Use the periodic table to determine how many atoms of phosphorus (P) are in a sample that has a mass of 172.90 g.

3.48 × 1021 atoms

1.97 × 1022 atoms

3.36 × 1024 atoms

1.04 × 1026 atoms

If you add 10ml of hot water to 10ml of cold water and the change in tempature 8°c calculate how much energy is gained by the cold water

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.

Mike and mitchell decide to have a foot race. they mark off a stretch of 100 yards, and recruit cindy to work the stopwatch. after running the race and looking at the results, cindy declared that mitchell was the fastest. so how did the boys times compare?