Which statement describe molecules?

Chemistry

2 answers:

antoniya [11.8K]3 years ago

6 0

Answer:

A group of atoms bonded together by different chemical reactions. It is the smallest fundamental unit of a chemical compound.

Explanation:

castortr0y [4]3 years ago

5 0

Answer:Molecules are made of 2 or more atoms, molecules range in size, and molecules are made of atoms of the same element or different elements

Explanation:

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The pressure inside a gas cylinder is 3,506 mmHg. How many atmospheres of pressure is the gas exerting on the cylinder?

PSYCHO15rus [73]

Below are the choices:

a)0.2168 atm
b)4.613 atm 
c)34.60 atm 
d467.4 atm

1 atm = 760mmHg : Therefore:
3,506mmHg = 3,506/760 = 4.613 atm
B is correct answer.

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Indicate whether each of the following would increase or decrease the rate of reaction

mote1985 [20]

The rate of a chemical reaction is affected by temperature, Catalysts, Suface area, Concentration.

<h3>Rate of reaction</h3>

The rate of a chemical reaction is the rate at which the concentration of reactant molecules decreases or the concentration of product molecules increases.

<h3>Factors effecting rate of chemical reaction </h3>

The factors that affect the rate of chemical reaction include:

Temperature: increase in temperature increases reaction rate while decrease in temperature decreases reaction rate.
Catalysts: the present of catalysts increase the reaction rate. Some catalysts decreases reaction rate and are known as negative catalysts.
Surface area: increase in surface area of reactants increases reaction rate.
Concentration: Increase in concentration of reactants increases reaction rate while decrease in concentration of reactants decreases reaction rate.

Therefore, the rate of a chemical reaction is affected by temperature, Catalysts, Suface area, Concentration.

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Why does foliation occur? (Metamorphic rock)

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Foliation occurs when the pressure squeezes the flat or elongated minerals within a rock so that they become aligned.

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Freezing something makes it solid and melting something makes it a liquid

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Shtirlitz [24]

Answer:
Based on giveninformation, the compound is a Poly Unsaturated fatty acid.

Explanation:
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Those Fatty Acids in which there is no double bond between the carbon chain are called as saturated fatty acids.

Examples:
Lauric Acid CH₃(CH₂)₁₀COOH

Myristic Acid CH₃(CH₂)₁₂COOH

Palmitic Acid CH₃(CH₂)₁₄COOH

ii) Unsaturated Fatty Acids:
Those Fatty Acids in which contain a single double bond (mono-unsaturated) or more than one double bond (poly-unsaturated) d between the carbon atoms in a chain are called as unsaturated fatty acids.

Examples:
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