Oxygen makes up 46.7% by mass of the earth's crust. How many grams of oxygen are present if a sample of the earth's crust has a mass of 857 g?

Q: What is the total number of oxygen atoms on the right-hand side of this chemical equation?…

A: Interpretation: The total number of oxygen atoms on the right-hand of the given chemical equation…

Q: Calculate the mass, in grams, of 862 atoms of iron, Fe (1 mol of Fe has a mass of 55.85 g).

A: One mole if any substance have 6.022*10^23 atom/ particles/ion etc thus here knowing the no of moles…

Q: A compound is isolated from the rind of lemons that is found to be 88.14% carbon and 11.86% hydrogen…

A: We have to calculate the mass of C and H.

Q: . How many oxygen atoms are in 76.3 g N2O4? Conversion must be set-up in one step using dimensional…

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Q: How many grams of iron are created from 32 grams of Al? 2AI + 3FEO --> 3Fe + Al203 2702.4 B 48556.8…

A: Given the chemical reaction as follows,2Al+3FeO→3Fe+Al2O3amount of Al for reaction =32 gramwe are…

Q: How many molecules of glucose (C6H12O6) are present in 1.52 grams of glucose (C6H12O6)? The…

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Q: How many molecules are there in 16.3 mil of CO2?

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Q: Turquoise, CuAl 6 ( P O 4 ) 4 ( OH) 8·5 H 2 O(s), is one of the most valuable non-transparent…

A: Calculate molar mass of both hydrated and anhydrous form of the mineral and then calculate the mass…

Q: Which of the following conversion factors is correctly set up to determine the number of moles of…

A: Mole concept: The number of molecules or atoms present in the one mole of the substance is equal to…

Q: What is the percentage by mass of chlorine in the insecticide Lindane, C6H6Cl6?

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Q: What mass of iron (III) oxide is produced when 3.88 X 1025 grams of oxygen reacts with excess…

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Q: The chemical formula for feldspar is K₂Al₂Si₆O₁₆. How many moles of feldspar are in 669.9 grams?

A: Number of moles of a substance is equal to the mass of substance divided by its molar mass. Write…

Q: Methane gas (CH4) reacts with chlorine gas (Cl2) to produce liquid carbon tetrachloride (CCl4) and…

A: For the given reaction reactants are methane (CH4) and chlorine (Cl2). Therefore, types of atoms are…

Q: Question attached

A: Interpretation - To find the number of molecules present in each of the samples.   Formula used -…

Q: For many years the recovery of gold—that is, the separation of gold from other materials—involved…

A: Mass relationship :- In these problem ,the mass of one of the reactants/products is to be calculated…

Q: 1. All of the substances listed here are fertilizers that contribute nitrogen to the soil. Which of…

A: The rich in Nitrogen source will be for Ammonia (NH3) with percentage 82.35%

Q: Caffeine has the formula C8H10N4O2 . If an average cup of coffee contains approximately 125 mg of…

A: In the international system of units the mole (symbol: mol) is the quantity unit for measurement…

Q: Oxygen makes up 46.7 % by mass of the Earth's crust. How many grams of oxygen are present if a…

A: Percent by mass = (mass of given component/total mass of sample) × 100%

Q: The chemical formula for feldspar is K₂Al₂Si₆O₁₆. How many moles of feldspar are in 100.1 grams?

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Q: How many carbon atoms are there in 0.100lb of glucose (C6H12O6)?  How many grams of nitrogen are…

A: 1 mole of substance is equal to Avagadro 's number of atoms.  Avagadro's no=6.02×1023 atoms no of…

Q: The low-grade iron ore taconite, which contains Fe3O4, is concentrated and made into pellets for…

A: Given: Mass of taconite pellet = 1 ton Mass of iron = 545 lb To Calculate: percentage of the pellets…

Q: What is the mass of 1.82 mole C4H11O3 in grams

A: mass of 1.82 mole C4H11O3 in grams determined in step 2

Q: What mass of iron (III) oxide is produced

A: Number of moles = mass/molar mass  Molar mass of O2 = 31.999 g/mol  Molar mass of iron (iii) oxide =…

Q: How many grams would a 18.615 mole sample of a substance weigh if its molar mass was 399.76 grams…

A: Formula to calculate mole:- Mole = mass ÷ molar mass

Q: 5. Fructose (C,H,,O), a simple sugar, is commonly found in soft drinks, vegetables, fruit, and many…

