Mechanical energy can be changed into heat energy.

True

or

False

Which is a mixture that can be separated most efficiently by the size of its parts? A. Salt water B. Drawer of office supplies C. Cooked noodles and water D. Oil and vinegar salad dressing

Are needed to digest food in the stomach

What happens to the carbon atoms lost during respiration?

Write a balanced half-reaction for the reduction of dichromate ion Cr2O-27 to chromium ion Cr+3 in acidic aqueous solution. Be sure to add physical state symbols where appropriate.

A volcanologist noted that a lahar rushed down a mountain at 32.2 kilometers per hour, south. How far did the mud flow in 17.5 minutes?

At 400 K, the rate of decomposition of a gaseous compound initially at a pressure of 12.6 kPa, was 9.71 Pa s-1 when 10.0 per cent had reacted and 7.67 Pa s-1 when 20.0 percent had reacted. Determine the order of the reaction.

What particles are used to form bonds

Explain how antimony is useful for humans. What is it used for?

Classify these compounds as ionic or molecular. ncl3 nabr

If 3.64g of sand is separated from 5.25g of a mixture of salt and sand what is the percentage of sand in the sample