The collins family and the watson family each used their sprinklers last summer. the collins family's sprinkler was used for 20 hours. the watson family's sprinkler was used for 25 hours. there was a combined total output of 875l of water. what was the water output rate for each sprinkler if the sum of the two rates was 40l per hour?

Asubstance is a good conductor of electricity which of the following best explains a probable position of the substance in a periodic table

Estimate the molar mass of the gas that effuses at 1.6 times the effusion rate of carbon dioxide.

Phosphoric acid is a triprotic acid ( =6.9×10−3 , =6.2×10−8 , and =4.8×10−13 ). to find the ph of a buffer composed of h2po−4(aq) and hpo2−4(aq) , which p value should be used in the henderson–hasselbalch equation? p k a1 = 2.16 p k a2 = 7.21 p k a3 = 12.32 calculate the ph of a buffer solution obtained by dissolving 18.0 18.0 g of kh2po4(s) kh 2 po 4 ( s ) and 33.0 33.0 g of na2hpo4(s) na 2 hpo 4 ( s ) in water and then diluting to 1.00 l.