A: Given: molecules of Fructose = 93.0*1023 molecules molar mass of C = 12.011 g/mol molar mass of H =…

Q: The fertilizer ammonium sulfate [(NH4)2SO4] is prepared by the reaction between ammonia (NH3) and…

A: It is required to calculate the kg of NH3 required to react with (NH4)2SO4, which can be done based…

Q: 3.01 x 1023 molecules of sucrose is _ _ _ _ _ _ _ _ _ _ _ _ _ moles of sucrose.  Why don’t you need…

A: Given : Number of molecules of sucrose = 3.01 X 1023 molecules.

Q: 4 KO₂ (s) + 2 CO₂(g) → 2 K₂CO₃(s) + 3 O₂(g) What is the mass in grams of oxygen gas that can be…

A: Given  Reaction  4KO2(s)  + 2CO2(g)   →  2K2CO3(s)  + 3O2(g)   Mass of CO2  = 0.355 gram Mass of…

Q: explain why the number of atoms and moles are different when the volumes are nearly identical?

A: 1. The table contains the data required to solve this problem.

Q: How many moles of ammonia, NH3, are produced from the reaction of 1.75 moles of Nitrogen and an…

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Q: The molar mass of one empirical unit of the antidepressant rolicyprine (C7H&NO) is 122.1 g/empirical…

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Q: What mass in grams of TNT can be made from 598 g C7H8?

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Q: If 345.5 L of hydrogen gas (d = 0.0899 g/L) reacts with an excess of nitrogen gas, what mass of…

A: Number of atoms, ions and molecules present on a given amount can be determined by “Mole Concept”.…

Q: What chemical property of potassium chlorate did you use to design a procedure to determine the…

A: Interpretation-  Tell that chemical property of potassium chlorate which we use to design a…

Q: Aqueous solutions of (NH4)3 PO4 and CaCl2 are mixed together and produce Ca3(PO4)2 and NH4Cl. When…

A: The reactants given are 1) (NH4)3PO4  2) CaCl2  And the products forming are 1) Ca3(PO4)2  2) NH4Cl…

Q: A 0.500 g sample of tin foil reacted with oxygen to give 0.635 g of product. (a) What is the…

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Q: The chemical formula for feldspar is K₂Al₂Si₆O₁₆. How many moles of feldspar are in 990.5 grams?

A: First, calculate the molar mass of K₂Al₂Si₆O₁₆.  Molar mass = 2×(molar mass of K) + 2×(Molar mass of…

Q: A molecular formula expresses the number of each kind of atom in a molecule. For example, the…

A: Given: Mass of compound = 6.50 g Mass of CO2 = 9.53 g. Mass of H2O = 3.90 g. Molar mass of CO2 = 44…

Q: The molar mass of ibuprofen is 206.3 g mol-1 and a standard tablet contains 0.2 g ibuprofen.  What…

A: Given that : The molar mass of ibuprofen = 206.3 g/mol The mass of ibuprofen in a tablet = 0.2 g

Q: which of the reactants is the limiting reactant?

A: Given :- mass of S = 2.18 g  mass of O2 = 3.89 g  To find out :- The limiting reactant  S + O2…

Q: Calculate the mass (in kilograms) of chlorine in 25 kg of chlorofluorocarbon (CFC). CFCl3

A: Formula-Stoichimetry :  From the formula of a molecule Stoichimetric amount of molecule will react…

Q: How many molecules are contained in a glass that holds 490 g of water? How many moles does that…

A: Given, water is contained in a glass. and amount of water is =490 gwe are asked to calculate, the…

Q: Calculate the mass, in grams, of 822 atoms of iron, Fe (1 mol of Fe has a mass of 55.85 g).

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Q: A lawn fertilizer is rated as 5.90% nitrogen, meaning 5.90 g of N in 100 g of fertilizer. The…

A: The answer is as follows.

Q: Calculate the mass (in kilograms) of chlorine in 25 kg of chlorofluorocarbon (CFC). CF3Cl

A: The given data contains, chlorine = 25 kg.

Q: What mass of carbon dioxide would you need to have 0.65 moles of CO2?

A: Given : Moles of CO2 = 0.65 mol

Q: 4. A sample of acetic acid has 4.22x1024 molecules. How many grams of hydrogen are present?

A:

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.