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4 years ago

Quarks are thought to be the building blocks of protons. Which was most affected by the discovery of the quark?

Chemistry

2 answers:

Bogdan [553]4 years ago

7 0

<span>C. the view that the atom cannot be broken down further than protons</span>

andreyandreev [35.5K]4 years ago

7 0

Answer:

C. the view that the atom cannot be broken down further than protons

Explanation:

Atom is considered as the smallest unit of matter. An atom contains protons and neutrons in the nucleus and electrons orbiting the nucleus in fixed energy shells.

It was thought that atom cannot be broken down further than these particles until quarks were discovered. A proton contains three quarks- 2 up quarks and 1 down quark.

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Why the two isotopes of bromine have the same chemical properties.

nalin [4]

Answer:

Isotopes of bromine have same chemical properties because they have same number of electrons.

Isotopes have only different number of mass that does not affect it's chemical properties too much.

3 0

3 years ago

How many grams of nitric acid HNO₃, are required to neutralize (completely react with) 4.30 grams of Ca(OH)2 according to the ac

Brrunno [24]

Answer:

7.32g of HNO3 are required.

Explanation:

1st) From the balanced reaction we know that 2 moles of HNO3 react with 1 mole of Ca(OH)2 to produce 2 moles of H2O and 1 mole of Ca(NO3)2.

From this, we find that the relation between HNO3 and Ca(OH)2 is that 2 moles of HNO3 react with 1 mole of Ca(OH)2.

2nd) This is the order of the relations that we have to use in the equation to calculate the grams of nitric acid:

• starting with the 4.30 grams of Ca(OH)2.

• using the molar mass of Ca(OH)2 (74g/mol).

• relation of the 2 moles of HNO3 that react with 1 mole of Ca(OH)2 .

• using the molar mass of HNO3 (63.02g/mol).

$4.30g\text{ Ca\lparen OH\rparen}_2*\frac{1\text{ mol Ca\lparen OH\rparen}_2}{74g\text{ Ca\lparen OH\rparen}_2}*\frac{2\text{ moles HNO}_3}{1\text{ mole Ca\lparen OH\rparen}_2}*\frac{63.02g\text{ HNO}_3}{1\text{ mole HNO}_3}=7.32g\text{ HNO}_3$

So, 7.32g of HNO3 are required.

4 0

2 years ago

So the relative mass of fluorine in the second compound is one-third that of sf6. what formula expresses one-third the amount of

stealth61 [152]

The formula SF_2 expresses one-third the amount of F.

The F:S ratio in the first compound is 6:1.

We want a compound with one third the amount of F, so F:S = 2:1.

The simplest formula with this ratio is SF_2.

5 0

4 years ago

If a sound wave speeds up and its frequency does not change, what happens to the wavelength?

yan [13]

Answer: No, the speed of propagation is constant in a given medium; only the wavelength changes as the frequency changes.

Explanation:

5 0

2 years ago

Colin decided to investigate soil erosion by water. He measured rates of erosion on

anygoal [31]

Answer:

i just had a test on this with 2 attempts and got it wrong on both but i do know that the answer is not...

the steepness of the models hillside

the rate of erosion on the hills

so the answer is either...

the amount of water sprayed on the hills

the type of material used to construct the model hills

but i think its the amount of water sprayed on the hills...i hope i helped a lil ;)

Explanation:

3 0

3 years ago