08:04Mass Percent of a Solution Made Easy: How to Calculate Mass % or Make a Specific Concentrationketzbook774views1rank
03:27How To calculate Percentage Mass | Chemical Calculations | Chemistry | FuseSchoolFuseSchool - Global Education674views
Multiple ChoiceDetermine the percent composition of nitrogen and oxygen with nitrogen dioxide, NO2.2239views19rank1comments
Multiple ChoiceA 70.0-g iron nail combines with 30.0 g of oxygen to form rust. What is the total mass of the iron nail plus the rust that forms?378views
Multiple ChoiceThe following data were collected when analyzing a compound used in dentistry as a cement to repair teeth: 50.82% Zn; 16.04% P; 33.14% O What is the empirical formula of the compound?370views
Multiple ChoiceBased on the amounts of reactants used the calculated amount of product that can form for a given reaction was 20.76 g. When the reaction was carried out in a laboratory 17.34 g of product was recovered. What is the percent yield for this reaction?364views
Open QuestionA compound whose empirical formula is XF3 consists of 65% F by mass. What is the atomic mass of X?316views
Open QuestionWhat is the mass % of carbon in dimethylsulfoxide (C2H6SO) rounded to three significant figures?289views
Open QuestionWe dissolve 2.45 g of sugar in 200.0 g water. what is the mass percent of sugar in the solution?280views
Open QuestionA 500 gram iron ore sample was determined to contain 242 grams of iron. What is the mass percent of iron in the ore?290views
Open QuestionA 69.5 g sample of the compound X3O4 contains 19.2 g of oxygen atoms. What is the molar mass of element X?260views
Open QuestionCalculate the percent composition by mass of each element in Al(OH)3. Use at least three significant figures.274views
Open QuestionAspirin is a compound with the molecular formula C9H8O4. What is its percent composition?593views
Open QuestionCalculate the mass percent composition of nitrogen in each of the following nitrogen compounds.326views
Open QuestionCalculate the experimental mass % of c and h in the unknown liquid used in the experiment.677views
Open QuestionWhat is the percent by mass of chlorine in NaCl? Use mc002-1.jpg. 35.45% 39.34% 60.66% 70.90%363views
Open QuestionWhat is the mass percentage of C in CH3CH3? Provide an answer to two decimal places.383views
Open QuestionAn oxide of iron has the formula Fe3O4. What mass percent of iron does it contain273views
Open QuestionWhat is the mass percentage of c in caffeine, C8H10N4O2? Provide an answer to two decimal places.247views
Open QuestionWhich element is in the greatest amount in what is referred to as a starter fertilizer?216views
Open QuestionA hard water sample contains 0.0085% Ca by mass (in the form of Ca2+ ions). How much water (in grams) contains 1.2 g of Ca? (1.2 g of Ca is the recommended daily allowance of calcium for adults between 19 and 24 years old.)
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