Phosphorus is obtained primarily from ores containing calcium phosphate. If a particular ore contains 57.8% calcium phosphate, what minimum mass of the ore must be processed to obtain 1.00 kg of phosphorus?

Q: A) What is the formula of magnesium melonite dihydrate?  B) What is the mass % of melon in copper…

A:

Q: A sample of an iron alloy contains 89.4 g Fe, 2.50 g C, and 1.47 g Cr. Calculate the percent by mass…

A: Given :-  Mass of Fe = 89.4 g  Mass of C = 2.50 g  Mass of Cr = 1.47 g  To calculate :-  Percent by…

Q: What is the mass of a single bromine molecule, Br 2?

A: The bromine molecule is composed of two bromine atoms that are covalently bonded to one another.

Q: A materials engineer has filed for a patent for a new alloy to be used in golf club heads. The…

A: The minimum composition of elements is as follows: Mn=25%Al=6.3%C=0.65%Cr=5.5% The maximum…

Q: A metal (M) forms an oxide with the formula M2O. If the oxide contains 16.99% O by mass, what is the…

A: The given data contains, mass of Oxygen = 16.99 g. Thus mass of M= 100-16.99 = 83.01 g.

Q: If 44.0 g of molten iron(III) oxide reacts with 35.0 g of aluminum, what is the mass of iron…

A: Iron(III) oxide reacts with aluminium to form iron and aluminium(III) oxide. The equation for the…

Q: If a particular ore contains 55.9% calcium phosphate, what minimum mass of the ore must be processed…

A: Molar mass of calcium phosphate is sum of atomic masses of all atoms present in it.

Q: If 3.5 g of element X reacts with 10.5 g of element Y to form the compound XY, what is the percent…

A: A chemical compound is a chemical entity made up of several similar molecules (or molecular…

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

A:

Q: A type of steel used for bicycle frames contain 5g of manganese in every 400 g of steel. How much…

A: Given: Mass of manganese in 400 g of steel = 5 g And total mass of steel in bicycle = 2200 g

Q: 73: A 1.912-g sample of calcium chloride is decomposed into its constituent elements and found to…

A: The percent mass composition of an element of a compound gives the concentration of an element of a…

Q: The mass ratio of sodium to fluorine in sodium fluoride ls 1.21:1. A sample of sodium fluoride…

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Q: An experiment requires that enough XeOF4 be used to yield 19.2 g of fluorine. How much XeOF4 must…

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Q: A mixture was found to contain 1.50g NH4CI, 0.80 g NaCI, and 1.20 g SiO2. What is the percentage of…

A: Given: Mass of NH4Cl = 1.50 g Mass of NaCl = 0.80 g Mass of SiO2 = 1.20 g

Q: Calculate the mass percentage of carbon in a mixture that contains 244 grams of potassium carbonate…

A: Molar mass of K2CO3 = 138 g/mol Molar mass of citric acid = 192 g/mol

Q: Coal is a leading source of energy for the world. While coal is primarily composed of carbon and…

A: Given:S(s)+O2(g)→SO2(g)

Q: Nitrogen forms more oxides than any other element. Thepercents by mass of N in three different…

A: Empirical Formula: The empirical formula of a compound is the simplest whole number ratio of each…

Q: A sugar crystal contains approximately 2.1x10^17 sucrose (C12H22O11) molecules. What is it’s mass in…

A: The molar mass of the sucrose (C12H22O11) is 342 g/mol.The number of moles of sucrose can be…

Q: Matter is neither created nor destroyed in a chemical reaction. Thus, the mass of the products of a…

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Q: An unknown compound containing tellurium and bromine is analyzed and it is determined that 28.53% of…

A: For a compound consisting of two components A and B, mass% of A abd B are related to each other as…

Q: Suppose you have a sample of sodium weighing 11.74 g. How many atoms of sodium are present in the…

A: The number of moles (n) of sodium present in the given sample is calculated from the expression (1).…

Q: Arrange the following substances in order of increasing mass percent of carbon.a. caffeine.…

A: The given substances should be arranged in increasing mass percent of carbon. The molar mass of…

Q: White phosphorus consists of a molecule made up of four phosphorus atoms. It burns in pure oxygen to…

A: The given balanced chemical equation                                               P4…

Q: A 0.933 g sample of Nickle metal is heated in the presence of nitrogne gas forming 1.081 grams of a…

A:

Q: If 1.50 moles of nitrogen gas reacts with an excess of hydrogen gas, what mass of ammonia would be…

A: Nitrogen reacts with hydrogen to form ammonia. The equation for the balanced chemical reaction is…

Q: A 5.05 g sample of quartz (SiO2) contains 2.36 g of silicon. What are the percentages of silicon and…

A: The mass of sample of quartz is 5.05 g. The mass of silicon in quartz is 2.36 g.

