2 years ago

What is the density of a bar of silver with a mass of 68 g and a volume of 6.5 cm3?

Chemistry

1 answer:

Fudgin [204]2 years ago

3 0

The answer choice is B. <span>10.50 g/cm3</span>

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A chemist prepares a solution of sodium carbonate by measuring out of sodium carbonate into a volumetric flask and filling the f

Vadim26 [7]

Answer:

The correct answer will be " $9.45\times 10^{-5} \ mol/L$ ".

Explanation:

We have:

Moles of solute (Na₂Co₃) = $18.9 \mu \ mol$

= $18.9\times 10^{-6}$

$1 \mu \ mol$ = $10^{-6} \ mol$

Now,

The volume of the solution will be:

⇒ $0.200 \ L$

∴ ${1 \ mL=0.001 \ L}$

The formula to find the concentration will be:

⇒ $Concentration = \frac{moles \ of \ solute \ (mol)}{Volume \ of \ solution \ (L)}$

On substituting the given values, we get

⇒ $=\frac{18.9\times 10^{-6}}{0.200}$

⇒ $=9.45\times 10^{-5} \ mol/L$

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2 years ago

True or False:

rodikova [14]

Answer: true

Explanation:hope this helps

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An aqueous solution at 25 °C has a pOH of 12.42. Calculate the pH. Round your answer to 2 decimal places

love history [14]

Answer:

pH=1.58

Explanation:

As we know that

pH+pOH=14

Given that pOH=12.42

we get pH=14-pOH

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2 years ago

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Vinil7 [7]

Answer:

they would benefit

Explanation:

they would benefit because we can move more machines that reduce pollution in those countries.

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2 years ago

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Answer:

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