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Jlenok [28]
3 years ago
15

3) How many grams of calcium hydroxide are necessary to create 49.5 mL of a 1.55 M solution?

Chemistry
1 answer:
egoroff_w [7]3 years ago
8 0

Answer:

5.68g

Explanation:

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What is an element? Arrow
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One arrow is positioned in each box according to Hund's Rule which tells us to maximise the number of unpaired electrons in orbitals of the same subshell, and, to give those electrons the same "spin" (parallel spin).

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What mass of solid lead would displace exactly 234.6 liters of water?
eimsori [14]
Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.

The mass of solid lead would displace exactly 234.6 liters of water should be <span>2,674,440</span>
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How many grams of K2Cr207 are in 250. mL of 0.500M of K2Cr207:
goldenfox [79]

<u>Analysing the Question:</u>

We are given a 250 mL solution of 0.5M K₂Cr₂O₇

Which means that we have:

0.5 Mole in 1L of the solution

0.125 moles in 250 mL of the solution      <em>[dividing both the numbers by 4]</em>

<em />

<u>Mass of K₂Cr₂O₇ in the given solution:</u>

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<em>we know that we have 0.125 moles in the 250 mL solution provided</em>

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Mass = 0.125 * 194

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7 0
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lesantik [10]
True, an atoms nucleus has both protons and electrons.
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