3 (a) Complete the sentence by putting a cross (X) in the box next to your answer - Edexcel - GCSE Chemistry - Question 3 - 2013 - Paper 1
Question 3
3 (a) Complete the sentence by putting a cross (X) in the box next to your answer.
A mixture of two immiscible liquids can be separated by using
☐ A fractional dist... show full transcript
Worked Solution & Example Answer:3 (a) Complete the sentence by putting a cross (X) in the box next to your answer - Edexcel - GCSE Chemistry - Question 3 - 2013 - Paper 1
Step 1
Complete the sentence by putting a cross (X) in the box next to your answer.
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Answer
The correct method for separating a mixture of two immiscible liquids is to use a separating funnel. This is because it allows the two liquids to separate based on their different densities.
Step 2
The electronic configuration of oxygen is 2.6.
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Answer
The dot and cross diagram for a molecule of oxygen, O₂, shows that each oxygen atom has 6 outer electrons. The diagram includes two oxygen atoms sharing a double bond, where the outer electrons are represented as dots and crosses.
One oxygen atom: ●●●●
Other oxygen atom: ××××
The bonds represented indicate the shared electrons.
