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zmey [24]
3 years ago
5

What is the molality of solution prepared by dissolving 21.7g KCl in 225g of water?

Chemistry
2 answers:
notka56 [123]3 years ago
5 0

Answer:

D

Explanation:

erastova [34]3 years ago
4 0
The answer to your question will be D. 1.29m
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How many moles in 4.93 x 10E23 atoms of silver?
leva [86]
<h3>Answer:</h3>

0.819 mol Ag

<h3>General Formulas and Concepts:</h3>

<u>Math</u>

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right<u> </u>

<u>Chemistry</u>

<u>Atomic Structure</u>

  • Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

<u>Stoichiometry</u>

  • Using Dimensional Analysis
<h3>Explanation:</h3>

<u>Step 1: Define</u>

4.93 × 10²³ atoms Ag

<u>Step 2: Identify Conversions</u>

Avogadro's Number

<u>Step 3: Convert</u>

  1. Set up:                              \displaystyle 4.93 \cdot 10^{23} \ atoms \ Ag(\frac{1 \ mol \ Ag}{6.022 \cdot 10^{23} \ atoms \ Ag})
  2. Divide:                              \displaystyle 0.818665 \ mol \ Ag

<u>Step 4: Check</u>

<em>Follow sig fig rules and round. We are given 3 sig figs.</em>

0.818665 mol Ag ≈ 0.819 mol Ag

8 0
2 years ago
What is the molality of a solution of 10 g NaOH in 500 g water?<br>Molar mass NaOH = 40 g​
umka2103 [35]

Explanation:

Moles of NaOH = 10g / (40g/mol) = 0.25mol.

0.25mol / 500g = 0.50mol / 1000g = 0.50mol/dm³.

The molarity is 0.50mol/dm³.

4 0
2 years ago
Ionic compounds can conduct electricity when dissolved in water due to the presence of free floating ions.
tankabanditka [31]

Answer:

True

Explanation:

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2 years ago
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hodyreva [135]
They have the same amount but if you count the wrist it was more then the leg and ankle.
6 0
3 years ago
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Write your answer as a proper fraction or mixed number in reduced form. (I'm abit stuck so some help would do)
DanielleElmas [232]
Your answers would 35/3, 11 2/3, and 11.6 !! :D
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2 years ago
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