Describe heat transfer of Getting hot sitting outside in the sun.

Chemistry

1 answer:

nlexa [21]2 years ago

8 0

Answer:

RADIATION is the transfer of Heat energy through space by Electromagnetic Radiation. Most of the electromagnetic radiation that comes to the earth from the Sun is invisible.

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20. In which medium do sound waves move the fastest?

Nataliya [291]

Answer:

D. Solids

Explanation:

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2 years ago

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Using the Hoffman apparatus for electrolysis, a chemist decomposes 2.3 moles of water into its gaseous elements. How many grams

solong [7]

Answer:

2.318032g

Explanation:

-The electrolysis equation of water is written as below:

$2H_2O_{(l)}->2H_2_{(g)}+O_2_{(g)}$

-The mole ratio of Water to the hydrogen formed is 1:1, therefore 2.3 moles of hydrogen gas is produced.

-Hydrogen's molar mass is 1.00784 grams:

$Mass=moles\times molar \ mass\\\\\=2.3\times 1.00784\\\\=2.318032\ g$

Hence, 2.318032 grams of hydrogen is produced.

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3 years ago

What would be the observation when pineapple juice is dipped in a red litmus paper

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Answer:

red litmus paper change into blue when it is dipped into Pineapple juice.

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Ethanol (C2H5OH) and water (H2O) are both liquids at or near room temperature. When a sample of ethanol is poured into a beaker

BaLLatris [955]

Answer:

a. Are miscible because each can hydrogen bond with the other.

Explanation:

Both ethanol and water are miscible. The reason why they can both mix freely is due to the hydrogen bonds that will form between their molecular structure.

Hydrogen bonds are special dipole-dipole attraction between polar molecules in which hydrogen atoms are directly joined to an electronegative atom.

Ethanol has an hydroxyl group which will bond to form an intermolecular bond with the oxygen and hydrogen on the water molecule. This attraction makes them miscible.

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3 years ago

What is the density of a solid that has a mass of 9.2 grams and a volume of 12.3 cm3 ? Would this object float or sink in water?

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