An unknown substance has a volume of 6.7 cm3 and a mass of 75.7g. What is the density of the substance? If the density of lead is 11.5g/cm3, could the unknown substance be lead?

Elements that do not have full outer electron shells will donate, share, or take electrons from other atoms. choose the items that have the correct binary ionic formula.

Which describes fat? a: a carbohydrate that produces energy b: a nucleic acid that directs cell function c: a lipid that stores energy d: a protein that speeds up a chemical reaction

Anyone who's in connections academy chemistry b have the factors that affect the rate of a reaction portfolio already done?