3 years ago

I need help with this question please

Chemistry

1 answer:

KATRIN_1 [288]3 years ago

8 0

Answer:

hope this is correct

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Which component of blood allows oxygen from the air to move from the lungs to cells of the body?

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oxygen moves thru hemoglobin

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217 mL of neon gas at 551 celsius is brought to standard temperature (0 celsius) while the pressure is held constant. What is th

pantera1 [17]

Answer: The new volume is 72 ml

Explanation:

To calculate the final volume of the system, we use the equation given by Charles' Law. This law states that volume of the gas is directly proportional to the temperature of the gas at constant pressure.

Mathematically,

$\frac{V_1}{T_1}=\frac{V_2}{T_2}$

where,

$V_1\text{ and }T_1$ are the initial volume and temperature of the gas.

$V_2\text{ and }T_2$ are the final volume and temperature of the gas.

We are given:

$V_1=217ml\\T_1=551^oC=(551+273)K=824K\\V_2=?\\T_2=0^0C=(0+273)K=273K$

Putting values in above equation, we get:

$\frac{217ml}{824K}=\frac{V_2}{273K}\\\\V_2=72ml$

Thus the new volume is 72 ml

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A student reports the following measurements for a set of pennies: 102.0mL, 91.0 g. What is the density of the pennies.

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Answer:

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density = ...?

density = m / V

= 91.0 / 102.0

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1<br> The process of a solid turning into a liquid is called

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Answer:

Melting

Explanation:

Once heat is added it will turn to a liquid

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