Chemistry, 06.10.2019 05:20 andrewjewell2005
Each sentence below describes a step of the scientific method. match each sentence with a step of the scientific method listed below.
a. recognize a problem b. form a hypothesis c. test the hypothesis with an experiment d. draw conclusions
1 stephen predicted that seeds would start to grow faster if an electric current traveled through the soil in which they were planted.
2 susan said, “if i fertilize my geranium plants, they will blossom.”
3 jonathan’s data showed that household cockroaches moved away from raw cucumber slices.
4 rene grew bacteria from the mouth on special plates in the laboratory. she placed drops of different mouthwashes on bacteria on each plate.
5 kathy used a survey to determine how many of her classmates were left-handed and how many were right-handed.
6 jose saw bats catching insects after dark. he asked, “how do bats find the insects in the dark? ”
7 justin wondered if dyes could be taken out of plant leaves, flowers, and stems. 8 kevin said, “if i grow five seedlings in red light, i think the plants will grow faster than the five plants grown in white light.”
Answers: 1
Chemistry, 22.06.2019 06:00, lindseyklewis1p56uvi
Ethanol (c2h5oh) is produced from the fermentation of sucrose in the presence of enzymes. c12h22o11(aq) + h2o(g) 4 c2h5oh(l) + 4 co2(g) determine the theoretical yield and the percent yields of ethanol if 680. g sucrose undergoes fermentation and 326.5 g ethanol is obtained. theoretical _ g _ percent %
Answers: 1
Chemistry, 22.06.2019 07:20, rex1578
Part b: study of equilibrium on solubility: mg(oh)2(s) ⇌ mg2+(aq) + 2 oh–(aq) cloudy clear (pink) 7. a. b. 8. a. b. 9. 10. 11. 12. when adding concentrated hydrochloric acid, how did the appearance of the equilibrium mixture change? the change in appearance indicated a shift in the point of equilibrium. in which direction did the equilibrium shift? (l) left (r) right explain your answer to question 7a. you should indicate which ion was added to or removed from the equilibrium mixture. when adding edta, how did the appearance of the equilibrium mixture change? the change in appearance indicated a shift in the point of equilibrium. in which direction did the equilibrium shift? (l) left (r) right explain your answer to question 8a. you should indicate which ion was added to or removed from the equilibrium mixture. upon heating in which direction is the equilibrium shifting? upon cooling in which direction is the equilibrium shifting? is the forward reaction a. endothermic explain your answers to questions 9, 10, and 11. (l) left (r) right (l) left (r) right b. exothermic
Answers: 1
Chemistry, 22.06.2019 09:30, raizagisselle1694
Mike and mitchell decide to have a foot race. they mark off a stretch of 100 yards, and recruit cindy to work the stopwatch. after running the race and looking at the results, cindy declared that mitchell was the fastest. so how did the boys times compare?
Answers: 3
Each sentence below describes a step of the scientific method. match each sentence with a step of th...
Mathematics, 19.05.2020 14:12
Mathematics, 19.05.2020 14:12