Where does the energy from the sun come from?

A. the force of its own gravity

B. the fusion of hydrogen

C. its iron core

D. the fission of helium

How many atoms and elements are there in C2H5OH

At STP, which 4.0-gram zinc sample will react fastest with dilute hydrochloric acid? (1) lump (3) powdered (2) bar (4) sheet metal

How does ur body maintain constant tempature on a hot day?

How does increased pressures result in the formation of minerals

Of the 20 amino acids, how many amino acids are considered essential? why are they called essential?

Henry Moseley used X-ray experiments to determine the atomic number of elements. How did his discovery contribute to the development of the periodic table? A. It confirmed that elements should be arranged in strict order of increasing atomic mass. B.

Does pollution stay in the city where it originates

Cao (s) + h2o (l) = ca (oh) 2 (s) what mass of slaked lime can be produced from a mixture of 28.4 g of cao and 13.3g of h20

Which best describes the purpose of a controlled experiment describes the purpose of a controlled experiment?

What's the name for the phase change from solid to gas