Use the henderson–hasselbalch equation to calculate the ph of each solution: part aa solution that is 0.145 m in propanoic acid and 0.115 m in potassium propanoate express your answer using two decimal places. php h = nothingrequest answerpart ba solution that contains 0.690% c5h5n by mass and 0.955% c5h5nhcl by massexpress your answer using two decimal places. php h = nothing request answer part a solution that is 11.0 g of hf and 25.5 g of naf in 125 ml of solutionexpress your answer using two decimal places. php h = nothingrequest answerprovide feedback

Aleaky 10-kg bucket is lifted from the ground to a height of 15 m at a constant speed with a rope that weighs 0.7 kg/m. initially the bucket contains 45 kg of water, but the water leaks at a constant rate and finishes draining just as the bucket reaches the 15-m level. find the work done. (use 9.8 m/s2 for g.) show how to approximate the required work by a riemann sum. (let x be the height in meters above the ground. enter xi* as xi.) lim n → ∞ n (9.8)(45−3 xi) i = 1 δx express the work as an integral. 0 dx evaluate the integral. (round your answer to the nearest integer.) j