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.
- PoNon-calculator A student was carrying out a titration between an acid and an alkal. The student carried out 4 titrations to make sure that they had at least two concordant results Suggest what concordant results are. Concordont results are ones within __ cm^3 of each other. 1 mark
- When a fuel is BURNED in OXYGEN,known as a COMBUSTION reaction , this is an example of. __ an ENDOTHERMIC reaction an EXOTHERMIC reaction an ENERGY LOSS reaction a THERMAL . DECOMPOSITION reaction
- (b) The combustion of petrol in car engines produces the pollutant nitrogen monoxide. Give an equation for a reaction that removes nitrogen monoxide in a catalytic converter. __ (c) Sulfur dioxide is produced in the combustion of fossil fuels. The total emissions of sulfur dioxide in the UK have fallen dramatically since 1970. Sulfur dioxide is now removed from the flue gases in power stations by reaction with calcium oxide. CaO+SO_(2)arrow CaSO_(3) In 1970, the total UK emissions of sulfur dioxide were 6.49 million tonnes (1tonne=1000kg) Calculate the mass, in kilograms, of calcium oxide needed to react with this mass of sulfur dioxide. Give your answer in standard form.
- (ii) Potassium ions, K^+, are formed from potassium atoms. Describe how a potassium atom forms a potassium ion. (2)
- Question 66 of 100 What pH value would you expect stomach acid to have? Give your answer as a whole number. Enter your answer as a number