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3 years ago

Most of the mass of an atom comes from the (blank) and (blank)

Chemistry

2 answers:

dsp733 years ago

5 0

Protons and neutrons make up most of an atom's mass. Electrons have almost no mass.

sveticcg [70]3 years ago

3 0

The protons and neutrons make up most of the atoms mass because they are located in the nucleus, and the nucleus has the most mass.

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Which of the following will increase the rate of disolving?

Fantom [35]

Answer:

I have no idea bro

Explanation:

I feel you

3 0

3 years ago

Manganese commonly occurs in nature as a mineral. The extraction of manganese from the carbonite mineral rhodochrosite, involves

hjlf

This is an incomplete question, here is a complete question.

Manganese commonly occurs in nature as a mineral. The extraction of manganese from the carbonite mineral rhodochrosite, involves a two-step process. In the first step, manganese (II) carbonate and oxygen react to form manganese (IV) oxide and carbon dioxide:

$2MnCO_3(s)+O_2(g)\rightarrow 2MnO_2(s)+2CO_2(g)$

In the second step, manganese (IV) oxide and aluminum react to form manganese and aluminum oxide:

$3MnO_2(s)+4Al(s)\rightarrow 3Mn(s)+2Al_2O_3(s)$

Write the net chemical equation for the production of manganese from manganese (II) carbonate, oxygen and aluminum. Be sure your equation is balanced.

Answer : The net chemical equation for the production of manganese is:

$6MnCO_3(s)+3O_2(g)+8Al(s)\rightarrow 6CO_2(g)+6Mn(s)+4Al_2O_3(s)$

Explanation :

The given two chemical reactions are:

(1) $2MnCO_3(s)+O_2(g)\rightarrow 2MnO_2(s)+2CO_2(g)$

(2) $3MnO_2(s)+4Al(s)\rightarrow 3Mn(s)+2Al_2O_3(s)$

First we are multiplying reaction 1 by 3, and reaction 2 by 2, we get:

(1)

(2) $6MnO_2(s)+8Al(s)\rightarrow 6Mn(s)+4Al_2O_3(s)$

Now we are adding both the reactions, we get the overall chemical reaction.

$6MnCO_3(s)+3O_2(g)+6MnO_2(s)+8Al(s)\rightarrow 6MnO_2(s)+6CO_2(g)+6Mn(s)+4Al_2O_3(s)$

The $MnO_2$ is common on both side, by cancelling it, we get:

The net chemical equation for the production of manganese is:

$6MnCO_3(s)+3O_2(g)+8Al(s)\rightarrow 6CO_2(g)+6Mn(s)+4Al_2O_3(s)$

5 0

3 years ago

Can a substance be a lewis acid without being a bronsted-lowry acid?argue

storchak [24]

Answer:

Yes

Explanation:

Yes, A substance can be a lewis acid without being a Bronsted-Lowery acid because there are some substances which cannot donate protons(Bronsted-Lowery acid) but can accept a pair of electron.

<u><em>For Example:</em></u>

Let us take the example of BF₃

BF₃ contains no proton so it is not a Bronsted Lowery Acid

However, BF₃ has an incomplete octet with 6 electrons. It needs an electron pair to complete its octet. It accepts a pair of electron to become a Lewis Acid

6 0

3 years ago

Read 2 more answers

In an atom, the number of neutrons determines most specifically the ________.

lord [1]

In an atom, the number of neutrons determines most specifically the isotopes of an element.

<h2>Further Explanation</h2><h3>An atom </h3>

An atom is defined as the smallest particle of an element that can take part in a chemical reaction.
Atoms are made of energy shells and the inner nucleus.
It is also made up of subatomic particles, protons and neutrons.

<h3>Neutrons </h3>

They are sub-atomic particles in an atom that are found in the nucleus of an atom. They have a zero charge or no charge.
Neutrons are slightly heavier than protons.
The number of protons and neutrons in a nucleus of an atom results to the atomic mass number of an atom. Like protons they only take part in nuclear reactions.

<h3>Protons</h3>

Protons are subatomic particles that are found in the nucleus of an atom. They are positively charged. with a charge of +1.
The number of protons differ from one element to another and thus used as the atomic number of an individual element.
The nucleus of an atom is positively charged due to the positive charge of the protons.
Additionally, protons do not take part in chemical reactions but in nuclear reactions.

<h3>Electrons </h3>

They are found orbiting the nucleus on energy shells based on Clouds’ theory. Electrons are negatively charged each with a charge of -1.
The number of electrons and protons in a neutral atom are equal. Additionally they have the least mass of the three sub-atomic particles.
Electrons are the only sub-atomic particles that take part in chemical reactions.

<h3>Isotopes </h3>