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A student reacts 50.0cm^3 of 2.00mol dm^-3 HCl with 25.0cm^3 NaOH. What is the concentration of NaOH?

n(HCl) = 0.05 dm^3 x 2 mol dm^-3 = 0.1 mol Ratio HCl : NaOH = 1 : 1 = 0.1 mol : 0.1 mol c(NaOH) = 0.1 mol / 0.025 dm^3 = 0.4 mol dm^-3
SW
Answered by Sam W. • Chemistry tutor
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Explain why cyclohexene will react with bromine gas but benzene will not

Cyclohexene contains a double bond, which has a greater electron density than the system of pi-bonds present in a benzene molecule. This means that a dipole can be induced in the bromine molecule due to the ...
SR
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Draw the synthesis reactions, with relevant conditions and reagents, for the synthesis of ethanamine from ethane.

1st step; Free Radical Subsitituition Start using Ethane UV light Chlorine/Bromine/Flourine used To prevent further subsitituiton, add and excess of Ethane. 2nd step; Nucleophilic Substutition Reacting with ...
HO
Answered by Habibat O. • Chemistry tutor
2844 Views

A compound is found to contain 30.7% Sulfur, 23,3% Magnesium and 46% Oxygen. What is the empirical formula of the compound?

Change % of elements in to moles: 30.7 mol of S, 23.3 mol of Mg and 46 mol of O 2 . Find the mass of each of the elements: 30.7 mol / 32.06 g/mol = 0.96 g of S; 23.3 mol / 24.31 g/mol = 0.96 g of Mg; 46 mol ...
HK
Answered by Henry K. • Chemistry tutor
20777 Views

Complete the equation: Zn(s) + H2SO4 (aq) –> ...... + ......

Zn(s) + H 2 SO 4 (aq) –> ZnSO 4 (aq) + H 2 (g) Zinc reacts with sulfuric acid to form zinc sulphate and hydrogen gas
HK
Answered by Henry K. • Chemistry tutor
7163 Views