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Lena [83]
3 years ago
15

You place 12.0 milliliters of water in a graduated cylinder. Then you add 15.0 grams of metal to the water and the new water lev

el is 13.91 milliliters. What is the density of the metal in grams per milliliter?
Chemistry
2 answers:
Marrrta [24]3 years ago
8 0

Answer:

<h3>The answer is 7.85 g/mL</h3>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume}  \\

volume = final volume of water - initial volume of water

volume = 13.91 - 12 = 1.91 mL

We have

density =  \frac{15}{1.91}  \\  = 7.853403141...

We have the final answer as

<h3>7.85 g/mL</h3>

Hope this helps you

Aneli [31]3 years ago
5 0

Answer:

Hello, Im Mack :)

Here is the Correct Solution for your question:

<u>Answer is 7.85 g/mL</u>

Explanation:

<em>The density of a substance can be found by using the formula</em>

<u>-volume = final volume of water - initial volume of water</u>

-volume = 13.91 - 12 = 1.91 mL

<u>-Final Answer is: 7.85 g/mL</u>

Hope this helped you out :)

<em><u>Comment if you need further help, and I'll reply asap.</u></em>

<em><u /></em>

<u>Have a great day my friend\ and best of luck to your studies :)</u>

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Calculate the solubility of copper(II) hydroxide, Cu(OH)2, in g/L​
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Ksp = [ Cu+² ] [ OH-] ²

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Ksp = [ Cu+² ] [ OH-] ²

Ksp [ cu (OH)2 ] = 2.2 × 10-²⁰

|__________|___<u>Cu</u><u>+</u><u>²</u><u> </u>__|_<u>2</u><u>OH</u><u>-</u>____|

|<u>Initial concentration(M</u>)|___<u>0</u>__|_<u>0</u>______|

<u>|Change in concentration(M)</u>|_<u>+S</u><u> </u>|__<u>+2S</u>__|

|<u>Equilibrium concentration(M)|</u><u>_S</u><u> </u><u>_</u><u>|</u><u>2S___</u><u>|</u>

Ksp = [ Cu+² ] [ OH-] ²

2.2 ×10-²⁰ = (S)(2S)²= 4S³

s =  \sqrt[3]{ \frac{2.2 \times  {10}^{ - 20} }{4} }  = 1.8 \times  {10}^{ - 7}

S = 1.8 × 10-⁷ M

The molar solubility of Cu(OH)2 is 1.8 × 10-⁷ M

Solubility of Cu (OH)2 =

Cu (OH)2 =  \frac{1.8 \times  {10}^{ - 7} mol \:Cu (OH)2 }{1L}  \times  \frac{97.546 \: g \: Cu (OH)2}{1 \: mol \: Cu (OH)2}  \\  = 1.75428 \times 10 ^{ - 5}

<h3>Solubility of Cu (OH)2 = 1.75428 × 10 -⁵ g/ L</h3>

I hope I helped you^_^

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