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Murrr4er [49]
3 years ago
12

Which of the following is an

Chemistry
2 answers:
oksano4ka [1.4K]3 years ago
4 0

Answer:

fire burning wood, fire is a chemical and it creates charred wood

Zepler [3.9K]3 years ago
4 0
The answer is fire burning wood
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A substance with two or more different types of atoms chemically bonded together is called....
Slav-nsk [51]

Answer:

D

Explanation:

7 0
3 years ago
What is the mole fraction of sodium chloride in solution that is 13. 0 y mass sodium chloride and that has a density of 1. 10 g/
lyudmila [28]

Mole fraction is the ratio of the constituent moles to the total constituents. The mole fraction of sodium chloride is 0.0443.

<h3>What is a mole fraction?</h3>

A mole fraction is the proportion of the moles of the component in a total component present.

In 100 gm of solution 13.0 5 means, there is 13.0 gm of sodium chloride present. The mass of water is calculated as,

100 - 13.0 = 87.0 gm

Moles of sodium chloride is calculated as:

\begin{aligned} \rm moles &= \rm \dfrac{mass}{molar\; mass} \\\\&= \dfrac{13}{58}\\\\&= 0.224 \;\rm moles\end{aligned}

Moles of water are calculated as:

\begin{aligned} \rm moles &= \rm \dfrac{mass}{molar\; mass} \\\\&= \dfrac{87}{18}\\\\&= 4.83\;\rm moles\end{aligned}

Now, moles fraction is calculated by dividing moles of sodium chloride by total moles as,

\begin{aligned} \text{Mole fraction of NaCl} &= \dfrac{0.224}{0.224 + 4.83}\\\\&= 0.0443\end{aligned}

Therefore, the mole fraction of sodium chloride is 0.0443.

Learn more about mole fraction here:

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7 0
2 years ago
Why are the seasons for the southern hemisphere reversed from the northern hemisphere
MArishka [77]
Becuse the earth rotates the opisate way on the other side of the equator forgive me if im wrong.
5 0
4 years ago
The reaction between calcium acetate and lithium phosphate forms a white precipitate (the insoluble compound calcium phosphate),
kenny6666 [7]

Hello!


The coefficient for Lithium Acetate in the balanced chemical equation is 6


Why?


This is the reaction:


(CH₃COO)₂Ca(aq) + Li₃PO₄(aq) → Ca₃(PO₄)₂(s) + CH₃COOLi(aq)


For balancing the equation, we're going to apply the Law of Conservation of Mass, which states that matter is not created nor destroyed, and the number of atoms of each element should be the same on both sides of the equation, from that, the balanced equation is:


3(CH₃COO)₂Ca(aq) + 2Li₃PO₄(aq) → Ca₃(PO₄)₂(s) + 6CH₃COOLi(aq)


Have a nice day!

3 0
4 years ago
Avogadro's number of a chemical substance represents
olchik [2.2K]

Answer:

Avogrado no of a chemical substance represents 6.02×1023 particles

4 0
3 years ago
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