Question 21 The elements calcium and phosphorous chemically combine to form an ionic compound. What is the mass percent of calcium in the resulting ionic compound (in %)? Question 22 The density of H;Oz is 1.44 g/ml. How many L of H;O2 contain 3.07 g of H?

Q: In a sample of CaCl2 • 2H2O(s), the mass of water is ___ the mass of calcium.   Question 5…

A: From the formula the information's we are getting,If 1 mole of the CaCl2 • 2H2O is present,Moles of…

Q: 95: A 1.45-g sample of phosphorous burns in air and forms 2.57 g of a phosphorous oxide. Calculate…

A: When phosphorus burns in the air, it absorbs oxygen gas which results in the formation of oxide. The…

Q: Calculate the mass of sodium in 21.5 g of NaCIO3. O 32.9 g O 4.65 g O 0.202 g O 0.465 g

A:

Q: B. Given the following reaction: A + 3B --> 2C Calculate the number of moles of A. Molecule (8) sseu…

A:

Q: Question 3 How many Mn atoms equal a mass of 54.94 g? (Refer to the Periodic Table.) 1. A) 1 2. B)…

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Q: 121: Nicotine, a stimulant found in tobacco, has the mass percent composition: C 74.03%, H 8.70%, N…

A:

Q: Question 4 Calculate the mass (in grams) of 3-34x1024 atoms of Ag. Calculate the number of atoms of…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: What mass of methane is required to produce 1.130 kg of carbon dioxide during combustion? (Assume…

A:

Q: 4. ug fio What mass of iron could be obtained from 40.0 grams of iron (III) oxide? (Ans: 28.0 g) Fe…

A:

Q: Chemistry Vocabulary WORD WALL percent composition the percent, BY MASS, of all elements in a…

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Q: Question 3 A 7.300 g sample of aluminum combined quantitatively with elemental selenium to form a…

A: Given Amount of Aluminum combined = 7.300 g Amount of compound = 39.35 g M (Al) = 26.98 g.mol-1 M…

Q: For Practice 3.16: Determine the mass of oxygen in a 7.2 g sample of Al2(SO4)3. What is the molar…

A: Mass of sample of Al2(SO4)3 =7.2 gramWe need to calculate the mass of oxygen in 7.2 gram Al2(SO4)3…

Q: 2.00 moles of water contain ---- number of water molecules.   Question 11 options:   18.02…

A: Given,

Q: QUESTION 22 How many grams of Sodium are in 0.250 mole of Sodium? B) 5.80 g A) 23.0 g C) 11.0 g D)…

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Q: What is thé mass percentage of C in codeine, C18H21NO3? Provide an answer to two decimal places.

A: Given : We have to calculate mass percentage of carbon in codeine.

Q: Determine the mol H20/mol CaSO4 if you have the following data to two decimal places (MM H20 =18.02…

A:

Q: The molar mass is 876.16 g/mol.    If you have 5.0 mL of this oil, how many moles does it contain?…

A: Given --> Density = 0.79 g/mL  Molar mass = 876.16 g/mol  Volume = 5 ml  Density = Mass / Volume…

Q: Learning Goal: To understand what an empirical formula is and to learn the procedure for finding…

A: It is based on the concept  of percentage composition. Here we are required to find the mass of…

Q: QUESTION 28 Determine the empirical formula for a compound that is 70.79% carbon, 8.91% hydrogen,…

A:

Q: QUESTION 28 For a 8.73 g sample of ethanol (shown in the figure), what is the percent composition by…

A: Given, Chemical formula of ethanol= C2H5OH Molar mass of ethanol= 46.08 g/mol

Q: Terephthalic acid is a chemical used to make polyesters, including disposable water bottles. It has…

A: Solution : The molecular formula shows the actual number of each type of atoms present in a…

Q: In a sample of CaCl2 • 2H2O(s), the mass of water is ___ the mass of calcium.   Question 5…

A: Step 1:To determine whether the mass of water in a sample of calcium chloride dihydrate…

Q: Psoralen, a compound found in giant hogweed, contains only C, H, and O. Combustion of 1.000 g of…

A: A numerical problem based on mole concept, which is to be accomplished.

Q: Pheromones are a special type of compound secreted by the females of many insect species to attract…

A: Molecular formula of pheromone: C19H38O mass of pheromone (C19H38O) = 1.3 × 10-12 g Number of…

Q: 28) 8.42 x 1027 atoms of tin 29) 6.39 x 10¹8 atoms of sulfur 30) 5.99 x 1030 molecules of SiO₂

A:

Q: The analysis of a compound shows it contains 5.4 mol C, 7.2 mol H, and 1.8 mol N. What is the…

A: Step 1) Empirical formula: The empirical formula of a compound is defined as the ratio of the simple…

Q: How many grams are contained in one equivalent of iron (iii) ion, Fe3+? A) 167.6g B) 55.85g C)…

A: The mass of iron present in one equivalent of iron (iii) ion, Fe3+ is calculated as,

Q: Question 1 1 pts Calculate the number of moles of atoms present in 5.28 g of elemental zinc.…

A: Answer 1:We know that, Number of Moles=Molar MassMass​Given that:Mass of the zinc = 5.28 gWe know…

Q: In a sample of MgSO4 • 2H2O(s), the mass of water is ___ the mass of magnesium.   Question 4…

A: First, we need to identify the molar masses of the elements involved. The molar mass of magnesium…

Q: How many grams of calcium sulfate, CaSO4, are in 0.3 mol? Assume MCaSO4 = 136.1406 g/mol. Question 7…

A: How many grams of calcium sulfate, CaSO4 are in 0.3 mol?

Q: d. Determine the % of ammonium ions(NH4*) in ammonium phosphate, (NH4)3PO4. e. How many ammonium…

A: Given  mass of ammonium phosphate = 74.5 g

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.