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svetoff [14.1K]
3 years ago
9

What is the conclusive evidence that mixing sugar in the water is a physical change

Chemistry
1 answer:
djyliett [7]3 years ago
8 0
THE DEFINITION OF PHYSICAL CHANGE: Physical changes are changes affecting the form of a chemical substance, but not its chemical composition. Physical changes are used to separate mixtures into their component compounds, but can not usually be used to separate compounds into chemical elements or simpler compounds. so the answer is that the form of the sugar is changing in water but if you boiled the water till its all evaporated all that will be left is the sugar
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How many grams of O2 are needed to react with 18.2 g of NH3?
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Answer:

44 g oxygen are needed.

Explanation:

Given data:

Mass of oxygen needed = ?

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Solution:

Chemical equation:

4NH₃ + 5O₂   →  4NO + 6H₂O

Now we will calculate the number of moles of ammonia:

Number of moles = mass/molar mass

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                        NH₃              :                O₂

                          4                 :                 5

                          1.1                :              5/4×1.1 = 1.375 mol

Mass of oxygen needed:

Mass = number of moles × molar mass

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