If the molar mass of the compound is 78g/mol and the empirical formula is CH, find the molecular formula.

Q: A compound is determined to contain 66.60% carbon, 15.65% hydrogen and 17.74% oxygen. what is…

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Q: What is the difference between an empirical formula and a molecular formula?

A: The empirical and the molecular formulas are both a type of chemical formulas. An empirical formula…

Q: How many molecules are in sample? 85.26 g CCl4

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Q: A compound contains 18.7% lithium, 16.3% carbon, and 65.0% oxygen by mass. If its molecular formula…

A: Given data, %Li = 18.7% %C=16.3 % %O=65.0%  molar mass of compound= 73.8 g mol-1 Then, molecular…

Q: Consider a sample of carbon tetrafluoride that contains 1.01 × 10²⁴ atoms of fluorine. What quantity…

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Q: How many atoms of carbon are present in 9.90 g of carbon tetrachloride?

A: The number of moles of CCl4 can be calculated using the following equation: Number of moles=given…

Q: A thimble of water contains 4.0 x 1021 molecules. The number of moles of H2O is:

A: Given: Number of molecules of water = 4.0×1021 molecules   We know that,    1 mole = 6.023×1023…

Q: The compound discussed in the above question has a molar mass of around 130 g/mol. What is the…

A: Given :- molar mass of unknown compound = 130 g/mol  To identify :- molecular formula of the…

Q: References) What number of molecules (or formula units) are present in 5.12 g of each of the…

A: Given: mass=5.12 g To find: Molecules present in 5.12 g of each of the compounds

Q: A compound is found to contain 34.60 % chlorine , 46.85 % oxygen , and 18.55 % fluorine by mass. To…

A: Given: Mass percent of chlorine = 34.60 % Mass percent of oxygen = 46.85 % Mass percent of fluorine…

Q: Why do molecular, structural, and empirical formulas exist?

A: Why do molecular, structural, and empirical formulas exist?

Q: How many chlorine atoms are in 12.2 g of CCl4?

A: To solve this problem we have to first calculate the number of mole of CCl4 then we will calculate…

Q: • A compound has the following composition: 26.58% K, 35.35% Cr, and 38.07% O. Determine the…

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Q: Find the empirical formula of a compound, given that the compound is found to be 47.9% zinc and…

A: Molecular formula: In a molecular formula we describe the number of atoms of all the elements…

Q: What is the formula mass of H2SO4?

A: The formula mass of H2SO4 is to be calculated.

Q: A 57.00g sample is composed of 69.61% Barium, 6.093% Carbon, and 24.28% Oxygen. What is the…

A: Empirical Formula  of the compound is BaCO3

Q: How many grams of carbon are in 69.36 g of octane?

A: Molar mass of Octane(C8H18) is 114.23 g/mol One molecule of Octane contains 8 atoms of Carbon Molar…

Q: A compound is found to contain 25.24 % sulfur and 74.76 % fluorine by mass. What is the empirical…

A: To calculate the empirical formula of the compound that contains 25.24% sulfur and 74.76% fluorine…

Q: How many hydrogen atoms are in 82.35 g (NH4)2504? Hint: must use Avogadro's number

A: Calculate number of H atoms present in 82.35 g of (NH4)2SO4 ?

Q: A compound is composed of elements C, H, and N. A 7.875-mg sample of the unknown compound was…

A: Given:Mass of CO2 = 21.363 mg = 21.363 ×10-3 g.Mass of H2O = 6.125 mg = 6.125 ×10-3 g.Molar mass of…

Q: how many atoms are in 355 mol Na

A: using mole concept we easily determine the presence of atoms , molecule and ions in species.

Q: A 0.77-mg sample of nitrogen reacts with chlorine to form 6.61 mg of the chloride. Determine the…

A: Mass of Nitrogen reacted = 0.77 mg Mass of Chlorine reacted = 6.61-0.77 =5.84 mg Dividing each of…

Q: How many atoms are present in 2 moles of Fe ?

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Q: How many formula units are in 108.65g of aluminum sulfate?

A: Given data, mass of Al2(SO4)3 = 108.65 g  molar mass of Al2(SO4)3 = 342.15 g mol-1  no. of formula…

Q: 1 mol of ibuprofen, C13H18O2, contains how many mol of atoms?

