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Sauron [17]
4 years ago
12

Sugar is used for energy by almost all organisms on Earth. In cells, sugar combines with oxygen and forms carbon dioxide and wat

er.
When sugar combines with oxygen to form these products, is it a physical or a chemical change, and why?

1.)a physical change, because oxygen is involved in the change
.)a physical change, because the atoms that make up sugar rearrange to form the products
3.)a chemical change, because oxygen is involved in the change
4.)a chemical change, because the atoms that make up sugar rearrange to form the products
Chemistry
2 answers:
Tju [1.3M]4 years ago
3 0

Answer:

Explanation:

chemical change as sugar reacts w O2 to form CO2 n water - reason is not cuz' of O2 but the re-arrangement to form CO2.

ans is 4.)a chemical change, because the atoms that make up sugar rearrange to form the products

Ksivusya [100]4 years ago
3 0

Answer:

Explanation:

When sugar combines with oxygen to form carbon dioxide and water, it is a chemical reaction. The carbon and hydrogen molecules in sugar re-arrange to join with oxygen to form carbon dioxide and water.

So the answer is 4.)a chemical change, because the atoms that make up sugar rearrange to form the products.

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0.378g grams of a compound is made up of 0.273g of Mg and 0.105g nitrogen. Find its empirical formula.
Harrizon [31]

Answer:

The empirical formula of the compound is Mg_3N_2.

Explanation:

Mass of magnesium in compound = 0.273 g

Mass of nitrogen in the compound = 0.105 g

Moles of magnesium =\frac{0.273 g}{24.305 g/mol}=0.0112 mol

Moles of nitrogen = \frac{0.105 g}{14.0067 g/mol}=0.00750 mol

Form empirical formula divides the lowest value of moles of an element present with all the moles of elements present.

Magnesium =\frac{0.0112 mol}{0.00750 mol}=1.5

Nitrogen =\frac{0.00750mol}{0.00750 mol}=1

The empirical formula of a compound:

Mg_{1.5}N_1=Mg_{\frac{15}{10}}N_1=Mg_{15}N_{10}=Mg_3N_2

The empirical formula of the compound is Mg_3N_2.

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3 years ago
Use the diagram to answer each question.
Naya [18.7K]

Answer:

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Explanation:

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3 years ago
Your bedroom air conditioner blows very cold air at night but only cool air during the day. Your bedroom gets lots of direct sun
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What is the experiment

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What happens to the total mass of a carbon and oxygen after they form carbon dioxide
OLEGan [10]

C + O2 = CO2

nothing will happen since if you look at the equation the reactant and product are equal and no new product is formed

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4 years ago
In which of the following is the solution concentration expressed in terms of molarity?
puteri [66]
Answer:
D. <span>10 mol of solute/ 1L of solution

Explanation:
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This means that molarity has the units moles/liter

The only option satisfying this is the last one.

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8 0
3 years ago
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