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2 years ago

I will mark brainliest

Chemistry

1 answer:

butalik [34]2 years ago

5 0

Answer:

A. 11

Explanation:

atoms are made of three types of sub atomic particles - protons, neutrons and electrons

Protons are positively charged, electrons are negatively charged and neutrons are neutral.

Protons and neutrons are located inside the nucleus and electrons orbit around the nucleus in energy shells.

Atoms make up an element and atoms are neutral charged with an equal number of protons and electrons. Neutral atom of sodium would therefore have an equal number of positive charges and negative charges.

Since Na has 11 protons, for it to be neutral it would have 11 electrons

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Carbons from acetyl CoA are transferred to the citric acid cycle. Which is the first round of the citric acid cycle that could p

Zielflug [23.3K]

Answer:

In the third step of the citric acid cycle, the oxidation of isocitrate takes place and one molecule of carbon dioxide is released.

Explanation:

In the first step of citric acid cycle, acetylCoA combines with a four-carbon molecule, oxaloacetate, forming a six-carbon molecule, citrate.

In the second step, the citrate in the presence of enzyme anicotase is converted into isocitrate.

In the third step, the oxidation of isocitrate takes place and one molecule of carbon dioxide is released leaving behind one five-carbon molecule called as α-ketoglutarate. During this step, NAD⁺ is reduced to form NADH.

This is first round of the citric acid cycle that could possibly release a carbon atom originating from this acetyl CoA.

On series of reaction, another carbon dioxide molecule also being relased and oxaloacetate is regenerated again.

7 0

2 years ago

How do biologists learn which organisms we're the ancestors of today's plants?

Norma-Jean [14]

by classifying into categories that get smaller and smaller these are the classification steps : life , domain , kingdom , phylum , class, order , family , genus , and species every time you narrow it down the option gets smaller and smaller till there's none left except the species it self .

5 0

2 years ago

Which TWO are most likely to form a compound? C Mg S Ar

lbvjy [14]

Answer is Mr and S as MgS ..

8 0

3 years ago

What is meant by the term chemical reaction

pantera1 [17]

Answer:

<h3> $\huge{ \underline{ \underline { \bold{ \sf{ \orange{See \: below}}}}}}$ </h3>

Explanation:

▪️ $\underline{ \bold{ \sf{ \blue{Chemical \: reaction}}}}$

⇒The composition , decomposition or displacement of molecules of matter during chemical change is called chemical reaction.

▪️ $\underline{ \bold{ \sf{ \purple{ \: Further \: more \: explanation}}}}$

Various conditions bring about these changes. The chemical reactions are represented by chemicalequation. The compounds or elements that take part in chemical reaction are called reactant. They are written at the left side of an arrow that represent a change while the compound or elements that formed after the chemical change are called product. They are written at the right side of the arrow.

▪️ $\underline{ \bold{ \sf{ \purple{For \: example}}}}$

When nitrogen reacts with hydrogen to form ammonia :

Nitrogen + Hydrogen ⇒ Ammonia

N₂ + 3H₂ ⇒ 2NH₃

Presentation of a chemical reaction in the form of equation is called chemical equation . Chemical equation may be word equations or formula equations.

Hope I helped!

Best regards!!

3 0

2 years ago

What does the host mean when he says that the acid has "donated a proton" to the water?

weqwewe [10]

Answer:

Option B

Explanation:

As Brønsted-Lowry theory states, acids are the ones that can donate protons.

When a proton is donated, it is released to become medium more acidic.

HCl is a strong acid.

HCl (l) + H₂O (l) → H₃O⁺ (aq) + Cl⁻(aq)

These always reffers to strong acid where the dissociation is 100% completed.

In a weak acid, dissociation is not 100% complete, that's why we have an equilibrium.

HA (l) + H₂O (l) ⇄ H₃O⁺ (aq) + A⁻(aq) Ka

5 0

2 years ago