4. A gram of salt can be dissolved in 100 ml of water. What factors affect the solubility?
a. Amount of solute
b. Amount of solvent
c. Size of solute
d. Manner of stirring

Which of the following pairs of elements belong to the same groupa. h and he b. li and bec. c and pb d. ga and ge

Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.

What is true for a substance that releases energy