Use the Periodic Table to find molar mass of
water.
Sodium hydroxide (NaOH) and hydrochloric acid
(HCI) react to form sodium chloride (NaCl) and
water according to the equation:
NaOH + HCI → NaCl + H20
What mass of water forms when 2.75 x 10-4 mol
NaOH reacts completely?
2.75 x 104 mol NaOH =
g H20

On a certain portion of an experiment, a statistical test result yielded a p-value of 0.21. what can you conclude? 2(0.21) = 0.42 < 0.5; the test is not statistically significant. if the null hypothesis is true, one could expect to get a test statistic at least as extreme as that observed 21% of the time, so the test is not statistically significant. 0.21 > 0.05; the test is statistically significant. if the null hypothesis is true, one could expect to get a test statistic at least as extreme as that observed 79% of the time, so the test is not statistically significant. p = 1 - 0.21 = 0.79 > 0.05; the test is statistically significant.