Chemistry, 28.07.2019 04:00 shewag8749
Check my answers . 1. a copper block (20c) is placed in contact with a lead block (30c), which is already in contact with an iron block (70c). which of the following will happen? a) heat will flow from the copper to the lead and from the iron to the lead until the temperatures are equal. b) heat will flow from the iron to the lead and from the lead to the copper until the temperatures are equal. c) heat will flow from the copper to the lead to the iron until the temperatures are equal. d) heat will flow from the lead to the copper and to the iron until the temperatures are equal. i think the answer is b.
Answers: 1
Chemistry, 21.06.2019 15:30
Which substance absorbs 58.16 kj of energy when 3.11 mol vaporizes? a)ch4 b)h2s c)co2 d)nacl
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Chemistry, 21.06.2019 19:00
Apeak with a retention time of 407 s has a width at half-height (w1/2) of 7.6 s. a neighboring peak is eluted 17 s later with a w1/2 of 9.4 s. a compound that is known not to be retained was eluted in 2.5 s. the peaks are not baseline resolved. how many theoretical plates would be needed to achieve a resolution of 1.5?
Answers: 2
Chemistry, 21.06.2019 20:30
Which of the following pairs of elements belong to the same groupa. h and he b. li and bec. c and pb d. ga and ge
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Chemistry, 22.06.2019 03:30
If a solution is considered basic, then a) the hydroxide ion and hydronium ion concentrations are equal. b) the hydroxide ion concentration is less than the hydronium ion concentration. c) the hydronium ion concentration is greater than the hydroxide ion concentration. d) the hydroxide ion concentration is greater than the hydronium ion concentration.
Answers: 1
Check my answers . 1. a copper block (20c) is placed in contact with a lead block (30c), which is al...
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