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What is the chemical balanced equation for the reaction between sulphuric acid and sodium carbonate? Please!there are 12 different rooms in a hotel.in how many ways can 6 guests be assigned to rooms if each guest is assigned a separate room? What is the difference between an Algebra 1A (P) Class and 2 Year Algebra 1? Some of my friends got 2 Year Algebra 1 and I got Algebra 1A? Please help with problem explanation with answer would help too? Did the original base of all animals mutate down to all the other sub-species or evolve up to all the other sub-species?