Which of these was most important in forming the solar system

A-darkness

B-evaporation

C-cooling

D-gravity

A gas has a temperature of 14 oC and volume of 4.5 liters. If the temperature is raised to 29 oC and the pressure is not changed, what is the new volume of the gas?

Which material is the most dense?

100mg magnesium reacts with 20ml of 1.0M hcl

Geometrically tetrahedral means that the electron groups have what angle? A. 120° B. 180° C. 90° D. 109.5°

A laboratory flask has a valume of 0.750L. What is the valume of this flask in millimeters?

Why do cells have a plasma membrane? A. to separate protein from the nucleus B. to distinguish plants from animals C. to define the size of the cell D. to separate the inside of the cell from its enviroment

Base on its molecular mass, what is the molar mass of iron

For the following reaction in aqueous solution, identify all those species that will be spectator ions. Select all that apply. Na, SO4+Hg (NO3) 2HSO4+2NaNO3 Choose one or more: A. Hg2S04 B. Na2S04 C. Nat D. NO3 E. SO42- F. Hg2 (NO3) 2 G. NaNO3 H.

One mole of which hydrocarbon requires 8 mol o2 to achieve complete combustion to give carbon dioxide and water?

How many bromine atoms are present in 39.9 g of CH2Br2