Show all steps in the answers for the following questions using significant figures in the calculations. a. Calculate the number of moles in 8.57g of pure carbon. B. Use the information above and calculate the number of atoms of carbon in the sample. C. Find the number of moles in 4.237g of NH4CL.

Q: a. How many moles of phosphorus trichloride are present in 7.95 × 1022 molecules of this compound?…

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Q: How many molecules are in 2.33 moles of Dinitrogen Trioxide? A. 1.71 x 1023 molecules Dinitrogen…

A: Given  Number of mole of N2O3 = 2.33 mole  Number of molecule = ?

Q: 1. What is the molar mass and molecular weight of KMNO4? 2. 10g of NaCl to moles. 3. 10g of NaCI to…

A: Molecular mass is the mass of one molecule and molar mass is the mass of 1 mole of molecules.  The…

Q: inside the front cover of this book to calculate the mass in grams of each of the following samples.…

A: Note : As per our guidelines we are supposed to answer only first 3 subparts of first question.

Q: A compound has an approximate molar mass of 84.00 grams/mole and an empirical formula of CH2CH2.…

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Q: A sample is found to contain 0.650 mole of a chemical substance. a. How many atoms are present if…

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Q: 18. The chemical formula for hydrogen sulfide is H,S. What is the percent composition by mass of…

A: Step 1: Solution Given,Compound = H2Smolar mass of : hydrogen(H) = 1 g/mol, Sulfur(S) = 32…

Q: Use the References to access important values if needed for this question. The formula for aluminum…

A: Dear student since you have posted multiple questions, As per BARTLEBY QnA guidelines we are allowed…

Q: A. Determine the percent composition of the following compounds: 1. Methane (CH) 2. Glucose (CH12O6)…

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

Q: 1. How many moles are present in 24.0 grams of Sb,S,? a. 1.31x10 mol b. 1.56x10 mol c. 5.94x10 mol…

A: (1) Number of moles of Sb2S5 can be determined by using the formula given below as: Moles of…

Q: a. How many molecules of dinitrogen monoxide are present in 4.63 moles of this compound?…

A: a) Given : Moles of dinitrogen monoxide i.e N2O = 4.63 mol.

Q: What mass of Fe₂O3 is produced when 16.2 L of O₂ gas react with FeS at 458 K and 5.29 atm. 4 FeS (s)…

A: Given reaction 4FeS (s) + 7 O2 (g) -------> 2Fe2O3 (s) + 4SO2 (g)  Volume of O2 (V) = 16.2 L…

Q: 2. A sample of 2 tsp of sugar (C12H22O11) weighs 9.00 g. a. Record each step needed to calculate the…

A: a. Given that: Mass of sugar = 9.00 g. Molar mass of C12H22O11 = 12×12 + 22×1 + 11×16Molar mass of…

Q: How many grams of oxygen is present in 5.764x 1022 molecul es of carbon monoxide? A. 0.15g В. 0.31g…

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Q: 3. It is found a certain sample of a compound contains 23.0g of sodium and 35.5g of chlorine. a.…

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

Q: Convert 32 grams of C₂H₅OH to moles.

A: The given mass of C2H5OH is 32 g. The molar mass of C, H, and O is 12.011 g/mol, 1.008 g/mol, and…

Q: An unknown compound comprised of osmium and chlorine is 40.11% osmium by mass. a. If you assume…

A: Hello. Since the question contains more than three sub-parts, the first three sub-parts shall be…

Q: Convert the 123 g of CaF2 to moles.

A: Given information is as follows: The mass of CaF2 = 123 g The moles of a substance can be calculated…

Q: Write the chemical formula for each compound, and then calculate the amount in moles in each sample.…

A: Given Mass of indium carbonate = 19.2 mg

Q: Write the chemical formula for each compound, and then calculate the amount in moles in each sample.…

A: Given: Mass of copper(II) sulfate pentahydrate = 78.1 kg

Q: 2. Consider the compound potassium hypochlorite. a. Write out the formula for potassium…

A: 2. We have to answer the following questions Write the formula of the potassium hypochlorite.…

Q: Calculate number of moles in these quantities. a. 01 × 1024 molecules of CO2…

A: One mol of CO2 contains 6.022×1023 molecules per mol. The number of moles of CO2 that contain 1×1024…

Q: y MOLECULES of molocules

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Q: Determine the number of moles in the given amount of each substance. Show or explain your work. a.…

A: 1 mole of any element / compound contains 6.02 * 1023 atoms / molecules  of that substance. Mass of…

Q: Draw a formula unit of calcium chloride and use that to determine the chemical formula of the 5.…

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Q: 10. What does Avogadro's number represent? a. the number of atoms in 1 mol of an element b. the…

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Q: a. Use the average atomic mass to calculate the number of moles of the element present in 6.70 g of…

A: a) given, mass of neon = 6.70 g Number of moles of neon = ? Note: Atomic mass of neon = 20.18 g/mol

Q: The formula for nitrogen dioxide is NO₂2. a. How many grams of nitrogen are present in 3.85 moles of…

A: Here, we have to calculate the mass of nitrogen that is present in 3.85 moles of NO2 and the number…

Q: Calculate the percent by mass of each element in the following compounds. a. Methane, CH4 b.…

A: Percent by mass is simply the ratio of atomic mass of element present in compound to total molar…

Q: Which of the following compounds contains the largest number of atoms?

A: 1 mol = 6.022 × 1023  atoms   We can calculate moles of each atom in a mole of compound. For example…

Q: 3. The average atomic mass of an atom is expressed in c. g/mol a. grams b. amu d. moles 4. Which…

A: Choose the correct option of the following --

Q: buprofen is an anti-inflammatory with the formula C13H18O2 A. What is the molar mass of ibuprofen?…

A: The answer can be calculated by the simple unitary method.

Q: Which substance has the largest molar mass A. Water B. Carbon dioxide C. Methane (CH_4) D. Iodine…

A: Molar mass of a compound can be calculated by adding the atomic masses of the constituent atoms.…