a) Combustion analysis of 1.200 g of an unknown compound containing carbon, hydrogen , and oxygen produced 2.086 g of CO2 and 1.134 g of H2O. What is the emprical formula of the compound? b) which of the following contains the most atoms? 10.0 g Kr 10.0 g Mg 10.0 g He 10.0 g Ne 10.0 g Ar

Q: Consider the following reaction: 4 FeS + 7 O2 →  2 Fe2O3 + 4 SO2 If 2.00 mol of FeS and 2.65 mol…

A:

Q: How many phosphorus atoms are contained in 158 kg of phosphorus? 3.07 x 1027 phosphorus atoms 2.95 x…

A: To determine the number of phosphorus atoms in 158 kg of phosphorus, we need to use Avogadro's…

Q: Consider the following hypothetical equation.  A2B3 +  3 C2D --> A2D3 + 3 C2B OR A2 B3 + 3 C2 D…

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Q: Complete the table. Element Mass Moles Number of Atoms Pt 0.0449 Fe 1.14 x 1025 Ti 23.8 mg Hg 2.05

A: Pt : Mass of Pt = moles x molar mass = 0.0449 x 195 = 8.76 g Number of atoms of Pt = moles x…

Q: How many grams of tin are present if there are 6.022 x 10^23 atoms present in a sample

A: Applying mole concept. Mole= w/M

Q: Complete the table. Element Moles Mass Cr 0.00442 Fe 73.5 mg Ti 1.009 x 10-3 Hg 1.78 kg

A: Mole is represented by the symbol mol. It is unit of measurement of substance. Mass is defined as…

Q: An unknown compound is processed using elemental analysis and found to contain 117.4 g of platinum,…

A: We know that,  Number of mole = given mass/molar mass Atomic mass of platinum =195.084 g

Q: How many grams of rhenium are in a 88.24-gram sample of ReCl 3? The molar mass of ReCl 3 is 292.57…

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Q: 3.11  mL of seawater contains about 1.31×10-14  moles of gold, how many atoms of gold are in that…

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Q: Write the molecular formula of X? .

A: This is a emperical formula and molecular formula determination type  problem. Details calculation…

Q: Compound X has a molar mass of 153.03 g-mol element carbon mass % 47.09% hydrogen 6.59% chlorine…

A: Here given, Molar mass of X = 153.03 g.mol-1 Mass percentage of carbon = 47.09% Mass percentage of…

Q: What is the empirical formula of a compound with the following mass percentages of carbon, hydrogen…

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Q: What is the mass of the compound C8H18 (Mm = 114.26 g.mol-1) that contains 7.20x1022 hydrogen atoms?

A: Given :- molar mass of C8H18 = 114.26 g.mol-1  Number of H atoms = 7.20 × 1022 atoms   To calculate…

Q: How many atoms are in each elemental sample? Express your answer using two significant figures. 1)…

A: One mole of a substance is the amount of the substance that is equivalent to the molar mass of the…

Q: A 12.3 g sample of a compound known to consist of only carbon and hydrogen was found to be 14.40 %…

A: Mass of sample = 12.3 g Hydrogen percent by mass = 14.40 % Mass % = Mass of solutemass of…

Q: How many Ne atoms are contained in 32.0 g of the element? 1.07 x 10-21 atoms 3.88 x 1026 atoms O…

A: The question is based on mole concept.we need to calculate number of atoms present in given quantity…

Q: Determine the number of moles of cesium in 50.0 g of cesium.

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Q: Complete the table. Element Moles Number of Atoms Cr 9.61 × 1023 Fe 1.52 x 10-5 Ti 0.0365 Hg 1.09 ×…

A: We know that , 1 mole = 6.022 × 1023 atoms                              .....(1)…

Q: A thyroid condition called goiter can be treated by increasing iodine in the diet. Iodized salt…

A: The topic of the question relates to the use of iodine in the treatment of goiter, a condition…

Q: Compound X has a molar mass of 153.05 g mol -1 and the following composition: element mass % carbon…

A: The answer is given as follows  Emperical formula is C3H5cl Molecular formula is C6H10cl2

Q: What is the molecular formula of a substance that contains 2.64 g of C, 0.444 g of H, and 3.52 g of…

A: Given : Molecular mass of compound = 60.05 g/mol Mass of C = 2.64 g Mass of H = 0.444 g Mass of O =…

Q: How many atoms of C are present in 52 grams of sugar C6H12O6?

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Q: A 0.4842-g sample of a compound known to contain only carbon, hydrogen, and oxygen was burned in…

A: mass of sample = 0.4842 gmass of CO2 = 0.8635 gmass of H2O = 0.3533 gmolar mass of CO2 = 44.01…

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: Determine the mass (in grams) of neon that contains: a) 3.44 moles of Ne _____g Ne b) 5.13…

A: Avogadro's  number gives the number of atoms, molecules or ions in one mole of the substance and it…

Q: Complete the percent composition for the atoms in Na₂O. All answers are numbers. Use no units. Atom…

A: The compound given is Na2O Element molar mass of sodium = 23.0 g/mol  Element molar mass of oxygen=…

Q: A 5.31 g sample of compound that contains only hydrogen and sulfur was combusted, and yielded 10.0 g…

A: Moles of hydrogen and sulfur from 10.0g of SO2 and 2.81g of H2O can be calculated as

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: 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: A 10.68 g sample of compound that contains only carbon, hydrogen, and oxygen was analyzed through…

A:

Q: How many atoms of nitrogen are in 56.3g N2O4? molar mass of N2O4 is 92.0g/mol

A: This question is based on mole concept. 1mole = 6.022 * 1023 particle = Molar mass = 22.4L

Q: Combustion analysis of 1.200 g of an unknown compound containing carbon, hydrogen, and oxygen…

A:

Q: A sample of oxygen has a mass of 25.2 grams. How many O atoms are there in the sample?  atoms How…

A: Calculation given as follows

Q: Be sure to answer all parts. The interhalogen compound CIF3 reacts with NH3 to produce three…

A: Molar mass of HF = 20.01 g/mol  Molar mass of N2= 14.01 g/mol  Molar mass of Cl2 = 70.9 g/mol

Q: Which contains the greatest number of moles of oxygen atoms: 1 mol of ethanol (C2H5OH), 1 mol of…

A: Given : Moles of ethanol i.e C2H5OH = 1 mol. Moles of formic acid i.e HCO2H = 1 mol. And moles of…

Q: A compound known to contain only the elements carbon and oxygen was analyzed and found to contain…

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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.