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Anastaziya [24]
3 years ago
8

When recording measurement data, why is the use of significant figures important?

Chemistry
1 answer:
Naddik [55]3 years ago
5 0
What I understood from my teacher when he was explaining is that when you round the given number from the measurements into scientific figures or scientific notations I think that's because they well help you do the math easy and help you in science basically 
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The equilibrium constant, Kp, for the following reaction is 0.497 at 500K.PCl5(g) PCl3(g) + Cl2(g)If an equilibrium mixture of t
Anestetic [448]

<u>Answer:</u> The equilibrium partial pressure of chlorine gas is 0.360 atm

<u>Explanation:</u>

For the given chemical equation:

PCl_5(g)\rightleftharpoons PCl_3(g)+Cl2(g)

The expression of K_p for above reaction follows:

K_p=\frac{p_{Cl_2}\times p_{PCl_3}}{p_{PCl_5}}

We are given:

K_p=0.497\\p_{PCl_3}=0.651atm\\p_{PCl_5}=0.471atm

Putting values in above equation, we get:

0.497=\frac{p_{Cl_2}\times 0.651}{0.471}\\\\p_{Cl_2}=0.360atm

Hence, the equilibrium partial pressure of chlorine gas is 0.360 atm

5 0
3 years ago
4. What type of evidence do you think would be most difficult to collect
mars1129 [50]

I think it is trace evidence since it is really small and hard to find.

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3 years ago
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Can you please answer Question 9 please
MissTica
The answer is C because I kno
6 0
3 years ago
Plzz!!! I need help now<br><br><br> this is science
Neko [114]
1)300-100=200N
2)300+100=400N
3)200+100-300=300-300=0N
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3 years ago
What element glows in sign's when excited
ser-zykov [4K]

Answer:

The element that glows in signs is xenon.

Explanation:

Xenon is a chemical element with the symbol Xe and atomic number 54. It is a colorless, dense, odorless noble gas found in Earth's atmosphere in trace amounts. Xenon is used in flash lamps, arc lamps, and as a general anesthetic. Xenon emits a blue or lavenderish glow when excited by electrical discharge, it emits a band of emission lines that span the visual spectrum, but the most intense lines occur in the region of blue light, producing the coloration.

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3 years ago
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