7.72-g sample of magnesium reacts with the excess of nitrogen gas.
what is the mass of nitrogen consumed in grams

3 Mg(s) + N2(g) → Mg3N2(s)

You decide instead to take the train there. the train will take 135 minutes. convert this into hours and minutes.

The first-serve percentage of a tennis player in a match is normally distributed with a standard deviation of 4.3%. if a sample of 15 random matches of the player is taken, the mean first-serve percentage is found to be 26.4%. what is the margin of error of the sample mean? a. 0.086% b. 0.533% c. 1.11% d. 2.22%

The multiplicative property of equality states that for real numbers a, b, c, and d, if a = b and c = d, then ac = bd. true false