How many atoms are there in 2 moles of sodium? a. 6.02 × 10^23 atoms b. 1.2 × 10^24 atoms c. 3.32 × 10^24 atoms d. 2.4 × 10^25 atoms (not a or d)

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?

What was bohr’s contribution to the planetary model

Calculate the estimated density of each ball. use the formula d = m/v where d is the density, m is the mass, and v is the volume. record your calculations in table a of your student guide. given that the density of water is 1.0 g/cm3, make a prediction about whether each ball will float in water. record your prediction in table a. what is the estimated density of the table tennis ball? record your answer to the nearest hundredth