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professor190 [17]
3 years ago
5

Mary Sue is making caramel ice cream. In the first part of the process, she combines a cup of sugar and a cup of water in a sauc

epan. She cooks the mixture over medium heat until the sugar melts and browns to a light amber color. Then she adds the same amount of water to the mixture along with a cup and a half of cream and milk. Which part of the preparation indicated a chemical change? A. adding cream and milk to the mixture B. mixing the sugar with water C. melting the sugar D. sugar changes from white to a light amber color
Chemistry
2 answers:
bulgar [2K]3 years ago
6 0
<span>D. sugar changes from white to a light amber color</span>
Readme [11.4K]3 years ago
5 0
<h2>Answer : Option D) Sugar changes from white to a light amber color.</h2><h3>Explanation : </h3>

The chemical change which was observed during the preparation of caramel was in the step of making sugar into a caramel syrup. Where white sugar was used and on heating it changed the white color to light amber color. There was a chemical reaction that took place and it changed the color of the sugar into amber which is an irreversible change. Therefore, this is the correct option for the chemical change.

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Maryann and josh left a cup of ocean water in the sun. When they returned a day later only salt was left in the cup. Which best
Alex777 [14]

Answer:

The water was evaporated from the sun only leaving salt in the cup

Explanation:

the sun done its cycle and the salt was left

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3 years ago
How does solid neon compare to liquid neon?
Lapatulllka [165]

Answer:

The liquid molecules stay towards the bottom but one or two do make it all the way to the top. The molecules in the gas are also moving faster than the molecules in the liquid phase.

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The mass of a compound is taken 5 times with the following results: 26.6 mg, 26.3 mg, 26.2 mg, 26.4 mg, and 26.1 mg. If
Maru [420]

Answer:

2.813%

Explanation:

First, we must take the average of the five mass measurements

Average value= sum of all five trials/ 5= 26.6 + 26.3 + 26.2 + 26.4 +26.1 /3 = 26.32mg

Now, we have been provided the accurate mass of the compound in the question as 25.6mg

Remember that relative percent error = Average value of measurement - True value of measurement / true value×100

Hence we have;

Percent error=

26.32 - 25.6/25.6 ×100

Percent error= 2.813%

7 0
3 years ago
Which is not a property of a pure substance?
mr Goodwill [35]

varying composition is not a property of a pure substance

8 0
3 years ago
TNT is manufactured by the reaction of toluene with nitric acid according to the following equation: C7H8 (l) + 3 HNO3 (aq) ---&
den301095 [7]

Answer:

170. g C₇H₅(NO₂)₃

General Formulas and Concepts:

<u>Chemistry - Stoichiometry</u>

  • Reading a Periodic Table
  • Using Dimensional Analysis

Explanation:

<u>Step 1: Define</u>

RxN:   C₇H₈ (l) + 3HNO₃ (aq) → C₇H₅(NO₂)₃ (s) + 3H₂O (l)

Given:   69.0 g C₇H₈ (Toluene)

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

Molar Mass of C - 12.01 g/mol

Molar Mass of H - 1.01 g/mol

Molar Mass of N - 14.01 g/mol

Molar Mass of O - 16.00 g/mol

Molar Mass of C₇H₈ - 7(12.01) + 8(1.01) = 92.15 g/mol

Molar Mass of C₇H₅(NO₂)₃ - 7(12.01) + 5(1.01) + 3(14.01) + 6(16.00) = 227.15 g/mol

<u>Step 3: Stoichiometry</u>

<u />69.0 \ g \ C_7H_8(\frac{1 \ mol \ C_7H_8}{92.15 \ g \ C_7H_8} )(\frac{1 \ mol \ C_7H_5(NO_2)_3}{1 \ mol \ C_7H_8} )(\frac{227.15 \ g \ C_7H_5(NO_2)_3}{1 \ mol \ C_7H_5(NO_2)_3} ) = 170.085 g C₇H₅(NO₂)₃

<u>Step 4: Check</u>

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

170.085 g C₇H₅(NO₂)₃ ≈ 170. g C₇H₅(NO₂)₃

3 0
3 years ago
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