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Chemistry

GCSE

What is the difference between and Alkane and an Alkene

Both are molecules which contain only Carbon and Hydrogen moleculesAlkanes do not contain any carbon - carbon double bonds - all bonds are single - therefore the molecules is known as saturated the empiri...

Answered by Jess O. • Chemistry tutor

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Using the % yield calculation (please state), what is the percentage yield for the reaction of calcium oxide with water to produce calcium hydroxide if the theoretical yield is 4.0g but only 1.5g is produced?

The equation for percentage yield is as follows:% yield = ([Actual mass of product obtained]/[Maximum theoretical mass]) x 100Therefore using this equation, we can obtain the

Answered by Adam T. • Chemistry tutor

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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) = 32M...

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)

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...

Answered by Yasmin B. • Chemistry tutor

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