Q: Upon decomposition, one sample of magnesium fluoride produces 1.66 kg of magnesium and 2.58 kg of…

A: The values are given as follows:

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

A: What is empirical formula of Ascorbic acid ?

Q: Calculate the percentage of potassium, by mass,in K2PtCl6.

A: Mass percent of the solution is defined as the mass of solute divided by the mass of solution…

Q: 17. A 5.0 g sample of calcium nitrate (Ca(NO3)2, M=164) contaminated with silica (SiO2, M=60.1) is…

A:

Q: If there are 35g Oxygen in a pure sample of Silicon Dioxide (SiO3), how many grams of Silicon are…

A: Mole can be defined as a standard unit for measuring large quantities of very small entities such as…

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

A:

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: Amounts of tin may be alloyed with copper to produce bronzes of varying composition and properties.…

A: Given :  Mass of bronze = 8.9394 g  Mass of mixture of oxides = 11.2311 g

Q: Which element comprising Mg(OH)2 has the highest percentage by mass? RSK. Oxygen KRS. Hydrogen RKS.…

A: % w/w for an element in a compound = (mass of element/total mass of compound) × 100%

Q: The carat is the unit of mass used by jewelers, and it is exactly 200 mg. How many carbon atoms are…

A:

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

A:

Q: 127: An iron ore contains 38% Fe203 by mass. What is the maximum mass of iron that can be recovered…

A: 127. Given information, An iron re contains 38% Fe2O3 by mass Mass of iron ore = 10.0 kg

Q: Part B Magnesium makes up 2.10 % by mass of the Earth's crust. How many grams of magnesium are…

A: Mass percent :-  The mass of a component in grams present in 100 grams mixture of all components is…

Q: How many moles would 1.00 x 1023 molecules of methane ( CH4 ) represent? How many Sulfur atoms would…

A: According to avogadro's rule number of molecule present in 1 mole of substance is 6.022×1023, and…

Q: A metal sulfide M2S contains 14.3% of sulfur by mass. What is the identity of the metal in this…

A: mass percentage is one of the unit to express the concentration . mass percentage is calculated y…

Q: 1) _Fe + 6.882 g of iron yields how many grams of hydrogen? H;SO, >_Fe(SO4)3 +

A:

Q: A sulfide of iron is produced when 2.33 g of iron reacts with 1.926 g of sulfur. What is the…

A: Empirical formula of a compound represents the simplest whole number ratio of the moles of the…

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

A: Avogadro's number is equal to 6.0221 x 1023 number of anything is equal to 1 mole of that thing.

Q: White sand is made of silica (silicon dioxide, or SiO2), which has a density of 2.20 g/cm3. How many…

A: Given : Density of silica = 2.20 g/cm3  And diameter of grain of sand = 0.455 mm

Q: What mass of iron(III) oxide must be used to produce 64.28 g of iron? What is the maximum mass of…

A: The equation required to produce iron from iron(III)oxide is as follows, Given grams of iron is…

Q: Chromium metal is obtained by heating chromium(111) oxide with carbon.Calculate the mass percentage…

A: By the help of stoichiometric coefficient we can find the amount of unknown substance by the help of…

Q: Show your work and report your results with the corre figures. 8008. 1. Calculate the mass percent…

A: Mass percent of Ca=(mass of Ca/ total mass) x 100. Molar mass of CaSO4=1x atomic mass of calcium +…

Q: Upon decomposition, one sample of magnesium fluoride produces 1.65 kg of magnesium and 2.57 kg of…

A: The amount of magnesium produced on the decomposition of sample (I) of MgF2 is 1.65 kg. The amount…

Q: What is the mass percent of chlorine in NH4Cl?

A: First, find the total mass of NH4Cl.NH4Cl = 54g/mol

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.