Chemistry, 04.06.2021 08:00, SamaHafiz8984
A nutritional chemist wants to confirm the calories contained in one serving size of these Pringles. The chemist burns the food in a bomb color calorimeter and notices that 10 kg of water increase in temperature from 25°C to 54°C. Is the nutritional facts label correct? Assume that there is no heat loss. Show your work clearly. One serving equals 280 calories.
Answers: 3
Chemistry, 22.06.2019 10:00, youngchapo813p8d9u1
Main expenses you plan on making payments on a new car too. you want to spend 15% of your monthly net pay on the car payment, insurance, registration, and taxes combined. what is your monthly car allowance? $149.46 $298.91 $448.37 $597.83
Answers: 3
Chemistry, 23.06.2019 13:30, jcastronakaya
The zinc within a copper-plated penny dissolves in hydrochloric acid if the copper coating is filed down in several spots (so that the hydrochloric acid can reach the zinc). the reaction between the acid and the zinc 2h+(aq)+zn(s)→h2(g)+zn2+(aq) . when the zinc in a certain penny dissolves, the total volume of gas collected over water at 25 °c is 0.947 l at a total pressure of 743 mmhg . (vapor pressure of water is 23.78 mmhg at 25 °c .) what mass of hydrogen gas is collected? answer in appropriate significant figures
Answers: 3
Chemistry, 23.06.2019 16:00, naiomireyes74p2aybs
Be sure to answer all parts. the catalytic destruction of ozone occurs via a two-step mechanism, where x can be any of several species: (1) x + o3 → xo + o2 [slow] (2) xo + o → x + o2 [fast] (a) write the overall reaction. o3 + o → 2 o2 o3 + xo → x + 2 o2 xo + x + o3 + o → xo + x + 2 o2 x + o3 → xo + o2 (b) write the rate law for each step (using k for the rate constant). reaction 1: reaction 2: k[x][o2] k[xo][o2] k[x][o3] k[xo][o3] k[xo][o2] k[x][o] k[x][o2] k[xo][o] (c) x acts as a and xo acts as a catalyst intermediate intermediate catalyst (d) high-flying aircraft release no into the stratosphere, which catalyzes this process. when o3 and no concentrations are 3 ă— 1012 molecule/cm3 and 9.9 ă— 109 molecule/cm3, respectively, what is the rate of o3 depletion? the rate constant k for the rate-determining step is 6 ă— 10â’15 (cm3)2/moleculeâ·s. give your answer in scientific notation. use one significant figure in your answer. ă— 10 molecule/s
Answers: 2
A nutritional chemist wants to confirm the calories contained in one serving size of these Pringles....
Mathematics, 08.12.2020 01:10
Mathematics, 08.12.2020 01:10
Physics, 08.12.2020 01:10
French, 08.12.2020 01:10
Mathematics, 08.12.2020 01:10
Biology, 08.12.2020 01:10
Mathematics, 08.12.2020 01:10