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3 years ago

Based on the information provided here, crude oil is:

Chemistry

2 answers:

Vikentia [17]3 years ago

8 0

Answer: option C, a mixture

Explanation:

Crude oil is a mixture of hydrocarbons and different organic materials. It is refined into useful materials like petrol,diesel and various petrochemicals.

Vikentia [17]3 years ago

6 0

Answer:

Crude oil is a mixture of hydrocarbons

Explanation:

Crude oil is a fossil fuel composed mainly of hydrocarbons, compounds that contain carbon and hydrogen mainly in their molecular structure. Crude oil can also contain small amounts of sulfur, nitrogen and oxygen. It is formed under conditions of high pressure and heat by the transformation of organic matter.

As mentioned, oil is made up of hydrocarbons. And the number of carbon atoms and the way they are placed inside the molecules of the different compounds gives the oil different physical and chemical properties.

So, <u><em>crude oil is a mixture of hydrocarbons</em></u>.

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HELP PLEASE I dont understand this (7th Grade science)

Maksim231197 [3]

For the second one it is physical

7 0

2 years ago

Read 2 more answers

Consider the reaction Mg₂Si(s) + 4 H₂O(ℓ) → 2 Mg(OH)₂(aq) + SiH₄(g). How many grams of silane gas (SiH₄) are formed if 25.0 g of

Neko [114]

Answer:

10.60 grams of silane gas are formed.

Explanation:

From the reaction:

Mg₂Si(s) + 4H₂O(l) → 2Mg(OH)₂(aq) + SiH₄(g)

We know that the limiting reactant is Mg₂Si, so to find the mass of SiH₄ formed we need to calculate the number of moles of Mg₂Si:

$\eta_{Mg_{2}Si} = \frac{m_{Mg_{2}Si}}{M_{Mg_{2}Si}}$

Where:

m: is the mass of Mg₂Si = 25.0 g

M: is the molar mass of Mg₂Si = 76.69 g/mol

$\eta_{Mg_{2}Si} = \frac{m_{Mg_{2}Si}}{M_{Mg_{2}Si}} = \frac{25.0 g}{76.69 g/mol} = 0.33 moles$

Now, the stoichiometric relation between Mg₂Si and SiH₄ is 1:1 so:

$\eta_{Mg_{2}Si} = \eta_{SiH_{4}} = 0.33 moles$

Finally, the mass of SiH₄ is:

$m_{SiH_{4}} = \eta_{SiH_{4}}*M_{SiH_{4}} = 0.33 moles*32.12 g/mol = 10.60 g$

Therefore, 10.60 grams of silane gas are formed.

I hope it helps you!

3 0

2 years ago

How many grams of O2 are produced as 0.033 mol of water decompose

PolarNik [594]

Answer: This can be quickly solved with "traintracks"

Explanation:

You start w/ grams of water and want to find moles of oxygen gas produced.

So you want to Convert:

Grams of water -> moles of water -> moles of oxygen gas.

The two things you need to know to set up the tracks are:

1)Molar mass of water- H2O

Hydrogen - 1.008(x2)

Oxygen - 16.00

Water - 18.016

6 0

3 years ago

How many cans of dog food must Sam buy for his 3 dogs if each dog eats 2 cans per day? Sam only shops once a week.

sergey [27]

To find the answer you can set up an equation like this: 3(x)(d)
x would stand for number of cans each dog eats, while d stands for the number of days in a week. 3(2)(7)=42 Sam would have to purchase 42 cans of dog food each week.

7 0

3 years ago

Determine the percent composition of sodium in sodium carbonate

crimeas [40]

11×2=22
(11×2)+(6)+(8×3)=52
22/52=0.4230
0.4230×100=42.3%

3 0

3 years ago