Chemistry Homework Assistance
QuestionAI's chemistry problem solver is a middle school chemistry tutoring tool that summarises key chemical reactions and equations in real-time, featuring a robust learning system to empower even those with a weak foundation in chemistry.
You needn't fret over the elemental properties of the periodic table anymore. Here, you can effortlessly access chemical reactions and reaction principles corresponding to each element. Deductive reasoning from microscopic phenomena to discern the original structure of molecules and atoms is a research technique we staunchly champion.
- 2. The diagram shows an experiment in which a model cell was placed in a sucrose solution. At the start of the experiment the model cell weighed 25 mathrm(~g) and at the end it weighed 30 mathrm(~g) . What was the percentage increase in mass? A 5-0 x B 16-7 x C 20-0 x D 83-3 x A B C D
- CRUDE OIL is a (1) resource found in rocks. It contains a mixture of compounc Is, mainly (2). 1: renewable; 2 : plastics 1: finite; 2:plastics __ 1: finite; 2 : hydrocarbons 1: renewable; 2 : hydrocarbons
- (c) Electrolysis of hydrochloric acid can produce hydrogen and chlorine. The apparatus for the electrolysis is hydrochloric acid two carbon rods a suitable container for the electrolysis reaction a suitable source of electricity test tubes Describe how the apparatus can be used to electrolyse hydrochloric acid and how the gases produced can be tested to show that they are hydrogen and chlorine. You may use a diagram to help your answer.
- (1) Calculator A carbon atom has a relative atomic mass of 13.2 60% of the carbon atom has a mass number of 12.8, whilst the remaining 40% has a mass number which is not known. Calculate the mass number of the carbon isotope which is 40% of the Corbon 132 atom. Give your answer to 2 decimal places if needed
- (c) A.student used a pipette to add 25.0cm^3 of sodium hydroxide of unknown concentration to a conical flask The student carried out a Stration to find out the volume of 0.100mol/dm^2 acid needed to neutralise the sodium hydroxide Describe how the student would complete the titration You should name a suitable indicator and give the colour change that would be seen __ (d) The student carried five titrations. Her results are shown in the table below. Concordant results are within 0.10cm^3 of each other. Use the student's concordant results to work out the mean volume of 0.100mol/ dm^3 sulfuric acid added. __ (4)