Figure 8 shows one molecule of a compound obtained from crude oil: H H H | | | H - C - C - C - H | | | H H H **Figure 8** (i) Give the names of the two elements in this molecule: (ii) What is the molecule in Figure 8? A an oxide B a chain molecule C a fullerene D a ring molecule (iii) What is the relative formula mass of the compound in Figure 8? (relative atomic masses: H = 1.0, C = 12) A 13 B 42 C 44 D 96 (b) Crude oil can be separated into different fractions. Draw one straight line from each fraction to a use of that fraction. fraction use fuel for aircraft petrol fuel for ships kerosene fuel for cars bitumen making plastic extracting iron making road surfaces (c) Hydrogen chloride gas and sulfur dioxide gas are dissolved in separate test tubes of water. Blue litmus paper is dipped into each test tube. State and explain the colour change you would observe in each test tube.

GCSE Edexcel Chemistry Unsaturated Hydrocarbons: Figure 8 shows one molecule of a

Figure 8 shows one molecule of a compound obtained from crude oil: H H H | | | H - C - C - C - H | | | H H H **Figure 8** (i) Give the names of the two elements in this molecule: (ii) What is the molecule in Figure 8? A an oxide B a chain molecule C a fullerene D a ring molecule (iii) What is the relative formula mass of the compound in Figure 8? (relative atomic masses: H = 1.0, C = 12) A 13 B 42 C 44 D 96 (b) Crude oil can be separated into different fractions - Edexcel - GCSE Chemistry - Question 5 - 2022 - Paper 1

Question 5

$Figure-8-shows-one-molecule-of-a-compound-obtained-from-crude-oil:--------H---H---H-------|---|---|---H---C---C---C---H-------|---|---|-------H---H---H--**Figure-8**--(i)-Give-the-names-of-the-two-elements-in-this-molecule:--(ii)-What-is-the-molecule-in-Figure-8?----A--an-oxide----B--a-chain-molecule----C--a-fullerene----D--a-ring-molecule--(iii)-What-is-the-relative-formula-mass-of-the-compound-in-Figure-8?-(relative-atomic-masses:-H-=-1.0,-C-=-12)----A--13----B--42----C--44----D--96--(b)-Crude-oil-can-be-separated-into-different-fractions-Edexcel-GCSE Chemistry-Question 5-2022-Paper 1.png$

Figure 8 shows one molecule of a compound obtained from crude oil: H H H | | | H - C - C - C - H | | | H H H **Figure 8**... show full transcript

Worked Solution & Example Answer:Figure 8 shows one molecule of a compound obtained from crude oil: H H H | | | H - C - C - C - H | | | H H H Figure 8 (i) Give the names of the two elements in this molecule: (ii) What is the molecule in Figure 8? A an oxide B a chain molecule C a fullerene D a ring molecule (iii) What is the relative formula mass of the compound in Figure 8? (relative atomic masses: H = 1.0, C = 12) A 13 B 42 C 44 D 96 (b) Crude oil can be separated into different fractions - Edexcel - GCSE Chemistry - Question 5 - 2022 - Paper 1

Step 1

Give the names of the two elements in this molecule:

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Answer

The two elements in the molecule are carbon and hydrogen.

Step 2

What is the molecule in Figure 8?

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Answer

B: The molecule in Figure 8 is a chain molecule, as it consists of a linear arrangement of carbon atoms.

Step 3

What is the relative formula mass of the compound in Figure 8?

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Answer

To calculate the relative formula mass, we count the number of hydrogen and carbon atoms in the molecule:

There are 8 hydrogen atoms: $8 imes 1.0 = 8$ .
There are 3 carbon atoms: $3 imes 12 = 36$ .

Adding these together gives: $8 + 36 = 44$

Therefore, the answer is C: 44.

Step 4

Draw one straight line from each fraction to a use of that fraction.

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Answer

Fuel for aircraft: Kerosene
Fuel for ships: Petrol
Fuel for cars: Bitumen
Making plastic: Fuel for cars
Extracting iron: Bitumen
Making road surfaces: Fuel for aircraft

Step 5

State and explain the colour change you would observe in each test tube.

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Answer

In the test tube with hydrogen chloride gas, the blue litmus paper will turn red, indicating an acidic solution. This is because hydrogen chloride is a strong acid.

In the test tube with sulfur dioxide gas, the blue litmus paper may also turn red, but it could remain unchanged if the concentration is low or if it does not fully dissolve in the water. Sulfur dioxide is also acidic in nature.

Give the names of the two elements in this molecule:

What is the molecule in Figure 8?

What is the relative formula mass of the compound in Figure 8?

Draw one straight line from each fraction to a use of that fraction.

State and explain the colour change you would observe in each test tube.

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