Social Studies, 12.07.2019 22:30
Biology, 12.07.2019 22:30
Biology, 12.07.2019 22:30
Biology, 12.07.2019 22:30
History, 12.07.2019 22:30