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Flauer [41]
2 years ago
9

PLEASE ANSWER QUICKLY !!! FOR MY CHEMISTRY CLASS !!!!!

Chemistry
1 answer:
Sergio039 [100]2 years ago
4 0

The density of the unknown metal, given the data is 1.67 g/mL

<h3>What is density? </h3>

The density of a substance is simply defined as the mass of the subtance per unit volume of the substance. Mathematically, it can be expressed as

Density = mass / volume

With the above formula, we can determine the density of the unknown metal. Details below:

<h3>How to determine the density </h3>
  • Mass of unknown metal = 20 - 0 = 20 g
  • Volume of unknown metal = 12 - 0 = 12 mL
  • Density of unknown metal =?

Density = mass / volume

Density of unknown metal = 20 / 12

Density of unknown metal = 1.67 g/mL

Thus, the density of unknown metal is 1.67 g/mL

Learn more about density:

brainly.com/question/952755

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PLEASE HELP DUE TODAY 55 POINTS
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Answer : The final volume of gas will be, 26.3 mL

Explanation :

Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.

The combined gas equation is,

\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}

where,

P_1 = initial pressure of gas = 0.974 atm

P_2 = final pressure of gas = 0.993 atm

V_1 = initial volume of gas = 27.5 mL

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T_1 = initial temperature of gas = 22.0^oC=273+22.0=295K

T_2 = final temperature of gas = 15.0^oC=273+15.0=288K

Now put all the given values in the above equation, we get:

\frac{0.974 atm\times 27.5 mL}{295K}=\frac{0.993 atm\times V_2}{288K}

V_2=26.3mL

Therefore, the final volume of gas will be, 26.3 mL

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