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3 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]3 years ago

7 0

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

andreyandreev [35.5K]3 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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Which of these is a chemical property of iron?

denpristay [2]

Iron becomes rusted especially in damp air but never in a dry air, this is one of the many unique characteristics of iron. Iron is also ductile and malleable. It is found in the seventh group of the periodic table. It has four different and unique crystalline forms and completely dissolves in dilute acids. The two chemical compounds that can be found or made from iron are the bivalent iron also known as ferrous and the trivalent iron or known as ferric compounds.

7 0

3 years ago

Read 2 more answers

Rank the following substances in order from most soluble in water to least soluble in water: methane, CH4; 2-butanol, C4H9OH; ma

Taya2010 [7]

Answer: The given substances are placed in order from most soluble in water to least soluble in water as follows.

$MgCl_{2}$ > $C_{4}H_{9}OH$ > $C_{3}H_{8}$ > $CH_{4}$

Explanation:

It is known that like dissolves like which means a polar compound will be soluble in a polar solvent. And, a non-polar compound will be soluble in non-polar solvent.

Ionic compounds are soluble in polar solvent like water. For example, $MgCl_{2}$ is an ionic compound and it is readily soluble in water.

2-butanol ( $C_{4}H_{9}OH$ ) is also a polar compound and it will also dissolve in water but to a lesser extent as compared to magnesium chloride.

Whereas both methane and propane are non-polar in nature. But as propane is larger in size as compared to methane so, it will be slightly more soluble in water as compared to methane.

Thus, we can conclude that the given substances are placed in order from most soluble in water to least soluble in water as follows.

$MgCl_{2}$ > $C_{4}H_{9}OH$ > $C_{3}H_{8}$ > $CH_{4}$

5 0

3 years ago

What is the final concentration when 5 ml of a 2.5M copper sulphate solution is diluted to 750 ml?

Firdavs [7]

Answer: The final concentration when 5 ml of a 2.5M copper sulphate solution is diluted to 750 ml is 0.017 M

Explanation:

According to the dilution law,

$M_1V_1=M_2V_2$

where,

$M_1$ = molarity of stock $CuSO_4$ solution = 2.5 M

$V_1$ = volume of stock $CuSO_4$ solution = 5 ml

$M_1$ = molarity of diluted $CuSO_4$ solution = ?

$V_1$ = volume of diluted $CuSO_4$ solution = 750 ml

Putting in the values we get:

$2.5\times 5=M_2\times 750$

$M_2=0.017$

Therefore the final concentration when 5 ml of a 2.5M copper sulphate solution is diluted to 750 ml is 0.017 M

6 0

3 years ago

Match the term (Endothermic) with the correct definition

Darya [45]

Answer:

energy goes into the chemical and cool downs the surrounding area.

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2 years ago

Why is an alloy is often more useful than a pure metal

mrs_skeptik [129]

<h2>Answer:</h2>

A pure metal has specific properties. Sometimes we need that metal but with modified properties. So for the modification of properties we make alloys.

<h3>Explanation;</h3>

An alloy is a mixture of two elements, one of which is a metal.
Alloys often have properties that are different to the metals they contain.
This makes them more useful than the pure metals alone.
For example, alloys are often harder than the metal they contain.

4 0

3 years ago