Practice Exercise 7.7 Calculate the percent composition by mass of calcium in Ca(NO3)2. % calcium

Q: Gold is a precious metal . how many atoms of gold are in a grainof gold?

A: Given,  Gold is a precious metal . how many atoms of gold are in a grain of gold = ?

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Q: What is the molecular formula of for the compound under question 3 if the molar mass is 141.94…

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Q: What is known as mole of hydrogen ?

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Q: SEP Use Mathematics Calculate the number of moles in 75.0 g of dinitrogen trioxide.

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

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Q: What is the correct "setup" for the problem "How many atoms are present in 10.4 g Ge?"

A: Given  mass of Germanium = 10.4 gram  Number of atoms     = ?

Q: Sodium sulfate is used in the manufacture of detergents.a. Identify each of the component elements…

A: a) The elements which are all present in sodium sulfate has to be given.

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Q: Use the relationship betweenAvogadro’s number and the mole toperform calculations.

A: The relationship between Avogadro’s number and the mole to perform calculations has to be given.

Q: The percent by mass of calcium in CaI2 is  ?????%.

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Q: 1 mole of Pure Alcohol (ROH) having three carbon atoms. What is its percent composition?

A: The given organic compound is Pure Alcohol. Number of moles of Pure Alcohol = 1 1 mole of given…

Q: mass

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Q: Molecular mass and mole concept.

A: Molecular mass: The average relative mass of the molecules of a substance compared to the atom of…

Q: When 2.886 grams of a hydrocarbon, CxHy, were burned in a combustion analysis apparatus, 8.842 grams…

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Q: Please explain mole concept all formula.

A: The mole concept was introduced to explain the concentration of the ions, compounds, and solutions.…

Q: mass

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Q: 89% copper oxide What is the

A: Given percentage of Copper Cu=89% Given percentage of oxygen=(100-89)=11%

Q: A compound that contains only copper and chlorine contains 2.363 g copper and 2.637 g chlorine. What…

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Q: Determine the number of moles in 5.57 × 10²³ formula units of BaBr₂.

A: in one avegadro number is equal to 6.022 × 1023 formula unit.

Q: Calculate the formula mass of calcium carbonate.

A: The sum of atomic weights of the atoms present in the empirical formula of a compound is said to be…

Q: What is the number formula units in a 9.99 mol sample of CaO

A: Relationship between number of moles and formula units is given below:

Q: salt.

A: Mass of Cupper= 88.81 Mass of Oxygen =100-88.81=11.19 Mole of Cupper =88.81÷63.5= 1.39 Mole of…

Q: Calculate the formula mass of ammonium nitrate.

A: Ammonium Nitrate is made of Cation Ammonium ion i.e. NH4+ and Anion Nitrate ion i.e. NO3- .…

Q: what is the percent composition of calcium in calcium oxide (CaO)?

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Q: round answer to three significant figures. The formula of sodium nitrate is NaNO3. determine the…

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Q: What is the percent composition for potassium and for bromine in KBr?

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Q: ignment/takeCovalentActivisy [Review Topics] [References) Use the References to access important…

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Q: A hydrate of Barium nitrate contains 73.46% salt by mass. Determine the formula of the hydrate.

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Q: The number of moles of potassium that contains 8.47×1025 atoms.

A: Given,Number of potassium atoms = 8.47 × 1025

Q: Calculate the empirical formula of the compound

A: To calculate the emperical formula we have to follow the following steps as described in step 2 of…

Q: A molecule contains only carbon and hydrogen. The percent hydrogen is 27.45 %. Determine the…

A: The emperical formula of the compound is given below

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Q: The number of molecules in 76g of fluorine

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Q: 1.2.How many moles of sodium bicarbonate are present in the 5.00 g?

A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…

Q: 17) What is the mass of CO that contains one trillion carbon atoms?

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Q: Complete the table below for calculating the formula weight of the ionic compound cobalt(III)…

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Q: Ascorbic acid (C₆H₈O₆) is also known as Vitamin C. What quantity in molecules of C₆H₈O₆ does a…

A: To find molecules of vitamin C, first convert mass in grams then divide it by molar mass to get its…

Q: Determine the number of moles in 5.31 × 10²³ formula units of BaBr₂.

A: No of formula units of BaBr2 = 5.31 × 10e23 Number of moles = ?

Q: Regular treatment with low dose aspirin is used to help prevent cardiovascular disease. How many…

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Q: How do I find the number of moles of a polyatomic ion in a compound

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Q: What is the empirical formula of a molecule containing four sulfur atoms and four fluorine atoms?

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Q: What is the molar mass if NaCl

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Q: Determine the emprical fomula for this compound with the following percentage compostion 15.8%…

A: Given:% of C = 15.8%% of S = 84.2%We need to determine the Empirical formula.

Q: Identify the empirical formula from the molecular formula:

A: using basics of empirical formula by molecular formula.

Q: Briefly explain how the atomic mass of an element is related to its molar mass.

A: How the atomic mass of an element is related to its molar mass ?

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Q: 7. A compound contains 30.4 g of nitrogen and 69.6 g of oxygen by mass. What is the chemical formula…

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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.