An unknown compound contains only carbon, hydrogen, and oxygen ( CxHyOz ). Combustion of 5.50 g of this compound produced 8.07 g of carbon dioxide and 3.30 g of water. If 5.50 g of the unknown compound contained 0.183 mol of C and 0.367 mol of H , how many moles of oxygen, O , were in the sample?

Q: A 58.5 g sample of an unknown compound that contains only carbon, hydrogen and oxygen was analyzed…

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Q: Sorbose, C6H12O6, is used in making vitamin C. A sorbose sample contains 36.0 g of carbon atoms.…

A: Mass of carbon =36 g  Moles of carbon in sorbose=36 g ×1 mol12.01 g=2.9975 mol Moles of H atom can…

Q: If the molecular mass of an oxide of nitrogen is 108 and 4.02 g of N combine with 11.48 g of O, what…

A: Given, Given mass of nitrogen = 4.02 g Molar mass of nitrogen = 14.01 g/mol Given mass of oxygen =…

Q: A sample of monochloro pentaborane (9), B5H8Cl, has a mass of 20.7 g. What amount, in moles, does…

A: Chemical formula of monochloro pentaborane = B5H8Cl.Above compound contains B, H and Cl atom.

Q: A sample of hydrogen sulfide, H2S, had a mass of 51.00 g. Calculate the number of hydrogen sulfide…

A: Given, mass of H2S = 51.00 g number of H2S molecules = ? Note:  molar mass of H2S = 34.1 g/mol

Q: The composition of sorbic acid is 64.3% C, 7.2% H and 28.5% O. Since its molecular mass is 112 alb,…

A: Given : Mass % : C=64.3% H=7.2% O= 28.5%

Q: The fuel used in many disposable lighters is liquid butane, C4H10. How many carbon atoms are in 1.50…

A: The value is given as follows:

Q: How many grams of gold (Au; atomic mass = 197.0 g/mol) contains 2.5 x 1020 gold atoms?

A: Number of moles = mass/molar mass  Mass = moles × molar mass  Molar mass of Au = 197.0 g/mol

Q: A scientist is trying to discover information about an unknown metal in a compound. The formula for…

A: 1- First calculate the moles of compound XBr3  moles of XBr3 = ( moles of Br ) / 3  moles of XBr3 =…

Q: A sample of the male sex hormone testosterone, C19H28O2, contains 3.58×1021 atoms of hydrogen. How…

A: Given,Testosterone contains 3.58×1021 atoms of hydrogen.

Q: A compound has a molar mass of 155.5 g/mol. The empirical formula of the compound is C₂H₇. How many…

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Q: A sample of hydrogen has a mass of 40.2 grams.  How many H atoms are there in the sample?   How…

A: Given that,mass of hydrogen = 40.2 gMolar mass of hydrogen = 2.016g/molmoles of hydrogen = mass of…

Q: A 3.87g sample of nitrous oxide (an anesthetic sometimes called laughing gas) contains 5.30x1022 N2O…

A: a) 1 molecule of N2O contains 2 nitrogen atoms, Hence, 5.30 ×1022 N N2O molecules will contain…

Q: How many moles of ibuprofen contain 1.62 x 10^23 atoms of C?

A: To find the number of moles of ibuprofen that has the given number of carbon atoms.

Q: A sample of glucose, C6H12O6, contains 1.240×1021 carbon atoms. Part A: How many atoms of hydrogen…

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Q: A substance contains 3.024 g hydrogen, 30.97 g phosphorus, and 64.00 g oxygen. How many grams of…

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Q: An unknown compound contains 53.34% rhodium, 9.338% carbon, and the rest is oxygen. a) If you assume…

A: Given a compound with the composition: Rh = 53.34 % C = 9.338 % O = 100 - (53.34 + 9.338) % = 37.322…

Q: How many grams of hydrogen are there in 28.13 g of a compound that contains 19.6% H and 80.4% C?

A: The mass of the compound is = 28.13 gThe percentage of hydrogen in the compound is = 19.6 %The…

Q: If you had 21.5 moles of silicon, how many atoms would you expect to have? And If you had 5.69 x…

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Q: A 150.0 gram sample of a white powder contains 61.05 g of carbon, 7.65 g of hydrogen, and 81.30 g of…

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Q: A scientist is trying to discover information about an unknown metal in a compound. The formula for…

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Q: How many moles of C are there in a sample that contains 15.9 grams of carbon? How many grams of…

A: The objective of the question is to calculate the number of moles and mass of carbon and krypton…

Q: A scientist is trying to discover information about an unknown metal in a compound. The formula for…

A: We have to calculate molar mass of metal and it's identity.

Q: A scientist is trying to discover information about an unknown metal in a compound. The formula for…

A: Step - 1Formula for the compound = XBr3Means in 1 mol of compound 3 mol of Bromine are…

Q: For 2.577 g of a compound containing only copper and oxygen, Cu,O, a student found that it contained…

A: Answer = 0.07781 mole

Q: A scientist is trying to discover information about an unknown metal in a compound. The formula for…

A:

Q: a sample of male testosterone C19H28O2 contains 3.88*10^21 hydrogen atoms. How many atoms of carbon…

A: Given : Number of hydrogen atoms in C19H28O2 = 3.88 X 1021 atoms.

Q: The fuel used in many disposable lighters is liquid butane, C4H10.  How many carbon atoms are in…

A: The number of moles of butane is calculated as,

Q: A sample of mass 60.5 g of a compound containing only nickel, carbon and oxygen is found to contain…

A: Mass of compound= 60.5g Mass of nickel = 20.8 g  Mass of Carbon = 17 g  Mass of oxygen = 60.5 - 20.8…

Q: A compound responsible for the odor of garlic has a molecular weight of 146 g/mol. A 0.650 g sample…

A: The molecular formula represents exact number atoms present in a compound. An empirical formula…

Q: A 56.4 g sample of a compound with a molecular mass of210 u was found to be composed of 12.35 g of…

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Q: B. How many grams of Al2(SO4)3 would contain 1.236 × 1020 atoms of sulfur? Mass of Al2(SO4)3 = grams

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Q: Formaldehyde has the formula CH2O. How many molecules are there in 0.55 g of formaldehyde?

A: The molecular formula of Formaldehyde is CH2O Hence molar mass of CH2O = Atomic mass of C X 1 +…

Q: Is trying to discover information about an unknown metal in a compound. The formula for the compound…

A: Mass of XBr3 sample= 4.723 g Moles of Br = 5.313× 10 -2 mol

Q: A 30.21 g sample of a compound that contains only carbon and hydrogen was combusted and yielded…

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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.