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

Q: A fertilizer is advertised as containing 14.0% nitrogen(by mass). How much nitrogen is there in…

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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: A sample of the compound shown below contains 5.22 g of nitrogen. How many grams of oxygen does it…

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Q: What gravimetric factor is required to calculate the weight of sulfur trioxide, SO3 (MM = 80.064…

A: We have to tell What gravimetric factor is required to calculate the weight of sulfur trioxide

Q: This is the chemical formula for carvone (the chemical that gives spearmint its flavor): C10H14O An…

A: Carvone has folloing molecular formula C10H14O So, 10 moles Carbon contains per mol of oxygen.

Q: One mole (molecular equivalent) of gold has a mass of 196.9655 g.  One mole of anything equals 6.022…

A: Given : Mass of gold (1 mole)= 196.9655 g  Diameter of gold = 3.58 × 10-10 m Block of gold of mass =…

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: Calculate the percentage by mass of the indicated element in the following compounds: (d) platinum…

A: The mass percentage of an element in the given molecule can be determined by the molar mass of a…

Q: Calculate the mass in grams of 1.39x10^24 molecules of methanol. The chemical formula for methanol…

A: We are given 1.39×1024 molecules of ethanol are present and we have to calculate the mass in grams…

Q: ent in that c

A: Three conversion factors in order are: Convert grams of aspirin to moles of aspirin convert moles of…

Q: Part B. 4. Volume of a Drop of Water Number of drops (10) 10 Mass of flask + watchgiass + 10 drops…

A: A numerical problem based on dimensional analysis, which is to be accomplished.

Q: A sample of glucose, C6H12O6, contains 1.250 x1021 carbonatoms. (a) How many atoms of hydrogen does…

A: a).

Q: Nitrogen and oxygen form an extensive series of oxides with the general formula NxOy. What is the…

A: Given:  Empirical formula of Nitrogen oxide is NxOy.

Q: A lawn fertilizer is rated as 4.57% nitrogen, meaning 4.57 g of N in 100 g of fertilizer. The…

A: We can solve the problem as below : 1 mole of Urea, (NH 2) 2 CO has = 2 moles of nitrogen. So, we…

Q: A certain organic compound has the formula C9H11O2.  A sample of this compound weighs 85.88 grams.…

A: The formula of the given organic compound is C9H11O2.  Mass of the compound=85.88 grams. The molar…

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: A 5.17 g sample of a compound with the formula CxHyOz is combusted and yields 13.0 g CO2 and 2.29 g…

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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: 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: Ammonium nitrate (NH4NO3) is a common fertilizer. Agronomists base the effectiveness of fertilizers…

A: 1) The mass percent of nitrogen in ammonium nitrate has to be calculated.

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

A: Given that, 46.7% by mass of the crust of earth is made up of Oxygen. It implies that every 100 g 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: Molar mass is defined as: a. the mass of one mole of a substance in grams. b. the mass of one gram…

A: option a

Q: 6. Which of the following samples contains the greatest number of molecules? A. 1 g phosphorus, P4…

A:

Q: How many kilograms of AICI3 can be made from 150 kg of chlorine

A: The balance chemical equation for reaction of Al with with Cl2 gas is as follow…

Q: 5. Which statement is NOT true? a. One mole of a substance contains a fixed number of particles. b.…

A:

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 NH3 molecules comprise one mole of NH3? What is the mass in grams of one mole of NH3? What…

A: In one moles of NH3 is equal to Avagadro number of Molecules of NH3  That means,  1mol of NH3 =…

Q: What amount of oxygen, O2, (in moles) contains 1.8x1022 molecules? А. 0.0030 В. 0.030 С. 0.30 D. 3.0

A: Given that :- O2 contains 1.8 × 10²² molecules

Q: A lawn fertilizer is rated as 6.97% nitrogen, meaning 6.97 g of N in 100 g of fertilizer. The…

A: Given: Mass of nitrogen = 6.97 g Mass of fertilizer = 100 g Known: Molar mass of nitrogen = 28 g/mol…

Q: How many atoms of carbon are present in 34. 5 g caffeine, Cg H10N4O2 ? A 1.08 x 1024 B 8.57 x 1023…

A: given, the weight of caffeine = 34.5g

Q: The formula of glucose is C6 H12 O6. a. The number of molecules in 166 grams of glucose would be…

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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: How many grams of oxygen does it contain? What is the percentage by mass of nitrogen in the…

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Q: If the magnesium strip weighed 0.51 g, what would the theoretical yield (in grams) of H2 gas be?…

A: Given :- mass of Mg strip = 0.51 g  To calculate :- theoretical yield of H2 gas (in grams)

Q: Calculate the mass of nickel that could be obtained from 3.45x1025 f. units of Nickel (III) oxide.

A:

Q: Coffee has the following formula C8H13N a) What is the molar mass of Coffee? b)How many moles of…

A: Molar mass is the sum of the atomic masses of each atom present in a molecule. atomic mass of C = 12…

Q: Calculate the mass (in g) of each sample. 5.94x1020 SO3 molecules

A: Given: 5.94*1020 SO3 molecules

Q: The molecular formula of hexakis(methylthio)benzene is C12H18S6. What is the percentage (by mass) of…

A: We have to calculate the % by mass of C in hexakis(methylthio)benzene .

Q: A sample of glucose, C6H12O6, contains 1.250 * 1021 carbonatoms. (a) How many atoms of hydrogen does…

A: 1 molecule of glucose contains 6 atoms of C, 12 atoms of H and 6 atoms of O.  Molar mass of glucose…

Q: the maximum amount of SF6 that can be produced from the reaction of 32.1 g of sulfur with 114 g of…

A: Limiting Reagent : The limiting reagent is a reactant species taking part in a chemical reaction…

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: 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.