38 An aluminum sample has a mass of 80.01 g and a density of 2.70 g/cm3. According to the data, to what number of significant figures should the calculated volume of the aluminum sample be expressed? (1) 1 (3) 3

(2) 2 (4) 4

which object would have more potential energy a bowling ball stored on a high shelf in a closet or a baseball on the same shelf? why? which one would you rather fall on your head

From which type of clouds do hail pallets form

What is the relationship between groundwater and surface water? A Surface water percolates through the soil to form groundwater. B There is no relationship between surface and groundwater; they form independently.

How does nuclear fission differ from nuclear fusion? Why are both of these processes exothermic?

1. For HF and HBr, the partial positive charge on H atom is 0.29 and 0.09, respectively. Use electronegativities (EN) to explain why the partial charge on H in HF is more positive than the partial charge on H in HBr.

Choose the statement below that is TRUE. A solution will form between two substances if solute-solvent interactions are of comparable strength to the solute-solute and solvent-solvent interactions.

When liquid silver nitrate and liquid sodium chloride are combined, solid silver chloride forms along with a new liquid, sodium nitrate. Witch substance represents the precipitate? Silver nitrate silver chloride sodium chloride sodium nitrate

The summer season at Arica and Rio de Janeiro Occurs from approximately

What are the major function of the digestive system

What is a substance made of identical atoms called?