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Sonja [21]
3 years ago
12

Which fossils are formed by sediments and found in sedimentary rock.

SAT
1 answer:
Anastaziya [24]3 years ago
8 0
The answer is petrified fossils
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An archeologist claimed that he found some gold coins date 46 BC. Do you think this is possible?
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Answer:

No, I don't.

How could the coins be stamped "46 B.C." when people of that time would have no way of knowing how many years before Christ it was?

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6 0
3 years ago
Kp for the following reaction at a give temperature is 0. 263 at 1000. K: c(s) + 2 h2(g) ⇌ ch4(g) what is the total pressure (in
ratelena [41]

This problem is providing us with the reaction whereby methane is produced from solid carbon and gaseous hydrogen, as well as its Kp and asks for the total pressure at equilibrium for a specified addition of reactants. At the end, the answer turns out to be 11.7 atm.

<h3>Chemical equilibrium</h3>

In chemistry, when a chemical reaction takes place, it proceeds until a point called equilibrium, where the concentration of all the species start becoming unchanged. Thus, we can use equilibrium expressions whenever we needed pressures or concentrations at equilibrium.

In this case, for the reaction we were given, we can write the following equilibrium expression, where the solid carbon is excluded:

Kp=\frac{p_{CH_4}}{p_{H_2}^2} =0.263

Which can also be written in terms of the reaction extent and the initial pressure of hydrogen:

0.263=\frac{x}{(p_{H_2}^0-2x)^2}

Thus, we calculate the initial pressure of hydrogen with the temperature and volume of the flask:

p_{H_2}^0=\frac{(4.50g/2.02g/mol)*0.08206\frac{atm*L}{mol*K}*1000K}{10.0L}\\ \\p_{H_2}^0=18.3atm

Hence, we solve for x in the equilibrium expression as follows:

0.263=\frac{x}{(18.3-2x)^2}\\\\x_1=6.64atm\\\\x_2=12.6atm

Where the correct value is 6.64 atm because the 12.6 atm turns out into  a negative pressure for hydrogen at equilibrium. Finally, we calculate the total pressure with:

P_T=p_{CH_4}+p_{H_2}=x+18.3-2x\\\\P_T=6.64atm+18.3atm-2*6.64atm\\\\P_T=11.7atm

Learn more about chemical equilibrium: brainly.com/question/13444482

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3 years ago
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denis23 [38]

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Suppose an engineer has been instructed to create three new sky rides in the park. He has been given the length and the time each one must travel. How might he come up with a way to find the speed for each one?

What formula could the engineer use to help him figure out the speed of each sky ride? Explain what each letter in your formula represents.

Answer in complete sentence

Explanation:

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4 years ago
Give me 5 reasons why homework shucks and If it is illegal.
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