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laila [671]
3 years ago
6

What is the best classification for this sample of crude oil?

Chemistry
2 answers:
Nata [24]3 years ago
6 0
Its have a classification of light and heavy crude oil
Makovka662 [10]3 years ago
5 0
A crude oil is a mixture of different hydrocarbons found in it. It is also commonly known as petroleum. It is made by compressing and heating organic matter for a long time period. The four main kinds of hydrocarbons located in crude oil are paraffins, naphthenes, aromatics and asphaltics.
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A 12.0% sucrose solution by mass has a density of 1.05 gem, what mass of sucrose is present in a 32.0-mL sample of this solution
natulia [17]

Answer:

Option C. 4.03 g

Explanation:

Firstly we analyse data.

12 % by mass, is a sort of concentration. It indicates that in 100 g of SOLUTION, we have 12 g of SOLUTE.

Density is the data that indicates grams of solution in volume of solution.

We need to determine, the volume of solution for the concentration

Density = mass / volume

1.05 g/mL = 100 g / volume

Volume =  100 g / 1.05 g/mL → 95.24 mL

Therefore our 12 g of solute are contained in 95.24 mL

Let's finish this by a rule of three.

95.24 mL contain 12 g of sucrose

Our sample of 32 mL may contain ( 32 . 12) / 95.24 = 4.03 g

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3 years ago
2Al(s)+Fe2O3(s) → Al2O(s)+2Fe(s) with a delta H=-847 KJ.
Scrat [10]

∆H for given reaction -847kJ

  • As it's negative reaction is exothermic

So

2 mol of Al releases 847KJ heat

4 mol Al releases

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Which statement is true for dipole-dipole forces?
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Which are characteristics of all bacteria
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It is a eukaryotic organism

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