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Schach [20]
3 years ago
10

For an object to be seen, light must leave ___ and enter ___.

Chemistry
1 answer:
laila [671]3 years ago
6 0

Answer:

C

Explanation:

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A sample of Ammonia gas at 650mmHg and 15 degree has a mass of 56.8g.calculate the volume occupied by the gas. Take N=14, H=1,R=
avanturin [10]

Answer:

The first thing we have to do is change and state all the units so that we can use our ideal gas law equation (PV = nRT).

650 mmHg is a pressure unit, we have to convert this to kiloPascals. We know that 760 mmHg gives us 101 kPa.

650 \ mmHg \ * \ \frac{101kPa}{760 mmHg} = 86 \ kPa

P = 86kPa

T = 15°C + 273K = 288K

R (Gas constant) = 8.31 kj/mol  

Molar mass of Ammonia (NH_{3}) = (1 x 3) + (14) = 17g/mol

n (moles) = \frac{mass}{molar \ mass} = \frac{56.8}{17} = 3.34 mol

V = ?

Rearrange the equation to solve for Volume:

V = \frac{nRT}{P}

Substitute the values inside:

V = \frac{(3.34)(8.31)(288)}{(86)} = 93 L (rounded)

<u>Therefore 93 L of volume is occupied by the ammonia gas.</u>

<u></u>

4 0
2 years ago
A Sedentary lifestyle is a way of life that includes a lot of physical activity true or false?
geniusboy [140]
2h-7 I had that before unless I’m tripping but I did rechecked
4 0
3 years ago
Calculate the number of moles of BaF2 in a 10.0 g sample of BaF2.
UkoKoshka [18]

Answer:

The number of moles = 0.06 moles

Explanation:

i) Formula

Number of moles = Mass of the sample ÷ Molar masses of the substances

ii) Number of moles = 10.0 ÷ (137)+(19×2)

= 10.0 ÷ 175

= 0.06 moles

5 0
4 years ago
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How would an increased level of acetyl-CoA be expected to affect the pyruvate dehydrogenase reaction
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The pyruvate dehydrogenase kinase enzyme activity would increase, resulting in an inhibition of pyruvate dehydrogenase activity. ... An in vitro study shows that isocitrate dehydrogenase is activated in the citrate cycle.

Explanation:

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3 years ago
How many grams are in 4.3 mol of H2O?
soldier1979 [14.2K]

Answer:

453.92 g

Explanation:

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4 0
3 years ago
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