Introducing chemical reactions

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Question 34
Easy

Look at the diagram. It shows the displayed formula of ethane-1,2-diol.

Displayed formula of ethane-1,2-diol. On the left, a hydrogen is single-bonded to an oxygen, which is single-bonded to a carbon. This carbon has one hydrogen single-bonded above it and one hydrogen single-bonded below it. This carbon is single-bonded to a second carbon to its right. The second carbon has one hydrogen single-bonded above it and one hydrogen single-bonded below it. This second carbon is also single-bonded to an oxygen to its right, which is single-bonded to a hydrogen.

a.

Complete the table to show the number of atoms of each element in this displayed formula.

ElementNumber of atoms
C........................
H........................
O........................
[3]
b.

What is the empirical formula of ethane-1,2-diol?

[2]
c.

Ethane-1,2-diol has a melting point of −13 ∘C-13\ ^\circ\text{C}−13 ∘C and a boiling point of 197 ∘C197\ ^\circ\text{C}197 ∘C.

What is the state of ethane-1,2-diol at 25 ∘C25\ ^\circ\text{C}25 ∘C?

Explain your answer.

[3]

Introducing chemical reactions Questions

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