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0.120g of an ideal gas was introduced into a gas syringe. The volume occupied by the gas at a pressure of 1.02x10^5 Pa and temperature 20 degrees was 49.3 cm^3. Calculate the molar mass of the gas.

The ideal gas law is PV=nRT, and we know that we can achieve the molar mass through the relationship of; n=m/mr. When using the ideal gas law it is essential that we use SI units before we begin plugging in ...
RS
Answered by Robbie S. • Chemistry tutor
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How would you synthesise an carboxylic acid just from a primary haloalkane like bromoethane?

Nucleophilic substitution using NaOH to convert haloalkane to primary alcohol. This is a mechanism that you need to know for the exam. Then oxidise the alcohol by refluxing with acidified potassium dichromat...
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Answered by Ollie W. • Chemistry tutor
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What are the half equations representing the changes of Pb2+ and Br- in the electrolysis of lead bromide?

Pb2+ + 2e- -> Pb 2Br- -> Br2 + 2e- Lead ions undergo reduction (gain of electrons) at the negative electrode to form solid lead. Bromide ions undergo oxidation (loss of electrons) at the positive elect...
SF
Answered by Sophie F. • Chemistry tutor
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What observations would I expect to make if I dropped from magnesium into some hydrochloric acid? What is the balanced chemical equation?

Effervescence and the magnesium metal would dissolve. Mg + 2HCl --> MgCl2 + H2
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Answered by Ollie W. • Chemistry tutor
4045 Views

What is the difference between an acid and a base?

An acid when dissolved in a liquid, will produce hydrogen ions (H+) while a base will produce hydroxide ions (OH-). When a litmus paper is used to test acids and bases, acids turn the litmus paper red while ...
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Answered by Laudina S. • Chemistry tutor
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