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kenny6666 [7]
3 years ago
12

In their experiment to form a primitive living cell, Urey and Miller set up various flasks with water vapor and the gases CO2, C

H4, and H2. One flask also had electrodes to generate spark; another flask had electrodes to generate spark; another flask had everything but electrodes. Which of the flasks showed presence of coacervates, and why?
A: only the flask with the electrodes because the electrodes were a source of electricity that simulated lighting.
B: only the flask without electrodes because the electricity generated from electrodes would have destroyed the coacervates.
Chemistry
1 answer:
Digiron [165]3 years ago
4 0
The answer is clearly the option <span>A, because in the Urey/Miller experiment, they simulated Earth's early atmosphere and they simulated the lightning as electrodes, to see if single compounds or amino acids would form. Hope this is useful</span>
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the element carbon has two common isotopes: C-12 (12 U) AND C-13 (13.003355 U). IF THE AVERAGE ATOMIC MASS OF CARBON IS 12.0107
oksian1 [2.3K]

Answer:

The percent isotopic abundance of C- 12 is 98.93 %

The percent isotopic abundance of C- 13 is 1.07 %

Explanation:

we know there are two naturally occurring isotopes of carbon, C-12 (12u)  and C-13 (13.003355)

First of all we will set the fraction for both isotopes

X for the isotopes having mass 13.003355

1-x for isotopes having mass 12

The average atomic mass of carbon is 12.0107

we will use the following equation,

13.003355x + 12 (1-x) = 12.0107

13.003355x + 12 - 12x = 12.0107

13.003355x- 12x = 12.0107 -12

1.003355x = 0.0107

x= 0.0107/1.003355

x= 0.0107

0.0107 × 100 = 1.07 %

1.07 % is abundance of C-13 because we solve the fraction x.

now we will calculate the abundance of C-12.

(1-x)

1-0.0107 =0.9893

0.9893 × 100= 98.93 %

98.93 % for C-12.

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3 years ago
Which type of alcohol on board Jönköping turned out to be no value to the salvage crew
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Answer : The formula unit of Sr & Cl is SrCl_2 and the formula unit of Al & S is Al_2S_3

Explanation :

Formula unit : it is defined as the lowest number ratio of ions of an elements in an ionic compound or covalent compound.

For the formula unit of Sr & Cl, two chloride ions(Cl^-) are needed to neutralize the one strontium ion(Sr^{2+}).

For the formula unit of Al & S, three sulfide ions(S^{2-}) are needed to neutralize the two aluminium ion(Al^{3+}).

The formula unit of SrCl_2 and Al_2S_3 are shown below.

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Katarina [22]
 <span>0.38 

You first calculate the total moles by dividing the grams by molecular weight: 
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Then you divide the moles of Ar by the total number of moles: 
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8 0
4 years ago
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