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Julli [10]
2 years ago
6

PLEASE ANSWER WILL MARK BRAINLIST

Chemistry
1 answer:
Harman [31]2 years ago
8 0
To find the experimental value I believe we add up all the temperatures found by each trial and divide by the number of trials

When added up and divided up this is 50.7 C

Then we continue with accepted value minus experimental value over accepted

53.0 - 50.7 / 53.0 x 100

4.3% percent error






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Answer:

The correct answer is Option

B. A homogeneous mixture

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Which of these processes indicates that smelting copper is a chemical change?
Elan Coil [88]

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3 years ago
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What is the molarity of a solution prepared by dissolving 30.0 grams of NaOH in enough water to make a solution with a total vol
Simora [160]

Answer:

\fbox{0.3125 M}

Given:

  • Given mass of NaOH = 30 gram
  • Molar mass of NaOH = 40 gram
  • Volume = 2.40 litres

To find:

Molarity = ?

Solution:

<em>Molarity is nothing but the number of moles of solute dissolved in per litre of solution. given by </em><em>formula,</em>

Molarity =  \frac{given  \: mass}{molar \: mass  \times Volume}

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2 years ago
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3 years ago
What substance is oxidized in the following reaction? 4HCl + MnO2 → Cl2 + 2H2O + MnCl2
Blizzard [7]

Answer:

Cl⁻ was oxidized.

Explanation:

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On the left side of the equation, Cl has a charge of -1 (in HCl); while on the right side of the equation Cl has a charge of 0 in Cl₂.

Thus, Cl⁻ was oxidized.

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