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cluponka [151]
3 years ago
13

the tip of a match contains chemical energy. Kevin's father lit a match and blew out the flame. then he tried to light the same

match again . Kevin observed that nothing happened. what can you infer from this observation?

Chemistry
1 answer:
Ostrovityanka [42]3 years ago
8 0
The chemicals were used so it did not light again
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Compare and contrast the functions of each of the following types of flasks: filter, Erlenmeyer, volumetric. (Site 2)
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<span>Lastly, the Volumetric flasks are graduated flasks which having markings for different volumes. They are calibrated accurately for a specific amount of liquid that can be contained in it hence this is specially used for storing precise amounts of liquid. </span>
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Why are metals good conductors of heat and electricity
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Explain why an atom may go through nuclear decay but another won't? use examples to support your answer.
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3 years ago
If a 2.50 liter container is filled with Ne gas at a pressure of 650 mm Hg and at 25°C, what mass of Ne is in the container?
seraphim [82]

Answer:

1.76 g is the mass of Ne is in the container.

Explanation:

We use the equation given by ideal gas which follows:

PV=nRT

where,

P = pressure of the gas = 650 mm Hg

V = Volume of the gas = 2.50 L

T = Temperature of the gas = 25^oC=[25+273]K=298K

R = Gas constant = 62.3637\text{ L.mmHg }mol^{-1}K^{-1}

n = number of moles of Ne gas = ?

Putting values in above equation, we get:

650mmHg\times 2.50L=n\times 62.3637\text{ L.mmHg }mol^{-1}K^{-1}\times 298K\\\\n=\frac{650\times 2.50}{62.3637\times 298}=0.0874mol

Also, molar mass of Ne = 20.1797 g/mol

So, Mass = Moles\times Molar\ mass = 0.0874\times 20.1797 g = 1.76\ g

<u>1.76 g is the mass of Ne is in the container.</u>

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3 years ago
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