Caffeine, a stimulant found in coffee, contains 49.5%% CC, 5.15%% HH, 28.9%% NN, and 16.5%% OO by mass and has a molar mass of 195 g/molg/mol. Express your answers as chemical formulas separated by a comma.

Q: 1.00 mol/L of NaX (aq) contains 4.2% solute by mass, what is the atomic mass of X? What anion could…

A: Molarity = moles of solute/Volume of solution (L)Moles of solute = mass of Solute/molar mass of…

Q: A mixture weighing 6.200g is 28.0% silicon dioxide or sand, SiO2, 36.0% sodium chloride, or table…

A: We have to calculate the mass (grams) of the baking soda present in 6.200 g of mixture which has…

Q: Consider the following chemical reaction: Na2CO3(aq) + HCl(aq) -----------> NaCl(aq) + CO2(g) +…

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Q: Nicotinamide is an important vitamin for metabolism and is soluble in water. A deficiency of this…

A: Given data Composition of elements in Nicotinamide Elements % composition C 59 N 22.9 H 5…

Q: Caffeine, a stimulant in coffee and tea, a molar mass of 194.19 g/mol and a mass percentage…

A: Given,

Q: A compound containing only C, H, and O, was extracted from the bark of the sassafras tree. The…

A: Given:Mass of CO2 = 167 mg.Mass of H2O = 34.2 mg.Molar mass of CO2 = 44 g/mol.Molar mass of H2O = 18…

Q: (2)co 2) A sample of the hydrate of cobalt (II) sulfate had a mass of 3.326g. After heating, the…

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Q: A sunscreen preparation contains 2.50% by mass benzyl salicylate (2.50g benzyl salicylate/100g…

A: Given : weight of benzyl salicylate = 2.50 g in 100 g sunscreen  And one tube contains 4 ounces of…

Q: What was the percent of potassium chlorate in the mixture

A:

Q: The hydrated salt, MY3.XH2O, was heated strongly in a crucible to remove all the water molecules of…

A: From the given information , we have,         Mass of empty cruicible and cover, m1 = 28.86 g…

Q: Benzene (C6H6) is a liquid with a density of 0.874 g cm-3. It reacts with oxygen to give carbon…

A: Given: Volume of benzene reacted = 21.3 cm3 Density of benzene = 0.874 g cm-3 We have to calculate…

Q: 6. A student reported the following percentages for his unknown mixture: 25% NH4CI, 30% NaCI, and…

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Q: Suppose a student starts with 2.3865 g of a sand mixture and separates the components into 1.3012 g…

A: The objective of this question is to calculate the percentage of SiO2 in the starting mixture of…

Q: Sugars can be metabolized to lactic acid by Streptococcus mutans, a bacterium that lives in the oral…

A: Given : Mass percent of C = 40.0 % Mass percent of H = 6.71 % Mass percent of O = 53.3 % And molar…

Q: Find the percent, by weight, of each component.

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Q: Ascorbic acid, or vitamin C (C6H8O6), is an essential vitamin. It cannot be stored by the body and…

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Q: Cupric sulfate is commonly sold as the pentahydrate, CuSO4 ?5H2O, which has 5 moles of H2O for each…

A: The given problem can be solved by using the formula given below as; Molarity = moles of…

Q: The calcium ion is a dietary mineral essential to good nutrition. Calcium is necessary for the…

A:

Q: 6. A mixture weighing 6.200 grams is 28.0% silicon dioxide or sand, SiO2, 36.0% sodium chloride, or…

A: Since the mixture is having silicon dioxide, sodium chloride and baking soda only  Hence the sum of…

Q: Wine is approximately 12% ethanol (CH3CH2OH) by volume. Ethanol has a molar mass of 46.06 g/mol and…

A:

Q: The molar mass of one empirical unit of the antidepressant rolicyprine (C7H&NO) is 122.1 g/empirical…

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Q: What is the percent NaCl in the sample?

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Q: Straight-chain, saturated carboxylic acids, a class of hydrocarbons, has the general formula…

A:

Q: You have 235.5 g of Ba(OH)2   How many moles of barium hydroxide, Ba(OH)2, are present in 235.5…

A:

Q: Caffeine,a stimulant found in coffee,tea and chocolate,contains 49.48% carbon,5.15% hydrogen,28.87%…

A: Assuming we have total of 1 mole of caffeine  Hence the mass of caffeine = moles X molar mass = 1 X…

Q: Straight-chain, saturated carboxylic acids, a class of hydrocarbons, has the general formula…

A: Given that :-  saturated carboxylic acids has the general formula CnH2n+1COOH  Atomic weights:- 1) C…

Q: A person drinks 1.50 × 103 g of water, H2O, per day. How many moles is this?

A: Given,Mass of water = 1.50×103 gMolar mass of water is 18.015 g/mol

Q: Ammonia, NH3, can be synthesized by this reaction: 2 NO(g) + 5 H2 (g) ----------→ 2 NH3 (g) + 2 H2O…

A: The balanced reaction taking place is given as, => 2 NO (g) + 5 H2 (g) ---------> 2 NH3 (g) +…

Q: Benzene, C6H6, is an important solvent and intermediate chemical in many chemical reactions. It is…

A: According to the mole concept, one mole of any substance related as - (1) 1 mole of the Substance =…

Q: Menthol, the substance we can smell in mentholated cough drops, is composed of CC, HH, and OO. A…

A: Answer: Empirical formula of a compound is the representation of molecule in which atoms of each…

Q: How many moles of sucrose (table sugar, C 12H 22O 11, molar mass 342.3 g/mol) are contained in a…

A: Number of moles of sucrose is equal to the mass of sucrose divided by its molar mass. Write the…

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.