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Delayne Pyle

Delayne P.

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Nicole Smina verified

Numerade educator

The ability to echolocate in both bats and dolphins is due to [x] The similar bone structure in the limbs of bats and dolphins is due to [y] The presence of four limbs in bats is a(n) [z] trait The presence of blowholes in the taxon that contains whales, dolphins, and porpoises (i.e. the only taxon that has blowholes) is a(n) [a] trait The ability to echolocate in both bats and dolphins is due to shared ancestry The similar bone structure in the limbs of bats and dolphins is due to ancestral The presence of four limbs in bats is a(n) derived trait The presence of blowholes in the taxon that contains whales, dolphins, and porpoises (i.e. the only taxon that has blowholes) is a(n) convergent evolution trait sympatry convergent evolution derived shared ancestry ancestral

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Jenny Wu verified

Numerade educator

Look at the phylogenetic trees shown. Which show similar relationships? (A) (B) (C) (A) and (B) (B) and (C) (A) and (C) They are all the same. They are all different.

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INSTANT ANSWER

the second order decay of butadiene, C4H6 to form C8H12 has a rate constant, k = 0.014 M-1 s-1 What will be the concentration of C4H6 after 2.0 hours if the initial concentration is 0.025 M?

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The Henry's Law constant of methyl bromide, CH3Br, is 0.159 mole/L·atm at 25°C. What is the solubility of methyl bromide in water at 25°C if its partial pressure above the water is 250 mm Hg? (Hint: Remember 760 mmHg = 1 atm) Selected Answer: Correct 0.0523 mole/L Answers: 3.22 mole/L Correct 0.0523 mole/L 0.483 mole/L 0.329 mole/L

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A solution containing 6.90 mg of a protein in 10.00 mL aqueous solution has an osmotic pressure of 8.10 torr at 24.9°C. Determine the molar mass of the protein Selected Answer: Incorrect 1.88×103 g/mole Answers: 1.88×103 g/mole 1.32×103 g/mole Correct 1.58×103 g/mole 1.19×103 g/mole 1.43×103 g/mole

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Question 19 The following titration curve is most likely from a titration of \( \qquad \) , the resulting solution at the equivalence point will be \( \qquad \) Selected Answer: Strong base by strong acid; acidic Answers: Strong base by strong acid; acidic Weak base by strong acid; acidic Weak acid by strong base; basic Weak base by weak acid; neutral

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When 100 mL 0.010 M Pb(NO3)2 and 100 mL 0.060 M NaBr are mixed a precipitae will form KSP (PbBr2) = 6.6×10-6 Selected Answer: Incorrect True Answers: True Correct False

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Determine the [C2H3O2−] / [HC2H3O2] ratio necessary to make a buffer solution with a pH of 4.44 KA=1.8×10−5 for HC2H3O2 Selected Answer: Correct 0.50 / 1 Answers: Correct 0.50 / 1 0.94 / 1 1.1 / 1 2.0 / 1

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The following exothermic reaction is at equilibrium in a sealed container. Which of the following changes would result in an increase in the number of moles of PCl5(g) present at equilibrium? PCl3(g) + Cl2(g) PCl5(g) I. increasing the temperature II. increasing the volume Selected Answer: Incorrect I only Answers: I only II only Both I and II Correct Neither I nor II

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As the pH decreases, the solubility of ________ would increase. Selected Answer: Incorrect HgBr2 Answers: PbCl2 AgI Correct MgCO3 HgBr2 AgCl

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