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choli [55]
3 years ago
9

How many grams of sodium chloride are in 250mL of a 2.5M NaCI solution

Chemistry
1 answer:
Elden [556K]3 years ago
4 0
I think I did this right.

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An ionic compound has a very positive heat of solution in water. Would you expect it to be very soluble or insoluble in water?
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3 years ago
What is the mass in grams of 7.5 x 10^15 atoms of nickel, Ni?
statuscvo [17]
<h3>Answer:</h3>

7.3 × 10⁻⁷ g Ni

<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>Chemistry</u>

<u>Atomic Structure</u>

  • Reading a Periodic Table
  • Using Dimensional Analysis
  • Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.
<h3>Explanation:</h3>

<u>Step 1: Define</u>

7.5 × 10¹⁵ atoms Ni

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

Avogadro's Number

Molar Mass of Ni - 58.69 g/mol

<u>Step 3: Convert</u>

  1. Set up:                              \displaystyle 7.5 \cdot 10^{15} \ atoms \ Ni(\frac{1 \ mol \ Ni}{6.022 \cdot 10^{23} \ atoms \ Ni})(\frac{58.69 \ g \ Ni}{1 \ mol \ Ni})
  2. Multiply:                                                                                                           \displaystyle 7.30945 \cdot 10^{-7} \ g \ Ni

<u>Step 4: Check</u>

<em>Follow sig fig rules and round. We are given 2 sig figs.</em>

7.30945 × 10⁻⁷ g Ni ≈ 7.3 × 10⁻⁷ g Ni

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Explanation:

zusbejdnd.d

shsjsksosbejzjdhdbdjedhd

dudbskwjxbdbdjsijednjzhenejd3jdbvfbsj

susjdjksuwhwudnjwibdghejdooejejdhdbbsndjl2lekkw

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Carbon, hydrogen, and oxygen are always found in what type of molecule?
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