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stealth61 [152]
3 years ago
9

Living things are made mostly of what four main elements

Chemistry
1 answer:
Romashka [77]3 years ago
5 0

CARBON

HYDROGEN

NITROGEN

OXYGEN

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How many molecules of water of water are in a 821.3 g sample
svetlana [45]

Answer: 2.744 x 1025 molecules

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One molecule is made of two or more _____ bonded together.
gayaneshka [121]

Answer:

              One molecule is made of two or more atoms bonded together.

Explanation:

                    Molecule is a substance which is made up chemically by two or more same or different atoms. The atoms joint together in a molecule due to a chemical bond. This chemical bond is formed either by mutual sharing of electrons or transfer of electrons between two atoms.

Examples:

A molecule of H₂O (water) is made up of two atoms of Hydrogen and one atom of Oxygen (H-O-H).

A molecule of CO₂ (Carbon Dioxide) is formed when a carbon atom is bonded to two oxygen atoms via a double bonds (O=C=O).

A  molecule of N₂ (Nitrogen Gas) is formed between two nitrogen atoms through a triple bond (N≡N).

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Check my answers please? Only 5...Will reward medal to best answer and perhaps become a fan! :)
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The correct answer is <span>Fusion Curve</span>
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3 years ago
What are the gas laws? (Include Boyle's law, charles's law, gay lussac's law, an avogadro's law) Could someone please summarize
Rina8888 [55]

Answer:

Boyle's Law: When the pressure of a gas increases, the volume of the gas will decrease as long as the temperature and amount of gas are constant.

So basically pressure is inversely proportional to Volume, when one increases, the other decreases, vice versa.

Equation: P_{1} V_{1} = P_{2} V_{2}

Charles Law: When the temperature of a gas increases, the volume of a gas will also increase if the pressure and amount of gas are constant.

So basically Temperature and volume are directly proportional.

Equation: \frac{V_{1}}{T_{1}} = \frac{V_{2} }{T_{2} }

Gay Lussac's Law: When the temperature of a gas increases, the pressure of a gas also increases when volume and the amount of gas remain constant.

Basically, Temperature and Pressure are directly proportional.

Equation: \frac{P_{1}}{T_{1}} = \frac{P_{2} }{T_{2} }

Avogadro's Law: The most intuitive gas law. When you increase the amount of gas, the volume will also increase.

Meaning the moles (amount of gas) is directly proportional to volume.

Equation: \frac{V_{1} }{n_{1} } = \frac{V_{2} }{n_{2} } (n stands for moles)

There is a combined gas law and ideal gas law but those are just the gas laws mentioned above but combined together. These should be everything.

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