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Paha777 [63]
3 years ago
11

Mrs tuckers class is doing an experiment they fill up a cup with ice water they measure the temperature of both the water and th

e classroom after one hour . what will mrs tucker observe about the temperature of ice water after one hour
A. The temperature will increase
B. The temperature Will remain the same
C. The temperature will decrease greatly
D. The temperature Will decrease slightly
​
Chemistry
1 answer:
ELEN [110]3 years ago
8 0
C.


Hope this is the correct answer
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How many moles is 287.7 grams of Iridium (Ir)?
OLga [1]
<h3>Answer:</h3>

1.497 mol Ir

<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>

  • Reading a Periodic Table

<u>Stoichiometry</u>

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

<u>Step 1: Define</u>

287.7 g Ir

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

[PT] Molar Mass of Ir - 192.22 g/mol

<u>Step 3: Convert</u>

  1. Set up:                                 \displaystyle 287.7 \ g \ Ir(\frac{1 \ mol \ Ir}{192.22 \ g \ Ir})
  2. Multiply/Divide:                   \displaystyle 1.49672 \ mol \ Ir

<u>Step 4: Check</u>

<em>Follow sig fig rules and round. We are given 4 sig figs.</em>

1.49672 mol Ir ≈ 1.497 mol Ir

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