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slavikrds [6]
3 years ago
9

A block of aluminum occupies a volume of 15.0 mL and weighs 40.5 g. What is its density?

Chemistry
1 answer:
Rzqust [24]3 years ago
7 0

Answer: d=2.70 g/mL

I think

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if 3.26 g of FeNO33 is dissolved in enough water to make exactly what is the molar concentration of nitrate ion g
Tanzania [10]

Answer:

0.404M

Explanation:

...<em>To make exactly 100.0mL of solution...</em>

Molar concentration is defined as the amount of moles of a solute (In this case, nitrate ion, NO₃⁻) in 1 L of solution.

To solve this question we need to convert the mass of Fe(NO₃)₃ to moles. As 1 mole of Fe(NO₃)₃ contains 3 moles of nitrate ion we can find moles of nitrate ion in 100.0mL of solution, and we can solve the amount of moles per liter:

<em>Moles Fe(NO₃)₃ -Molar mass: 241.86g/mol-:</em>

3.26g * (1mol / 241.86g) =

0.01348 moles Fe(NO₃)₃ * (3 moles of NO₃⁻ / 1mole Fe(NO₃)₃) =

<em>0.0404 moles of NO₃⁻</em>

In 100mL = 0.1L, the molar concentration is:

0.0404 moles of NO₃⁻ / 0.100L =

<h3>0.404M</h3>
5 0
3 years ago
Is the following statement about our solar system true or false?
Archy [21]

Answer:

true

Explanation:

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3 years ago
What is the pH of a solution with a<br> POH of 8.35?
Paha777 [63]

Answer: The pH of the solution is 5.65

Explanation:

The relationship between the pH and the pOH is that pH+pOH=14.

Given this, we can plug in the pOH and subtract that from 14.

14-pOH=pH\\14-8.35=5.65

I hope this helped! Pls give brainliest!! :)

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Why is it important to use the net force instead of the applied force when calculating the acceleration?
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