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Chemistry, 21.06.2019 19:30
How many molecules of sucrose c12h22o11 are there in 454 grams of sucrose
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Chemistry, 22.06.2019 03:00
Which of the dna typing techniques do you think you would choose if you had to analyze a dna sample? why?
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Chemistry, 22.06.2019 11:40
Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) β h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 Β°c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)
Answers: 1
Chemistry, 22.06.2019 11:50
Which of the following statements about hybrid orbitals is or are true? choose all that apply. choose all that apply. under sp2 hybridization, the large lobes point to the vertices of an equilateral triangle. after an atom undergoes sp hybridization there is one unhybridized p orbital on the atom. the angle between the large lobes of sp3 hybrids is 109.5β
Answers: 2
What is the difference between solution and solute...
Mathematics, 16.10.2020 20:01
Mathematics, 16.10.2020 20:01
Mathematics, 16.10.2020 20:01
Mathematics, 16.10.2020 20:01
Mathematics, 16.10.2020 20:01
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Chemistry, 16.10.2020 20:01
Mathematics, 16.10.2020 20:01