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3 years ago

Why some metals are more dense than others

1 answer:

8 0

This is due to the tightly packed crystal lattice of the metallic structure. The larger the amounts of delocalized electrons, the stronger the metallic bonds are.

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An aqueous solution is prepared by dissolving 15.6 g of Cu(NO3)2 ⋅ 6 H2O in water and diluting to 345 mL of solution. What is th

Vladimir [108]

<u>Answer:</u> The molarity of $NO_3^-$ ions in the solution is 0.306 M

<u>Explanation:</u>

To calculate the molarity of solution, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (in mL)}}$

We are given:

Mass of solute $(Cu(NO_3)_2.6H_2O)$ = 15.6 g

Molar mass of $(Cu(NO_3)_2.6H_2O)$ = 295.6 g/mol

Volume of solution = 345 mL

Putting values in above equation, we get:

$\text{Molarity of }Cu(NO_3)_2.6H_2O=\frac{15.6g\times 1000}{295.6g/mol\times 345mL}\\\\\text{Molarity of }Cu(NO_3)_.6H_2O=0.153M$

As, 1 mole of $(Cu(NO_3)_2.6H_2O)$ produces 1 mole of copper (II) ions and 2 moles of nitrate ions.

So, molarity of $NO_3^-$ ions = (2 × 0.153) = 0.306 M

Hence, the molarity of $NO_3^-$ ions in the solution is 0.306 M

3 0

3 years ago

How many molecules of hydrogen chloride gas could theoretically be produced at STP by reacting 34.7 liters of hydrogen gas at ST

Kamila [148]

Answer:

69.4

Explanation:

There isn't one, I just took the test.

7 0

3 years ago

i killed someone now what?? police are surrounding my house im hiding in my closet i don't know why im on this app but maybe i c

timurjin [86]

What’s your address i’ll send the police to help you

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3 years ago

Which of the following is an example of a contact force?

Virty [35]

C. A person pushing a box across the floor

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3 years ago

Read 2 more answers

The process of fermentation involves chemical reactions that convert solid glucose (C6H12O6) into aqueous ethanol and carbon dio

Sidana [21]

Explanation:

The glucose molecules changes as following:

C6H12O6 —> C2H5OH + CO2

There are 12 atoms of H on the left side and 6 atoms of the right side. It can be balance by putting 2 in front of C2H5OH as shown below:

C6H12O6 —> 2C2H5OH + CO2

There are 6 atoms of C on the left side and 5 atoms on the right side. It can be balance by putting 2 in front of CO2 as shown below:

C6H12O6 —> 2C2H5OH + 2CO2

4 0

3 years ago