3 years ago

About 300 B.C., Aristarchus suggested that the sun was at the center of the universe. Why?

1 answer:

7 0

The correct answer is option A and B

About 300 B.C., Aristarchus suggested that the sun was at the center of the universe because a) the brightness of the planets would change and b) the planets appeared to move among the constellations.

18 centuries before Copernicus, Aristarchus predicted that all planets orbit the sun. In other words, he suggested the Solar System is heliocentric.

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Which class of organic compounds contains nitrogen

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Amine is the class of organic compounds that contains nitrogen

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What is the molarity of 2.3 mol of Kl dissolved in 0.5 L of water

Nastasia [14]

Answer:

$4.6\,\,moL\,\,L^{-1}$

Explanation:

Molarity refers to a measure of concentration.

Molarity = moles of solute/Litres of solution

Molarity refers to number of moles of solute present in this solution.

In order to find a solution's molarity, use value for the number of moles of solute and the total volume of the solution expressed in liters

As molarity of 2.3 mol of Kl is dissolved in 0.5 L of water,

Molarity = $\frac{2.3}{0.5} =4.6\,\,moL\,\,L^{-1}$

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Which of the following is a characteristic property of noble gases? A. They only react with each other B. They do not react chem

tresset_1 [31]

Answer:

B.They do not react chemically

Explanation:

This is because all noble gases haves full outer shell therefore they don’t participate in bonding.They are referred to as inert which means unreactive.

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What is the name for SO2

Tanzania [10]

Sulphur Dioxide. Toxic. Don't eat it.

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How does a liquid substance change into gas?

Afina-wow [57]

Answer: heat

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Is that heat boils the liquid and the liquid eventually evaporated into gas

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