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In the labratory you are given 1.5g of butyl butanoate ester C8H16O2. (i) Draw the functional group of this compound. (ii) What is the emperical formula of the compound. (iii) What is the molar mass of the compound? (iv) How many moles were you given

(i) Ester functional group RCOOR(ii) The emperical formula is the simplest whole number ratio of atoms in a compound therefore C4H8O(iii) The molar mass is C (12 x 8) = 96 H (1 x 18) = 18 O (2 x 16) = 32Mola...
HH
Answered by Helen H. • Chemistry tutor
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Metals can be extracted fromt their oxides via the process of electrolysis. Positive metal ions are attracted to the negative electrode. explains what happens at the negative electrode. (2 marks)

Metal ions gain electrons to form metal atoms.(Eg Al3+ + 3e- ----> Al)
TD
Answered by Tamsin D. • Chemistry tutor
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Describe the bonding in i)NaCl, ii) HCl, iii) Mg

Sodium chloride forms an ionic bond, between metallic sodium and non-metallic chlorine. An atom of sodium transfers an electron to an atom of chlorine, forming a positive sodium ion and a negative chlorine i...
YB
Answered by Yasmin B. • Chemistry tutor
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Complete the balanced equation for the overall reaction in a hydrogen fuel cell. _ H2 + ___ > _ H2O

Hydrogen fuel cells are really important as they can be used to power electrical cars, so it's something that a lot of scientists are looking into at the moment. We need to balance this equation, so we need ...
KB
Answered by Kyra B. • Chemistry tutor
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List the first 4 halogens as they appear in the periodic table as they appear. What does your answer suggest about their relative reactivity?

Fluorine, Chlorine, Bromine, IodineIf you write the electronic structure to start, F = 2,7, Cl = 2, 8, 7, Br = 2, 8, 8, 7, I = 2, 8, 8, 8, 7. This shows that they all have 7 outer electrons so we can tell th...
JI
Answered by Joseph I. • Chemistry tutor
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