What is carbon dioxide an example of?

Chemistry

2 answers:

Vlada [557]3 years ago

8 0

Carbon Dioxide is an example of a gas and chemical compound.

taurus [48]3 years ago

8 0

We breath in oxygen, and breath out carbon dioxide, plants breath in carbon dioxide and breath out oxygen. Carbon dioxide can also be pollution from cars.

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What percentage of the mass of hydrofluoric acid (HF) is contributed by hydrogen?

Morgarella [4.7K]

This problem is asking for the percent by mass of hydrogen in hydrofluoric acid. At the end, the answer turns out to be D. 5% as shown below:

<h3>Percent compositions:</h3>

In chemistry, percent compositions are used for us to know the relative amount of a specific element in a compound. In order to do so for hydrogen, we use the following formula, which can also be applied to any other element in a given compound:

$\% H=\frac{m_H*1}{M_{HF}}*100\%$

Where $m_H$ stands for the atomic mass of hydrogen and $M_{HF}$ for the molar mass of hydrofluoric acid. In such a way, we plug in the atomic masses of hydrogen (1.01 g/mol) and fluorine (19.0 g/mol) to obtain: