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3 years ago

What is the definition of chemistry

Chemistry

1 answer:

Andrei [34K]3 years ago

5 0

<h2>Definition:</h2>

Chemistry is the study of matter, it's properties, how and why substances combine or separate to form other substances, and how substances interact with energy. Chemistry is one of the physical sciences that help us to describe our world.

<h2>sentence examples:</h2>

•chemistry is a little hard.

•chemistry is fun to do!

<h2>synonyms:</h2>

•system

•organizing

•structure

•plan

•standard

•assembly

•design

•formation

•pattern

•method

•construction

<h2>antonyms:</h2>

•imbalance

•disproportion

•disorganizing

<h2>Origin:</h2>

Chemistry comes from Arabic word al-Kimia which means the art of transformation. Chemistry began as the study of alchemy.

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Find the number of moles of water that can be formed if you have 170 mol of hydrogen gas and 80 mol of oxygen gas. Express your

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<u>Answer:</u> The amount of water that can be formed is 160 moles

<u>Explanation:</u>

We are given:

Moles of hydrogen gas = 170 moles

Moles of oxygen gas = 80 moles

The chemical equation for the reaction of hydrogen gas and oxygen gas follows:

$2H_2+O_2\rightarrow 2H_2O$

By Stoichiometry of the reaction:

1 mole of oxygen gas reacts with 2 moles of hydrogen gas

So, 80 moles of oxygen gas will react with = $\frac{2}{1}\times 80=160mol$ of hydrogen gas

As, given amount of hydrogen gas is more than the required amount. So, it is considered as an excess reagent.

Thus, oxygen gas is considered as a limiting reagent because it limits the formation of product.

By Stoichiometry of the reaction:

1 mole of oxygen gas produces 2 moles of water

So, 80 moles of oxygen gas will produce = $\frac{2}{1}\times 80=160moles$ of water

Hence, the amount of water that can be formed is 160 moles

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How is a joule defined?

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A. It is the work done when a force of 1 newton is applied to an object for a distance of 1 meter

Explanation:

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