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Semmy [17]
3 years ago
7

A student described two properties of a substance as shown.

Chemistry
1 answer:
AnnZ [28]3 years ago
3 0

Answer:

X is a chemical property and Y is a physical property.

Explanation:

i did it.

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A) ambos pertencem ao 5o período da Tabela Periódica;
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Answer:

A

Explanation:

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When reacting 45g of magnesium with oxygen, 50.0g of magnesium oxide is produced. Calculate the theoretical yield and percent yi
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5 0
3 years ago
ANSWER QUICK PLEASE AND THANK YOU
madreJ [45]

One oxygen atom shares two electron with two hydrogen atoms in this way water molecules are formed. The bond between oxygen and hydrogen is covalent bond.

<h3>What is covalent bond ?</h3>

An electron exchange that results in the formation of electron pairs between atoms is known as a covalent bond. Bonding pairs or sharing pairs are the names given to these electron pairs.

Covalent bonding is the stable equilibrium of the attractive and repulsive forces between atoms when they share electrons.

According to the amount of shared electron pairs, there are three different forms of covalent bonds. single covalent bond is one type of covalent bond. covalent double bond and covalent triple bond.

Thus, option B is correct .

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8 0
1 year ago
Which of the following correctly describes a compound?
ivann1987 [24]

Answer:they are chemically bound together and they retain their individual physical and chemical properties

Explanation:

8 0
3 years ago
Read 2 more answers
The kilocalories in one can of cola if it has 40. g of carbohydrate and no fat or<br> protein
Marysya12 [62]

Answer:

One can of cola contain 0.16 kcal of carbohydrates.

Explanation:

Given data:

mass of cola can = 40 g

kilocalories of carbohydrates = ?

Solution:

we know that there are 4 cal of carbohydrates per gram.

40 g × 4 cal/g = 160 cal

Now we will convert calories into kilocalories. There are 1000 calories in one kilocalories so,

160/1000 = 0.16 kcal

so, one can of cola contain 0.16 kcal of carbohydrates.

6 0
3 years ago
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