Boron consists mainly of 19.9% boron-10 and 80.1% boron-11. What is the average atomic mass (amu) of boron? 4B.

Q: How many moles of Carbon (C) will be formed, given 0.1175 moles of Silicon (Si)? * 2 CO + 1 Si –1…

A: The mole is the measurement unit for the quantity of the material in the International System of…

Q: Q/ calculate of the molar mass (Al2(OH)3 * ,Al=26.98, O=16,H=1

A: The molar mass is the weight of one sample mole. Connect the atomic masses (atomic weights) of all…

Q: Calculate the mass CARBON in 0.0299 moles of C6H12O6.

A: A pure compound is that which contains its constituent atoms in fixed ratio by mass.C6H12O6  is a…

Q: Which titanium-containing mineral, rutile (Ti O 2 ) orilmenite (FeTi O 3 ), has the larger…

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Q: When barium (Ba) reacts with sulfur (S) to form barium sulfide (BaS), each Ba atom reacts with an S…

A: Calculate the amount of S. Mass of the sulfur=Volume (density) Mass of the sulfur=1.75 cm3(2.07…

Q: Calculate the mass of 3.01 x 1025 atoms of terbium whose molar mass is 158.9 g/mol.

A: Given that, Mass of atoms=Calculate the mass of 3.01 x 1025 Molar mass of terbium= 158.9 g/mol.

Q: Question attached

A: Mass percentage It is one of the method to express the concentration of a substance The equation…

Q: 9.) If 438g of Magnesium sulfate react with an excess of sodium chloride, how much magnesium…

A: “Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: Which element comprising Ma(OH)2 has the highest percentage by mass?

A: The compound given is Mg(OH)2. Assuming 1 mole of Mg(OH)2.

Q: 1. What does the average atomic mass of an element represent? What unit is used for average atomic…

A: We will answer the first question since the exact one wasnt specified.Please resubmit a new question…

Q: What is the mass in grams of 6.022 * 1023 N atoms of mass 14.01 amu?

A: To determine the mass in grams of 6.022x1023 N atoms of mass 14.01 amu Given that: Mass of each atom…

Q: What is the molar mass of phosphorus pentachloride (PC15)? O 190.30 g/mol O 208.22 g/mol O 172.75…

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Q: Hydrates take the form: compound·nH2O. An unknown hydrate has a molar mass of 446 g/mol.  If the…

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Q: Determined the mass percentage of hydrogen in CH4 and C4H10?

A: Molar mass is defined as average mass of atoms present in the chemical formula. It is the sum of the…

Q: What is the mass of 4.63 x 1012 atoms of Fe? O 2.73 x 10-10 g O 4.29 x 10-10 g O 9.76x 10-10 g O…

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Q: What is the mass of 0.00210 moles of K2CO3?

A: Given data: Number of moles of K2CO3 = 0.0021  Formula used: Moles=Given massMolar mass

Q: Question attached

A: Number of moles of the substance is equal to the ratio of mass to the molar mass of the substance.…

Q: How do I calculate the theoretical mass percent of barium in a sample of BaCl2*2H2O?

A: Generally, the %mass is determined by dividing the species mass with total mass of sample which then…

Q: Calculate the mass, in grams, of 162 atoms of potassium, K (1 mol of K has a mass of 39.10 g).

A: Avogadro number determines the number of atoms in one mole of a substance. Its value is 6.022×1023…

Q: An experiment requires that enough C6H12O6 be used to yield 17.2g of oxygen . How much C6H12O6 must…

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Q: 2. How many moles of Pb is 9.3 x 1015 atoms of Pb?

A: Number of atom of pb = 9.3×10^15 atoms

Q: W

A: A mole can be defined as a unit for the amount of substance. Formula for number of moles:

Q: Consider 8.63 x 1021 atoms of boron.   How many moles of boron does this represent?

A: 1 mol of atom  = Avogadro's number

Q: Calculate the mass, in grams, of 422 atoms of potassium, K (1 mol of K has a mass of 39.10 g).

A: Atoms of potassium = 422 atoms  Mass of 1 mol potassium = 39.10 g Mass of 422 atoms of K = ?

Q: 1. How many moles of Pb is 9.34 x 1015 atoms of Pb?

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Q: What is the mass percent composition of S in Al,(50,,? 21.38 % O9.372 % 42.73 % )35.97 % 28.12 %

A: The compound give is Al2(SO4)3. Assuming 1 mole of the compound. Molar mass of Al2(SO4)3 = Atomic…

Q: If a sample of N2O5 produces 1.618g of O2 how many grams of NO2 are formed?

