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4 years ago

Which of the following are considered pure substance??

Chemistry

1 answer:

Shkiper50 [21]4 years ago

7 0

Answer:

Explanation:

I’m 99.9% sure that it’s an element because it can’t be broken down any more than it already is.

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Which of the chemical equations is balanced?

Simora [160]

The third equation is properly balanced.

To figure this out, set up tables to check if each element has the same amount on both sides. If you do this for the third equation, copper, hydrogen, oxygen, and nitrogen are all balanced,

The first equation is incorrect due to the fact Iron, Fe, is not balanced on both sides. This is shown by the subscripts given.

The second equation is incorrect as Sulfur is not properly balanced and neither is sodium.

The fourth equation is incorrect as Aluminum is not properly balanced. On the reactants side, Aluminum is 4 while on the products, Aluminum is 8.

Hope this helps!

6 0

3 years ago

Identify and label the Brønsted-Lowry acid, its conjugate base, the Brønsted-Lowry base, and its conjugate acid in each of the f

julia-pushkina [17]

Explanation:

As per Brønsted-Lowry concept of acids and bases, chemical species which donate proton are called Brønsted-Lowry acids.

The chemical species which accept proton are called Brønsted-Lowry base.

(a) $HNO_3 + H_2O \rightarrow H_3O^+ + NO_3^-$

$HNO_3$ is Bronsted lowry acid and $NO_3^-$ is its conjugate base.

$H_2O$ is Bronsted lowry base and $H_3O^+$ is its conjugate acid.

(b)

$CN^- + H_2O \rightarrow HCN + OH^-$

$CN^-$ is Bronsted lowry base and HCN is its conjugate acid.

$H_2O$ is Bronsted lowry acid and $OH^-$ is its conjugate base.

(c)

$H_2SO_4 + Cl^- \rightarrow HCl + HSO_4^-$

$H_2SO_4$ is Bronsted lowry acid and $HSO_4^-$ is its conjugate base.

Cl^- is Bronsted lowry base and HCl is its conjugate acid.

(d)

$HSO_4^-+OH^- \rightarrow SO_4^{2-}+H_2O$

$HSO_4^-$ is Bronsted lowry acid and $SO_4^{2-}$ is its conjugate base.

OH^- is Bronsted lowry base and $H_2O$ is its conjugate acid.

(e)

$O_{2-}+H_2O \rightarrow 2OH^-$

$O_{2-}$ is Bronsted lowry base and OH- is its conjugate acid.

$H_2O$ is Bronsted lowry acid and OH- is its conjugate base.

6 0

4 years ago

Carbon is ideally suited to form ionic bonds. True or false.

ratelena [41]

It is a completely false statement that carbon <span>is ideally suited to form ionic bonds. The correct option among all the options that are given in the question is the second option. Carbon is ideally suited to form covalent bonds. I hope that this is the answer that has actually come to your desired help.</span>

5 0

3 years ago

What is the ph of a solution is 6.10

solong [7]

SO THE PH OF SOLUTION IS ACIDIC IN NATURE BECAUSE PH IS LESS THAN 7 IS ACID

6 0

3 years ago

When air expands what type of energy increases?

LuckyWell [14K]

Heat energy. The heat allows air to expand allowing more space for molecules to move around.

3 0

3 years ago