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2 years ago

A solute that has been dissolved in a solvent ________.

Chemistry

1 answer:

grigory [225]2 years ago

8 0

Answer:

a solution: for example when sugar is dissolved in water it becomes a sugar solution

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A sample of propane(c3h8)has 3.84x10^24 H atoms.

deff fn [24]

Answer:

A) 14. 25 × 10²³ Carbon atoms

B) 34.72 grams

Explanation:

1 molecule of Propane has 3 atoms of Carbon and 8 atoms of Hydrogen.

The sample has 3.84 × 10²⁴ H atoms.

If 8 atoms of Hydrogrn are present in 1 molecule of propane.

3.84 × 10²⁴ H atoms are present in

$\mathfrak{ \frac{3.8 }{8} \times 10 ^{24}}$

= 4.75 × 10²³ molecules of Propane.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

No. of Carbon atoms in 1 molecule of propane = 3

=> C atoms in 4.75× 10²³ molecules of Propane = 3 × 4.75 × 10²³

= 14.25 × 10²³ 

________________________________________

Gram Molecular Mass of Propane(C3H8)

= 3 × 12 + 8 × 1

= 36 + 8

= 44 g

1 mole of propane weighs 44g and has 6.02× 10²³ molecules of Propane.

=> 6.02 × 10²³ molecules of Propane weigh = 44 g

=> 4. 75 × 10²³ molecules of Propane weigh =

$\mathsf{ \frac{44 }{6.02 \times {10}^{23} } \times 4.75 \times {10}^{23} }$

$\mathsf{ = \frac{44 }{6.02 \times \cancel{{10}^{23} }} \times 4.75 \times \cancel{ {10}^{23}} }$

$\mathsf{ = \frac{44 }{6.02 } \times 4.75 }$

= 34.72 g

8 0

2 years ago

All fossil fuels contain this element. iron hydrogen copper magnesium

Rama09 [41]

<h2>Answer : Option B) Hydrogen</h2><h3>Explanation :</h3>

All fossil fuels contains hydrocarbons in it. Amongst the given options hydrogen is the correct answer. Except that it contains carbon in it. Hydrocarbons are those class of compounds which contains hydrogen and carbon as element in it.

They are considered to be good fuels because they naturally bring out complete combustion as they contain hydrogen and carbon in its compound form.

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3 years ago

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On a weather map, which symbol on a line indicates a cold front? A. semicircle B. semicircles and triangles C. full circles D. t

Reil [10]

The symbol on a line that indicates a cold front on a map is a triangle. The point of the triangle will indicate the direction of movement of the cold front.

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3 years ago

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How many mols are in 15 of mg (0H) 2

SpyIntel [72]

The answer is 0.0171468704904. We assume you are converting between moles Mg(OH)2 and gram. This compound is also known as Magnesium Hydroxide. 1 mole is equal to 1 moles Mg(OH)2, or 58.31968 grams.

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3 years ago

Which of the following is an example of chemical energy being used?

algol13

I feel like it's C. or D. but I guess it's C.

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3 years ago