Which of the following is needed to calculate the density of a substance?
a. weight and volume
b. weight and speed
c. speed and mass
d. mass and volume

12. complete each of the following word equations for synthesis reactions. a. sodium + oxygen -> b. magnesium + fluorine -> 13. complete and balance the equations for the decomposition reactions. a. hgo -> [with the triangle heat symbol above the arrow] b. h2o(l) -> [with "electricity" written above the arrow]

Choose all the answers that apply. as ocean depth increases, temperature decreases temperature increases pressure increases pressure decreases salinity increases density increases

0.09 moles of sodium sulfate in 12 ml of solution