3 years ago

A pure gold bar is made up of only particles. A.nickelB.copper C.godD.gold

Chemistry

1 answer:

Minchanka [31]3 years ago

4 0

Answer: gold

Explanation:

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64.92 grams of Hg(NO3)2 to make 5.00 liters of solution.

12345 [234]

Answer:

$\large\boxed{\large\boxed{0.0400mol/liter}}$

Explanation:

Knowing that you have 64.92 grams of Hg(NO₃)₂ to make 5.00 liters of solution, you can calcualte the molarity of the solution.

Molarity is a measure of concentration, defined as the number of moles of solute per liter of soluiton. Mathematically:

$Molarity=\frac{\text{number of moles of solute}}{\text{liters of solution}}$

Then, first you must calculate the number of moles of solute. The formula is:

$\text{number of moles}=\frac{\text{mass in grams}}{\text{molar mass}}$

You can either calculate the molar mass of the compound using the chemical formula or search it in the internet.

The molar mass of Hg(NO₃)₂ is found to be 324.7 g/mol.

Now you have everything to calculate the molarity of the solution:

$\text{number of moles}=\frac{64.92g}{324.7g/mol}=0.199977mol\approx 0.200mol$

$Molarity=\frac{0.19977mol}{5.00liters}\approx0.0400mol/liter$

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3 years ago

A pure gold bar is made up of only particles. A.nickelB.copper C.godD.gold​

A pure gold bar is made up of only particles. A.nickelB.copper C.godD.gold