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3 years ago

Which element will most easily form positive ions? Why?

Chemistry

1 answer:

Nadusha1986 [10]3 years ago

5 0

Answer:

Barium will form ions most readily because it is most metallic and ions electrons readily and form a positive ion. All these element have 2 valence electrons

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A student tested a sample of carbon (C) by combining it with water. There was no reaction between the carbon and water. The stud

solong [7]

Answer:

No, just because carbon did not react with water, does not mean it wouldn't react with a different compound.

Explanation:

It is common knowledge that carbon is not in group 18, because it is found in all living compounds, and this means it must be reactive with many compounds. We know that water is not very reactive, but it is a good solvent. Meaning that many compounds can dissolve in water, but not chemically react with it. Carbon however is not very soluble because it does not create dipoles or hydrogen bonds. This means it will not show any change when in the presence of water, but if combined with oxygen, can form carbon dioxide.

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3 years ago

Mixture with two or more substances that are evenly mixed

sertanlavr [38]

A homogeneous mixture, the substances are uniformly distributed throughout the mixture

8 0

3 years ago

Which option states the principle behind the law of conservation of mass and the law of conservation of energy?

jeka94

Answer:

Explanation:

The law of conservation of mass states that matter can never be created nor destroyed but can be converted from one form to another.

The law of conservation of energy posits that energy cannot be created nor destroyed but can be converted from one form to another.

These laws are the basic laws of existence. Although the laws have been adjusted, they still form the basic principle behind several scientific laws and are responsible for a whole lot of scientific advancements.

While the first law focuses on matter and the content of matter in a body, the second law basically focuses on energy. The second law serves to support the inter convertibility behind the several forms or types of energy.

For example, to do many useful work at home, it is found that energy is converted from its electric form to say heat in an electric iron to press our clothes.

Also, the first law is a fundamental principle useful in the balancing of our chemical equations.

7 0

3 years ago

The reaction converting glycerol to glycerol-3-phosphate (energetically unfavorable) can be coupled with the conversion of ATP t

Brut [27]

Answer:

glycerol-3-phosphate, ADP, H⁺

Explanation:

The reaction of converting glycerol to glycerol-3-phosphate which makes is unfavorable and is coupled with the second reaction which involves conversion of ATP to ADP which is high energetically favorable.

Reaction 1: Glycerol + HPO₄²⁻ ⇒ Glycerol-3-phosphate + water

Reaction 2: ATP + H₂O ⇒ ADP + HPO₄²⁻ + H⁺

The coupled reaction of both the reactions become favorable. Thus, the overall coupled reaction is:

<u>Glycerol + ATP ⇒ Glycerol-3-phosphate + ADP + H⁺</u>

The net products are = glycerol-3-phosphate, ADP, H⁺

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3 years ago

Directions: Write the balanced equation for each of the following situations. SHOW ALL OF YOUR WORK ON ATTACHED PAGES, OR IT WIL

AveGali [126]

Balanced chemical equation of potassium chlorate heated to form potassium chloride and oxygen:

$2KClO_{3(s)}+\text{heat}\rightarrow2KCl_{(s)}+3O_{2(g)}$

Reaction type: Decomposition reaction.

Now we will use the stoichiometry to calculate the masses of reactants and products after reaction completion.

We are given that the mass of KClO3 = 5.00x10^15 ng = 5000000 g

We will first calculate the number of moles of KClO3 and use the stoichiometry to calculate other masses.

number of moles (n) of KClO3:

n = m/M where m is the mass in grams and M is the molar mass in g/mol

n = (5000000 g)/(122,55g/mol)

n = 40799.67 mol of KClO3

Mass of KCl:

To find the number of moles of KCl, we will use the molar ratio between KClO3:KCl which is 2:2 according to the equation. Therefore number of moles of KCl = 40799.67 mol

m = nM

m = (40799.67 mol) x (74,5513 g/mol)

m = 3041668.707 g

Mass of Oxygen:

We will use the molar ratio between KClO3:O2 which is 2:3, therefore the number of moles of O2 = 40799.67 x (3/2) = 61199.505 mol

m = nM

m = (61199.505 mol) x (15.999 x 2)

m = 1958261.761 g

There should be NO mass of KClO3 after the reaction.

However, initially we had a mass of 5000000 g of KClO3 before the reaction. After the reaction a mass of 3041668.707 g KCl and 1958261.761 g O2 was produced whuch in total is = 4999930.468 g

The mass of KClO3 left = 5000000 g - 4999930.468 g = 69.532 g

7 0

1 year ago