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il63 [147K]
3 years ago
12

Round to 2 significant numbers, 5239

Chemistry
1 answer:
ohaa [14]3 years ago
3 0

Answer:

Explanation:

Two sig digits means that 5239 becomes 52 with some zeros behind it. How many?

There were 2 numbers after the 2. So two sig digits would become 5200

If the third digit from the left is a 5 or more then the answer would be

5300.

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A sample of xenon gas occupies a volume of 6.80 L at 52.0°C and 1.05 atm. If it is desired to increase the volume of the gas sam
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Answer:

207.03°C

Explanation:

The following data were obtained from the question:

V1 (initial volume) = 6.80 L

T1 (initial temperature) = 52.0°C = 52 + 273 = 325K

P1 (initial pressure) = 1.05 atm

V2 (final volume) = 7.87 L

P2 (final pressure) = 1.34 atm

T2(final temperature) =?

Using the general gas equation P1V1/T1 = P2V2/T2, the final temperature of the gas sample can be obtained as follow:

P1V1/T1 = P2V2/T2

1.05 x 6.8/325 = 1.34 x 7.87/T2

Cross multiply to express in linear form as shown below:

1.05 x 6.8 x T2 = 325 x 1.34 x 7.87

Divide both side by 1.05 x 6.8

T2 = (325 x 1.34 x 7.87) /(1.05 x 6.8)

T2 = 480.03K

Now, let us convert 480.03K to a number in celsius scale. This is illustrated below:

°C = K - 273

°C = 480.03 - 273

°C = 207.03°C

Therefore, the final temperature of the gas will be 207.03°C

5 0
3 years ago
An object that allows almost all that light that strikes it to pass through and that forms a clear image is
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Answer: the object is transparent.

Explanation:

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The combustion of ethane (C2H6)(C2H6) produces carbon dioxide and steam. 2C2H6(g)+7O2(g)⟶4CO2(g)+6H2O(g) 2C2H6(g)+7O2(g)⟶4CO2(g)
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Answer:

11.9 moles of carbon-dioxide will produced.

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According to reaction 2 moles of ethane produces 4 moles of carbon-dioxide.

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\frac{4}{2}\times 5.95 mol=11.9 mol of carbon-dioxide

11.9 moles of carbon-dioxide will produced.

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Why is burning wood a chemical change?
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How many energy levels does period 5 and period 6 have?
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