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3 years ago

We discussed many properties and characteristics of acids in this lesson. Which of the following is NOT one that was mentioned?

Chemistry

1 answer:

lys-0071 [83]3 years ago

3 0

Answer: A. Acids have a slippery feel.

Explanation:

Acid : It is a substance that has ability of donating proton or hydrogen ion, $H^+$ .

The properties of an acid are :

Acids are sour in taste.

The texture of an acid solution is sticky.

It changes the color of the litmus paper to red.

It react with a metal to give compound and hydrogen gas.

Base : It is a substance that has ability of donating hydroxide ion, $OH^-$ .

The properties of an base are :

Base are bitter in taste.

The texture of a base solution is slippery.

It changes the color of the litmus paper to blue.

It does not react with a metal.

Thus bases have slippery nature and not acids.

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A piece of iron (C=0.449 J/g°C) and a piece of gold (C=0.128 J/g°C) have identical masses. If the iron has an initial temperatur

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Answer:

The correct answer is B. Since the two metals have the same mass, but the specific heat capacity of iron is much greater than that of gold, the final temperature of the two metals will be closer to 498 K than to 298 K

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2 years ago

Which term describes the molecule shown below h-c-c-h ethyne c2h2?

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molar mass of Na₂SO₄ is - 142 g/mol.
1 mol of Na₂SO₄ has a mass of 142 g.
In 1 mol of Na₂SO₄ the mass of Na is 23 g/mol x 2 = 46 g.

Mass of Na in 1 mol of Na₂SO₄ is - 46 g

mass of Na in 0.820 mol of Na₂SO₄ - 46 g /1 mol x 0.820 mol = 37.72 g.
mass of Na is 37.72 g

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