A: Decomposition of dinitrogen pentoxide, N2O5→4NO2 + O2 One molecule of N2O5 decomposes to gives 4…

Q: what is the mass of 0.075 moles of ethans, C2H4

A: Solution The mole construct could be a convenient methodology of expressing the quantity of a…

Q: If carbon has a molar mass of 12g and oxygen has a molar mass of 16g. What is the molecular mass of…

A: Consider the given information is as follows: Molar mass of carbon = 12 g Molar mass of oxygen = 16…

Q: Calculate the percentage of nitrogen, by mass, in Ca(NO3)2.

A: Assuming we have 1 mole of Ca(NO3)2. => mass of Ca(NO3)2 we have = molar mass of Ca(NO3)2 = 164 g…

Q: Explain the difference between atomic mass (amu) and molar mass (g).

A: Atomic mass unit(amu) is the mass unit of an atom.

Q: - Give the empirical formula for vitamin C (ascorbic acid), C,H%O6 .

A: What is empirical formula of Ascorbic acid ?

Q: How many moles of iron are present in 3.15 x 10 24 atoms of iron?

A: Number of atoms of iron = 3.15 × 1024 atoms.  Number of moles of iron = ?

Q: Ca₃(PO₄)₂(s) + H₂SO₄(aq) → CaSO₄(s) + H₃PO₄(aq) calculate the mass in grams of Ca₃(PO₄)₂ that will…

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Q: About how many MOLES of aluminum are present in 152.89 grams of Al2O3?

A: Moles of a compound=given mass of the compoundmolar mass of the compoundMolar mass of Al2O3 is…

Q: What mass of oxygen would be required to convert 4.00 g of sulfur into sulfur trioxide (SO3)?

A: Given, amount of sulfur =4.00 gramwe are asked to calculate the mass of oxygen would be required…

Q: What is the mass of 2.00 moles of CS2?

A: Molar mass of CS2  = 76.14 g /mol 1 mol CS2 = 76.14 g

Q: If a sample of N2O4 contains 19 g of nitrogen (N), how many moles of N2O4 are in that sample?

A: Since in 1 mole of N2O4 we will have 2 moles of N Hence moles of N2O4 = moles of N / 2  Since moles…

Q: What is the mass of 4.63 x 1012 atoms of Fe? 9.76 x 10-10 g O 1.62 x 10 10g O 1.08 x 10-10 g O 2.73…

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Q: 2. The volume of the nucleus of a carbon atom is about 9.9 x 10-39 mL. The molar mass of carbon…

A: Given: Volume of carbon nucleus atom = 9.9 × 10-39 mL. And molar mass of a carbon atom = 12.00…

Q: A metal (M) forms an oxide with the formula M₂O. If the oxide contains 3.835% O by mass, what is the…

A: Formula of metal oxide is M2O. Molar mass of oxygen is 16 g.mol-1.  Consider the molar mass of metal…

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

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Q: Calculate the number of grams of tin contain 1.2 x 1024 atoms of tin?

A: According to the mole concept - (1) One mole of the Substance = atomic/Molecular mass of Substance…

Q: A rock is 6.5% by mass fayalite (Fe2SiO4), 14.2% by mass forsterite (Mg2SiO4), and the remainder…

A: In this question given: Fe2SiO4- Fayalite has 6.5% and 14.2% by mass forsterite, remaining is 79.3%…

Q: how many grams of N are needed to combine with O to make 250 g of N2O4?

A: The number of moles of a species is calculated by expression (1), in which, n is the number of…

Q: A rock is 17.5% by mass fayalite (Fe2SiO4), 17.6% by mass forsterite (Mg2SiO4), and the remainder…

A: Answer: First of all we will calculate the mass of each element in fayalite, frosterite and silicon…

Q: What mass of (NH4)2SO4 must be mixed with 45 kg of KNO3 to produce a fertilizer that has a 17.6 mass…

A: NH42SO4 is mixed with 45 kg of KNO3We have to find mass of NH42SO4 added to obtain the final mass…

Q: 9. Explain how the atomic mass unit (amu) is defined and explain how the definition of an amu, in…

A: amu i.e atomic mass unit is the unit used to express mass .  Avogadro's number = 6.0221 × 1023

Q: What is the mass in grams of 5.91 moles of Al2O3?

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Q: 4 g of Y reacts completely with oxygen. The following equation (ii) represents the reaction. 4 g Y…

A: From now onwards, please, post the question in English only. We have to predict the mass of product…

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.