2 years ago

Quais são os nomes dos planetas anões

Chemistry

1 answer:

irakobra [83]2 years ago

6 0

Answer:

Can you translate it on English so we can understand

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Describe the concentration of hydronium ions and hydroxide ions when a base is added slowly to a white vinegar solution. The pH

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Explanation:

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5. A 180 mL disinfectant solution contains 85 mL of isopropyl alcohol. Determine the V/V

lyudmila [28]

The % V/V concentration of a 180-mL disinfectant solution containing 85 mL of isopropyl alcohol is 47 % V/V.

<h3>What is the % V/V concentration?</h3>

It refers to the milliliters of solute for every 100 milliliters of solution.

We have 180 mL of a disinfectant solution that contains 85 mL of isopropyl alcohol (solute).

The % V/V concentration of this solution is:

% V/V = (mL solute/mL solution) × 100% =

% V/V = (85 mL/180 mL) × 100% = 47% V/V

Learn more about % V/V here: brainly.com/question/17055828

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1 year ago

Pls help :(

Ilia_Sergeevich [38]

I would say only two

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If an endothermic process absorbs 256j how many kilocalories are absorbed

Finger [1]

There are several units for expressing energy, Most common are joules and kilocalories.

The conversion factor of joule to kilocalories is
1 kilo calorie = 4184 J
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x = $\frac{256}{4184} = 0.0611$ kilo calories

Thus, 256 J = 0.0611 kilocalories

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Why does potassium permanganate need to be standardized right before a titration?.

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To determine the strength of potassium permanganate with a standard solution of oxalic acid.

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