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erastova [34]
3 years ago
10

The concentration of carbon monoxide in an urban apartment is 48 g/m". What mass of carbon monoxide in grams is present in a roo

m measuring 12.0
X 12.5 X 18.5 ft?
Express your answer using two significant figures.
Chemistry
1 answer:
ANEK [815]3 years ago
3 0

3.9 x 10³g

Explanation:

Given parameters;

concentration = 48g/m³

Room dimension = 12 x 12.5 x 18.5ft

unknown:

Mass of carbon dioxide in the room = ?

Solution:

We know that in a room the concentration of carbon monoxide is 48g/m³

To find the mass of the carbon monoxide in a given room, we simply multiply the given concentration level with the volume of the room.

Mass of carbon monoxide = concentration x volume of room

To find the volume of room;

Dimension =  12 x 12.5 x 18.5 in ft to m;

               1ft = 0.31m

12ft to meter is 0.31 x 12 = 3.72m

12.5ft to meter is 0.31 x 12.5 = 3.88m

18.5ft to meter is 0.31 x 18.5 = 5.74m

Volume of the room = 3.72 x 3.88 x 5.74 = 82.8m³

  Mass of carbon monoxide = concentration x volume of room

  Mass of carbon monoxide = 48 x 82.8 = 3.9 x 10³g

learn more:

Density brainly.com/question/2690299

#learnwithBrainly

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A researcher is measuring changes in the density of the upper atmosphere over time. Which units should be used for the density m
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lbm/ft³ or psi/ft

Explanation:

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NOTE:

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A typical person has an average heart rate of 75.0 beats/min. Pay close attention to significant figures in this question.
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The number of beats  the person have in 1.7 years is  6.7 x 10⁷ beats.

<h3>Number of beats of the person</h3>

The number of beats of the person is calculated as follows;

n = bt

where;

  • b is the beat rate
  • n is number of beats
  • t is time or duration

b = 75 beats/min

t = 1.7 years = 893520 mins

n = 75 beats/min x 893520 mins

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When a copper atom loses an electron to become a Cu+
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In this case the only valence electron is 4s1.

The feasible quantun numbers for that electron are.

n (principal quantum number or energy level) = 4
l (Azimuthal quantum number)= 0 (this is because the orbital s can only have this number)
ms (magnetic quantum number) = 0 (this can only be from - l to + l, the in can only be 0(
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Answer: (4,0,0, +1/2) or (4,0,0, -1/2)


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