Which organisms use cellular respiration as a way to convert energy into usable form?

What energy is it when you flip on a switch on a lamp

If you burn 46.6 g of hydrogen and produce 416 g of water, how much oxygen reacted

Which of the following best describes technology a. something created for only scientists to use b. the method of thinking that scientists use. c. the application of engineering to create useful products. c. a scientific idea