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question_answer1) Calculate the percentage of Fe in \[F{{e}_{2}}\,{{(C{{O}_{3}})}_{2}}\].
question_answer2) The molecular mass of \[{{K}_{2}}C{{O}_{3}}\] is:
question_answer3) Find the number of moles in 52 g of helium.
question_answer4) The chemical name for \[N{{a}_{2}}{{S}_{2}}{{O}_{3}}\] is:
question_answer5) The molecular formula of calcium bicarbonate is:
question_answer6) Find the number of moles in \[12.026\times {{10}^{23}}\] atoms of He.
question_answer7) Which one of the following is a tetratomic molecules?
question_answer8) Which one of the following is the empirical formula for glucose?
question_answer9) Which one of the following is the molecular formula for zinc phosphate?
question_answer10) The common name for common table salt is:
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