Answer each of the following questions. Note that none of them should require difficult calculations. a. How many molecules are present in 1 mole of pentane ( C5H12)? molecules b. How many moles of fluorine atoms are present in 8 moles of C2F6? moles c. What is the approximate mass (to the nearest gram) of 3 x 1023 helium atoms?

Q: 6. Vanillin contains carbon, hydrogen and oxygen. Combustion of 30.4 mg of vanillin yielded 70.4 mg…

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Q: What is the molar mass of the following compounds.            a. Epsom Salt, the chemical formula…

A: (a) Molar mass of Epsom salt ( MgSO4 . 7H2O ) = (24 x 1) + (32 x 1) + (16 x 4 ) + (18 x 7)…

Q: A sample of NH3 contains 5.48×1022 molecules. How many moles of NH3 are in this sample?  mol How…

A: Step 1: Calculation for the number of moles of NH3: 1 mole of any substance contains Avogadro's…

Q: A model of the butanal molecule is shown in the window below. ball & stick + labels ited a. How many…

A: From the model, Butanal=> CH3>CH2CH2CHOMolecular formula of butanal is C4H8O. Mole is the SI…

Q: Example How many molecules of O, are present in 6.25 moles? (why is this a molecule and not an…

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Q: how many ions or atoms of each element are in 160.5 g of the following substances?  a) H2 _?_ x1025…

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Q: 1. How many ATOMS of carbon are present in 6.03 grams of carbon tetrafluoride ? atoms of carbon . 2.…

A: Given, (1) The mass of carbon tetrafluoride = 6.03 grams. (2) Number of molecules of Carbon…

Q: 1) How many sodium atoms are there in 0.3 moles of Na atoms? 2) A sample of carbon dioxide is made…

A: 1) given, Number of moles of Na atoms = 0.3 moles Number of sodium atoms = ?

Q: Calculate the number of moles in 2,792.4 mg of Ca(NO3). Calculate the number of molecules. Calculate…

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Q: How many moles of silver atoms are there in 1.80 x 104 atoms of silver? O 3.30 x 103 moles O 3.00 x…

A: The given data contains, number of atoms = 1.80×1020.

Q: An Organic compound contains 59.00% by mass C, 7.15% by mass H, 7.65% by mass N, and 26.20% by mass…

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Q: A sample of Water, H2O, has a mass of 55 grams. Determine the number of moles in the sample.

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Q: . A 67.0 g sample of a compound was found to contain 40.2 g of carbon, 3.00 g of hydrogen and 23.8 g…

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Q: che empirical formula for an ox

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Q: How many moles of tin, Sn are needed to give 1.39x1022 tin atoms? Starting Unit (include substance):…

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Q: a. How many molecules are present in n g of Sulphur dioxide?

A: Molecular weight of SO2 = 64 g/mol Molecular weight of any substance contains 6.023*1023 number of…

Q: 8. Which of the following has a greater mass? A. 2.0 atoms of lead B. 5.1 x 1023 mole lithium Write…

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Q: What is the molar mass of  sulfuric acid, H2SO4 You may assume H has a molar mass of 1 g/mol, S has…

A: For question 1, we have to find the molar mass of H2SO4. For question 2, we have to find the mass of…

Q: A 2.37 g sample of nitrous oxide (an anesthetic sometimes called laughing gas) contains 3.24 x 1044…

A: Given data,  Mass of nitrous oxide = 2.37 g  Contains 3.24 × 1022 N2O molecules

Q: One carrot may contain 0.75 mg of vitamin A (C20H30O). How many moles of vitamin A is this?  How…

A: We would use relation between mass ,moles , molar mass to calculate the values.

Q: Number of atoms of Carbon in 10 moles of CAH10 are:

A: Given : moles = 10 mol

Q: The formula for sulfur tetrafluoride is SF4. a. How many grams of sulfur are present in 3.28 moles…

A: (a)Moles of sulfur tetrafluoride =3.28 moles and(b)Mass of sulfur tetrafluoride =4.73 gramWe need to…

Q: The semi-precious stone turquoise is a hydrate and with the chemical formula CuAl₆(PO₄)₄(OH)₈･4 H₂O.…

A: Hello. Since your question has multiple sub-parts, we will solve the first three sub-parts for you.…

Q: 4. YOU HAVE 15 GRAMS OF NazSO4. CALCULATE THE NUMBER OF CATIONS IN THIS MASS. GIVEN: MOLAR MASS (…

A: Given compound Na2SO4 and this compound dissociates into cation and anion as  Na2SO4 ⇌2Na+ + SO4-2…

Q: a. You have 1.893x10²º molecules of chromium (III) phosphate. i There are ii. There are ii. There…

A: Given: Molecules of chromium (III) phosphate = 1.893×1029 molecules Known: Molar mass of CrPO4 =…

Q: 7. The mass of 2.27 x 10-2 mol of a molecule is 1.0g. Identify the molecule. OC₂H6 Onone of these…

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Q: An air conditioner compressor contains pure CClF3, also known as the refrigerant R-13. CClF3 has a…

A: We know that, density can be expressed as the mass per unit volume, i.e.…

Q: osmium by mass. a) If you assume 100.0 g of the compound, what is the mass in grams of osmium that…

A: Since you have posted a question with multiple sub- parts, we will solve first three sub- parts for…

Q: The number of atoms of oxygen in a 0.01800-g sample of O3(g) is equal to the number of molecules in…

A: Given in the question : Mass of O3 = 0.018 g Mass of other hydrocarbon sample CxH6 = 0.06085 g Given…

Q: Number of atoms of Carbon in 15 moles of C4H10 are: 90.33x10^23 361.32x10^23 O 6.23x10^23

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Q: Which of these are correct/ true?  A. 1 mole of He has the same amount of atoms than 1 mole of Ca B.…

A: There are some correct statements where are written with explanatios.

Q: 19 Convert 7.16E24 atoms of Ni to grams of Fe. 2 Ni+3 Fe(NO3)2 → 2 Ni(NO3)3 +3 Fe type your…

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Q: Help me please

A: Number of moles of sulphuric acid = 8.21 moles. Number of molecules of sulphuric acid = ?

Q: Phosphoric acid is a colorless, syrupy liquid used in detergents, fertilizers and carbonated…

A: Molecular formula of phosphoric acis is H3PO4.  Molecular mass is determined by the sum of atomic…

Q: How many moles of HCl are in 30.6 g HCl? Express your answer in millimoles. (atomic weights: H=1.01;…

A: • Thus, 839 millimoles of HCl are in 30.6 g HCl in correct number of significant figures.

Q: Consider the following made-up compound: D₂Z4 Determine the number of moles of D₂Z4 in 4.5 x 1023…

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Q: How many atoms are present in 123 g of sodium cyanide (cyanide = CN-)?

A: Dear student since it is a multiple type question, according to guidelines here I am solving only…

Q: A 2.37 g sample of nitrous oxide (an anesthetic sometimes called laughing gas) contains 3.24 x 1022…

A: Given that : The mass of N2O sample = 2.37 g Number of molecules of N2O = 3.24 x 1022

Q: 1.28 x 1023 molecules of C10H22 would have what number of carbon atoms? 6.

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Q: 8. How many moles of magnesium is 3.01 x 102² atoms of magnesium?

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Q: 4.61×1021 CaCa atoms Express your answer using three significant figures.    How many moles of atoms…

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Q: The number of molecules in 56 grams of water are(Take 6.022*1023=NA

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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.