2 years ago

St2 Second Laws

Chemistry

1 answer:

jeyben [28]2 years ago

7 0

Answer: b. 606

Explanation:

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Sveta_85 [38]

Answer:

it's C

Explanation:

because it exhaled the carbon dioxide

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1 year ago

If 1.546 g of copper was used by a student at the start of the lab, and 0.732 g of copper were obtained at

mash [69]

Answer: Percent recovery is 47.34 %

Explanation:

Percent yield is defined as the ratio of experimental yiled to theoretical yield in terms of percentage.

${\text{ percent yield}}=\frac{\text{amount recovered}}{\text{total amount}}\times 100$

Putting in the values we get:

${\text{ percent yield}}=\frac{0.732}{1.546}\times 100=47.34\%$

Therefore, the percent recovery is 47.34 %

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2 years ago

Convert 55.0 miles per hour to feet per second

labwork [276]

Answer:

80.667

Explanation:

math

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2 years ago

A reaction between liquid reactants takes place at - 11.0 degree C in a sealed, evacuated vessel with a measured volume of 45.0

Sati [7]

Explanation:

The given data is as follows.

T = $11^{o}C$ = (11 + 273) K = 284 K, V = 45.0 L

m = 35 g

As molar mass of chlorine pentafluoride is 130.445 g/mol. Hence, number of moles of chlorine pentafluoride are as follows.

No. of moles = $\frac{mass}{\text{molar mass}}$

= $\frac{35 g}{130.445 g/mol}$

= 0.268 mol

Now, using the ideal gas equation we will find the pressure as follows.

PV = nRT

$P \times 45.0 L = 0.268 mol \times 0.082 L atm/mol K \times 284 K$

P = 0.139 atm

Thus, we can conclude that pressure of chlorine pentafluoride gas in the given reaction vessel after the reaction is 0.139 atm.

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2 years ago

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Salsk061 [2.6K]

Answer:

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Explanation:

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3 years ago

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