A: The molecular formula of ibuprofen is C13H18O2  Hence from the formula we can see that 1 molecule of…

Q: A compound has a molar mass of 86 g/mol and has the percent composition (by mass) of 55.8% C, 37.2%…

A: To determine the empirical formula for compound , first we have to consider the given percentage of…

Q: Enter your answer in the provided box. The formula for rust can be represented by Fe,O3. How many…

A: Given;

Q: What is the molecular formula of a compound that is composed of 0.186 g C, 0.0390 g H and 0.108 g N…

A: Given: The mass of carbon (C) is 0.186 g The mass of hydrogen (H) is 0.0390 g The mass of nitrogen…

Q: A compound is 55.26% potassium, 14.59% phosphorus, and 30.15% oxygen. What will be the empirical…

A: Each percentage represents the number of grams of that element per 100 grams of that compound.  Now…

Q: What is the formula mass for a compound? Why is it useful?

A: The formula mass is defined as the summation of the average atomic masses of each atom that is…

Q: A chemical analysis determined that the Butyric acid molecule was made up of 54.5% C, 9.09% H, and…

A: Given: Percent mass of carbon = 54.5 % Percent mass of hydrogen = 9.09 % Percent mass of oxygen =…

Q: Calculate how many molecules there are in 16.4 g HF.

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Q: Find the empirical and molecular formula of a compound composed of 87.73% carbon and 12.97% hydrogen…

A: Given, 87.73% carbon and 12.97% hydrogen  molar mass of 82.14 g/mol

Q: The vitamin A molecule has the formula C20H30O, and a molecule of vitamin A2 has the formula…

A: Given information, Molecular formula of vitamin A is C20H30O, and the molecular formula of vitamin…

Q: Determine the empirical formula of methyl salicylate or oil of wintergreen

A: The empirical formula of methyl salicylate is C8H8O3 or we can say C6H4(OH)(CO2CH3). Methyl…

Q: how many molecules are in the sample 2.0 g H2O

A: Answer to the following question is given as -

Q: A compound is found to contain 15.12 % phosphorus, 6.841 % nitrogen, and 78.03 % bromine by mass.…

A: Answer :-  The Empirical formula of given compound = PNBr2…

Q: A compound containing carbon and hydrogen has a molar mass of 56.11g/mol and an empirical formula of…

A: Empirical Formula: Indicates the simple whole number ratio of different types of atoms present in…

Q: How many molecules are in sample? 119.78 g C4H10

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Q: How many atoms are in 0.78 mol Si?

A: Moles of silicon = 0.78  Atoms of silicon = ?

Q: A compound the formula TeCln has a formula mass of 269.41 amu. What is the value for n in the…

A: TeCln formula mass = 269.41 amu Te formula mass = 127.6 amu Cl formula mass =  35.453 amu

Q: How many chlorine atoms are in 33 molecules of phosphorus pentachloride, PCl₅?

A: Number of chlorine atoms present in 33 molecules of PCl5

Q: A sample of hydrogen sulfide, H2S, has a mass of 30.50 g. Calculate the number of hydrogen sulfide…

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Q: a.) The percentage composition of a compound with a molar mass of 180 g/mol is as follows: 40.0…

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Q: How many molecules is 8.87^12 moles of carbon tetrachloride (CCI4)

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Q: What is the empirical formula of bismuth chloride?

A: Given , Bismuth mass = 0.687 g mass of bismuth chloride 1.032 g

Q: What is the mass of 0.500 mol of carbontetrachloride CCl4

A: mass of 0.500 mol of carbontetrachloride CCl4 has determined in step 2

Q: How many carbon atoms are in a diamond (pure carbon) with a mass of 48 mg ?

A: 1 g = 1000 mg  So , 1mg = 10-3 g  Number of moles = mass/molar mass  Molar mass of C = 12.01 g/mol…

Q: A 0.82-mg sample of nitrogen reacts with chlorine to form 7.045 mg of the chloride. What is the…

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Q: if 4.04g of n combines with 11.46g of o to produce a compound with a formula mass of108.0 amu, what…

A: Given data,  Mass of N = 4.04 g  Mass of O = 11.46 g  Formula mass of the compound = 108 amu

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.