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Mekhanik [1.2K]
2 years ago
12

Methane gas, which may be present in confined spaces such as a basement, can cause death by __________.

Chemistry
1 answer:
stiks02 [169]2 years ago
4 0

Methane gas, which may be present in confined spaces such as a basement, can cause death by asphyxiation.

<h3>What are the dangers of methane gas in confined space?</h3>

Low amounts are safe for inhalation. A significant amount can replace oxygen in the atmosphere. Reduced oxygen availability can cause symptoms like weariness, emotional instability, fast breathing, and rapid heart rate. Insufficient oxygen can cause nausea, vomiting, collapse, convulsions, coma. The onset of symptoms is accelerated by physical activity. Organs including the heart and brain can suffer long-term damage from a lack of oxygen.

Contact with Skin: Not irritating. The skin might become chilled or frozen when in direct touch with the liquid gas (frostbite). Itching and numbness are signs of mild frostbite. Burning and rigidity are signs of more serious frostbite.

No evidence of carcinogenicity.

learn more about methane gas refer:

brainly.com/question/25649765

#SPJ4

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Calculate the volume (in cm³) of 38.5 grams of platinum if the density of platinum is 21.5 g/cm³. Give your answer to 2 decimal
Gennadij [26K]

Answer:

\boxed {\boxed {\sf v\approx  1.79 \ cm^3}}

Explanation:

The formula of density is:

d=\frac{m}{v}

If the formula is rearranged for volume, it becomes:

v=\frac{m}{d}

The mass of the platinum is 38.5 grams.

The density is 21.5 grams per cubic centimeter.

m=38.5 \ g \\d= 21.5 \ g/cm^3

Substitute the values into the formula.

v=\frac{38.5 \ g}{ 21.5 \ g/cm^3}

Divide. Note that the grams (g) will cancel each other out.

v=1.79069767 \ cm^3

Round to 2 decimal places (hundredth place). The 0 in the thousandth place tells us to leave the 9 in the hundredth place.

v\approx  1.79 \ cm^3

The volume is about <u>1.79 cubic centimeters.</u>

6 0
3 years ago
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4 years ago
The solubility of acetanilide is 0.53 g in 100 mL of ice‑cold water, and 5.50 g in 100 mL of boiling water. What is the maximum
GrogVix [38]

Answer:

MPR=90,36%

Explanation:

The recrystallization is a purification process where the solid to purify is dissolved in an appropriated dissolvent and then, changing the conditions the solubility changes and that solid (that was in solution before) precipitates and form crystals.

In this case, for boiling water 5.50 g of  acetanilide could be dissolved and then cold the water, so the mass of crystals formed will be  

m_{crystal}=\left(5.5-0.53\right)g=4.97g

The maximum percent recovery is then

MPR=\frac{mass\ of\ solid\ recovered}{mass\ of\ solid\ disolved}\times 100\% = \frac{4.97g}{5.5g}\times 100\%=90,36\%

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Answer:

Distillation

Explanation:

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