Everything on Earth can be easily described in terms of one of four forms of matter: solid, liquid, gas, and plasma. Students are familiar with the three common forms of matter: solids, liquids, and gases. A solid is an object that has a form.
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Answer:
The correct answer is "#moles / Liter solution".
Explanation:
The expression that best defines molarity is:
M = m / l
Where:
M: Molarity
m: number of moles
l: one liter of solution
It is defined as the concentration of a solution expressed in the number of moles dissolved per liter of solution. In this way, the definition coincides with the formula expressed above.
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Answer:
3.25
Explanation:
We don't have to do calculations with volumes and concentrations.
We just have to remember that, at the midpoint in the titration of a weak acid by a strong base,
pH = pKₐ
For formic acid,
pKₐ = 3.25, so, at the midpoint,
pH = 3.25
The first graph below shows the titration curve for your acid. The endpoint is at about 13 mL, so the midpoint is at 6.5 mL, and the pH is about 3.2.
In the second graph, the concentration of formic acid has increased by 50% to 0.573 mol·L⁻¹, so the endpoint has moved to about 19.5 mL and the midpoint is around 9.8 mL. However, the pH at the midpoint is still about 3.2.
This shows that the pH at the midpoint depends only on the pKₐ of the acid.
I’m pretty sure it is B if not then C. And please can you mark me brainliest?
<u>Answer:</u> The mass of water required is 18.52 g
<u>Explanation:</u>
The number of moles is defined as the ratio of the mass of a substance to its molar mass.
The equation used is:
......(1)
Given mass of magnesium hydroxide = 30.0 g
Molar mass of magnesium hydroxide = 58.32 g/mol
Plugging values in equation 1:
The given chemical equation follows:
By the stoichiometry of the reaction:
If 1 mole of magnesium hydroxide produces 2 moles of water
So, 0.5144 moles of magnesium hydroxide will react with = of water
Molar mass of water = 18 g/mol
Plugging values in equation 1:
Hence, the mass of water required is 18.52 g