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barxatty [35]
3 years ago
8

Small children are occasionally injured when they try to inhale helium from a compressed helium tank. If a small child tries to

transfer the contents of a 5.0 L tank of helium at a pressure of 125 atm and a temperature of 20⁰C into its lungs, how many moles of gas would the child inhale?
Chemistry
1 answer:
swat323 years ago
3 0

Answer:

26.0 moles

Explanation:

Given the formula;

PV =nRT

P= pressure of the gas

V = volume of the gas

n = number of moles of the gas

R = gas constant

T = temperature

n = PV/RT

n = 125 * 5/0.082 * (20 + 273)

n = 625/24.026

n = 26.0 moles

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Zanzabum

MW of gas : 124.12 g/mol

<h3>Further explanation  </h3>

Density is a quantity derived from the mass and volume  

Density is the ratio of mass per unit volume  

With the same mass, the volume of objects that have a high density will be smaller than objects with a smaller type of density  

The unit of density can be expressed in g/cm³ or kg/m³  

Density formula:  

\large {\boxed {\bold {\rho ~ = ~ \frac {m} {V}}}}

ρ = density  

m = mass  

v = volume  

glass vessel wieight = 50 g

glass vessel + liquid = 148 ⇒ liquid = 148 - 50 =98 g

volume of glass vessel :

\tt V=\dfrac{m}{\rho}=\dfrac{98}{0.989}=99.1~ml

An ideal gas :

m = 50.5 - 50 = 0.5 g

P = 760 mmHg = 1 atm

T = 300 K

\tt PV=\dfrac{mass(m)}{MW}.RT\\\\MW=\dfrac{m.RT}{PV}\\\\Mw=\dfrac{0.5\times 0.082\times 300}{1\times 0.0991}=124.12~g/mol

3 0
3 years ago
What is pollinatio <br>is it in the plants​
yarga [219]

Answer:

Pollination is the act of transferring pollen grains from the male anther of a flower to the female stigma. The goal of every living organism, including plants, is to create offspring for the next generation. One of the ways that plants can produce offspring is by making seeds.

Explanation:

hoped it helped

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3 years ago
Is tropism the response of a plant to light, gravity, touching . or water?
solniwko [45]

Answer:

all

Explanation:

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A gas occupies a volume of 31.0 ml at 19.0°C. If the gas temperature rises to 38.0°C at constant pressure. Calculate the new vol
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Explanation:

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V₁/T₁ = V₂/T₂

We have the following data:

V₁= 31.0 mL = 0.0031 L

T₁= 19.0°C = 292 K

T₂= 38.0°C = 311 K

V₂= ?

We calculate V₂ from the mathematical expression, as follows:

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The thyroid, parathyroid, and thymus are located in the
Studentka2010 [4]

Answer:

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Explanation:

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