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alina1380 [7]
3 years ago
15

A piece of chocolate with a mass of 8 grams melts. What is the mass of the melted chocolate?

Chemistry
1 answer:
LiRa [457]3 years ago
7 0

Answer:

The mass of the melted chocolate is 8 grams.

Explanation:

When something is melted including chocolate the mass remain the same or does not change, it is only the motion of the particles that changes and this is called law of conservation of mass.

The law states that mass can neither be created nor destroyed during chemical reaction but it remain the same.

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Liters of a 2.40 M
kotykmax [81]

Answer:

1.42 L

Explanation:

Step 1:

The following data were obtained from the question :

Molarity of KBr = 2.40 M

Mole of KBr = 3.40 moles

Volume of solution =?

Step 2:

Determination of the volume of the solution.

Molarity of solution is simply the mole of the solute per unit volume the of solution. It is given as :

Molarity = mole /Volume

Volume = mole /Molarity

Volume = 3.4/2.4

Volume = 1.42 L

Therefore, the volume of the solution is 1.42 L

6 0
3 years ago
20. Which of the following are pure substances?
Juliette [100K]
The answer is III and V
3 0
3 years ago
How many moles of hydrogen are in 3.0 moles of C6H12O6?
tangare [24]
<h3>Answer:</h3>

              36 moles of Hydrogen

<h3>Solution:</h3>

The molecular formula of Glucose is,

                                                 C₆H₁₂O₆

As clear from molecular formula, each mole of Glucose contains 12 moles of Hydrogen atoms.

Therefore,

                 1 mole of C₆H₁₂O₆ contains  =  12 moles of Hydrogen

So,

       3.0 moles of C₆H₁₂O₆ will contain  =  X moles of Hydrogen

Solving for X,

                        X =  (3.0 mol × 12 mol) ÷ 1 mol

                        X  =  36 moles of Hydrogen

8 0
2 years ago
Read 2 more answers
What is the [OH-] if the [H3O+] is 1 x 10 -6?
Mariulka [41]

The answer is [OH⁻] = 1 x 10⁻⁸.

To find OH⁻, divide the ionic product of water by [H₃O⁺] as :

<u>OH⁻ + H₃O⁺ = H₂O</u>

<u />

  • [OH⁻] = 1 x 10⁻¹⁴ / 1 x 10⁻⁶
  • [OH⁻] = 1 x 10⁻⁸
5 0
2 years ago
For which of the following conversions does the value of the conversion factor depend upon the formula of the substance?
pochemuha

For which of the following conversions does the value of the conversion factor depend upon the formula of the substance?

The answer is C

3 0
3 years ago
Read 2 more answers
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