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Monica [59]
3 years ago
15

Someone please help will mark as brainliest

Chemistry
1 answer:
Tju [1.3M]3 years ago
5 0

Answer: The answer is D.

Explanation: The warm water will cause the sugar to dissolve quicker.

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How many formula units make up 10.2 g of magnesium chloride (MgCl2)?
beks73 [17]

Answer:

6.46×10²² formula units

Explanation:

From the question given above, the following data were obtained:

Mass of MgCl₂ = 10.2 g

Number of formula units =?

From Avogadro's hypothesis,

1 mole of MgCl₂ = 6.02×10²³ formula units

But,

1 mole of MgCl₂ = 24 + (35.5×2) = 24 + 71 = 95 g

Thus, we can say:

95 g of MgCl₂ = 6.02×10²³ formula units

Finally, we shall determine the formula units in 10.2 g MgCl₂. This can be obtained as follow:

95 g of MgCl₂ = 6.02×10²³ formula units

Therefore,

10.2 g of MgCl₂ = (10.2 × 6.02×10²³) / 95

10.2 g of MgCl₂ = 6.46×10²² formula units

Thus, 10.2 g of MgCl₂ contains 6.46×10²² formula units

6 0
3 years ago
5/10
julsineya [31]

Answer:

B.

Explanation:

This is physical change as the popcorn has expanded in size.

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