In general, what determines whethera substance is considered
to be a solid, liquid or a gas?
A. the color of the substance
B. the volume of the substance
C. the arrangement and movement of the
particles in the substance
D. where the substance is found on Earth

Layers of rock containing fossils, like the layers illustrated here, are most likely composed of rocks.

Citric acid has a ph between 1 and 3.  it is considered to be aa. weak acidb. weak basec. strong based. strong acid

Magnesium is the limiting reactant in this experiment. calculate the theoretical yield of mgo for each trial. trial 1: trial 2: data mass of empty crucible with lid trial 1: 26.688 trial 2: 26.681 mass of mg metal, crucible, and lid trial 1: 26.994 trial: 2 26.985 mass of mgo, crucible, and lid trial 1: 27.188 trial 2: 27.180