Some of the formulas could be either molecular or empirical formulas; however, some can only be molecular formulas. Which of the formulas must be molecular formulas? P₂O5 NO₂ HO C8H10N4O₂

Q: One of the Freons, CCI₂F2, is manufactured from carbon tetrachloride and hydrogen fluoride. The…

A: Given,when CCl4 reacts with HF to form CCl2F2 and HCl.mass of CCl2F2 = 117 kgmass of CCl4 = 183…

Q: How many grams of oxygen is in 9.10 x 1020 molecules of N2O5?

A: Number of molecules of N2O5 = 9.10 × 1020 molecules. Mass of oxygen = ?

Q: Lithium has two stable isotopes, 6Li and 7Li. If a sample is composed of 48.0% of the lighter…

A: Average mass of an element is defined as the atomic mass of the element calculated by multiplying…

Q: A substance contains C, H and S only. Combustion analysis of a 182.9 mg sample of this substance…

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Q: • Two new elements with symbols Z and A combine. Ź forms Z¹+ and A forms A3- and the ions combine to…

A: Chemical formula of an ionic compound can be formed by criss-crossing the valencies of ions.

Q: A patient is having an allergic reaction and takes a 50.0 mg tablet of the over‑the‑counter…

A: Given, Mass of diphenhydramine hydrochloride = 50.0mg. Moles of diphenhydramine hydrochloride can be…

Q: A 1-carat diamond is pure crystaline carbon and has a mass of 0.200 g.Which contains more carbon…

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Q: How many O-atoms are there in 0.433 g of Ca(NO2)2 (MM= 132.1 g/mol)? O 3.28 x 10-3 O 1.97 x 1021 O…

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Q: A 2.4839 g sample of a hydrate of Cu(NO3)2 was heated to drive off all of the water of hydration.…

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Q: late the mass in grams of a sample of NO2 that contains 1.000 x 1025 molecules.

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Q: Compound Y contains lead and oxygen only. 15.0 g of Y was found to contain 12.99 g lead. Find out…

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Q: Two elements, R and Q, combine to form two binary compounds A and B. In the compound A, 10.50 g of R…

A: The law of multiple proportions states that if two elements combine with each other to form more…

Q: OH- + CH3COOH ==== CH3COO- + H2O. Which of the reactants is an acid?

A: Acid is a substance which can donate H+ ions .

Q: The molecular formula for benzene is C6H6. What is its empirical formula?

A: We have to predict the empirical formula of benzene.

Q: A chemist decomposes samples of several compounds; the masses of their constituent elements are…

A: In order to calculate the empirical formula of each compound , we first need to convert the grams of…

Q: Calculate the molar mass of the elements (go to the nearest one if your answer does not exactly…

A: Given: 25 g of an element contains 2.37 x 1021 atoms 25 g of an element contains 2.89 x1021 atoms

Q: How many atoms of all kinds are contained in 42.1 grams of calcium carbide (Ca2C)? Ans: 8.25 x 10^23…

A: Given :                Mass of Ca2C = 42.1 gm                 Molar mass of Ca2C = 92 gm mol-1…

Q: For each of the following samples of ionic substances, calculate the number of moles and mass of the…

A: 4.25 g of ammonium iodide 6.31 moles of ammonium sulfide. 9.71 g of barium phosphide 7.63 moles of…

Q: How many Fe(NO3)3 formula units are there in 351.0 g Fe(NO3)3 ?

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Q: Calculate the mass percentage of carbon in a mixture that contains 244 grams of potassium carbonate…

A: Molar mass of K2CO3 = 138 g/mol Molar mass of citric acid = 192 g/mol

Q: Fill in the blanks.

A: The balanced chemical equation for this reaction is: NH3 + Br2 + H2O → NH4Br + HOBrNH3 is…

Q: chemical formula

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Q: A certain organic compound has the formula C9H11O2.  A sample of this compound weighs 85.88 grams.…

A: The formula of the given organic compound is C9H11O2.  Mass of the compound=85.88 grams. The molar…

Q: Mass analysis of a common drying agent of organic molecules reveals that it has the empirical…

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Q: One mole of water contains 6.022 × 1023 hydrogen atoms

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Q: What are the molecular and empirical chemical formulas of a compound made up of these molecules? The…

A: Molecular formula of the compound is defined as the actual number of all the atoms present in a…

Q: Fill in the name and empirical formula of each ionic compound that could be formed from the ions in…

A: The formula of ionic compounds from the ions can be determined as follows:

Q: 4.39 x 10^27 P4 O10 molecules = Atoms

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Q: Calculate the number of oxygen atoms in 25.1 g of nitrous acid. 4.80 x 1023 oxygen atoms O 6.43 x…

A: Given,  Mass of nitrous acid = 25.1 g

Q: A sample of N2O5 contains 3.75 x 10^23 oxygen atoms. How many molecules are in the sample?

A: Given that  A sample of N2O5 contains 3.75 x 10^23 oxygen atoms.  The number of molecules present in…

Q: Write the empirical formula for at least four ionic compounds that could be formed from the…

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Q: There are two gas compounds that are made out of element  A and B. This is the mass percentage of…

A: Given: Mass percentage: Compound 1: 30.43% A, 69.57% B Compound 2: 63.64% A, 36.36% B

Q: A sample of C₂ H² has 1.76 × 10²4 H atoms. How many carbon atoms does the sample contain?

A: In a molecule of C3H8, the mole ratio of carbon to hydrogen is 3:8.Number of moles of a substance…

Q: A patient is having an allergic reaction and takes a 12.5mg tablet of the over‑the‑counter…

A: The mass of the tablet is = 12.5 mg = 12.5 x 10-3 g The molecular formula of diphenhydramine…

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.