Portland cement contains some Fe2O3. Calculate the mass percent composition of iron in this compound. Small amounts of Cu2O are added to glass to give it a green color. Calculate the mass percent composition of copper in this compound. Calculate the mass percent composition of oxygen in Fe2O3.

Q: determine the composition of  the following compounds: MgCl2,SiO2,(NH4)2S?

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Q: Given the following set of data for the determination of empirical formula of magnesium oxide: -…

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Q: One of the Freons, CCI₂F2, is manufactured from carbon tetrachloride and hydrogen fluoride. The…

A: Given,when CCl4 reacts with HF to form CCl2F2 and HCl.mass of CCl2F2 = 117 kgmass of CCl4 = 183…

Q: P.S. 6. A miner was digging up some ore (rock). The ore contains 84% lead(II) sulfide by mass. How…

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Q: Calculate the mass in grams of a sample of NO2 that contains 1.000 x 10^25 molecules.

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Q: Calculate the number of W atoms present in a 27.40 g sample of 47.70% pure tungsten ore.

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Q: A sample of an iron alloy contains 90.2 g Fe, 2.15 g C, and 1.01 g Cr. Calculate the percent by mass…

A: Total mass of the alloy = mass of Fe + mass of C + mass of Cr = 90.2 + 2.15 + 1.01 = 93.36 g

Q: Aluminum nitrate + potassium bromide

A: We can expect aluminium bromide and potassium nitrate as the displacement products.

Q: Cryolite, Na3AlF6(s), an ore used in the production of aluminum, can be synthesized using aluminum…

A: Given - Weight of Al2O3= 12.6kg = 12.6 × 103 g (1kg = 1000g) Weight of NaOH=59.4kg = 59.4 × 103 g…

Q: Determine the mass percent of carbon in Fe(C2H3O2)3.

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Q: 3 FeS2   +  11 O2   →  Fe3O4   +  6 SO3 100 g of iron sulfide was reacted with excess oxygen,…

A: 3 FeS2   +  11 O2   →  Fe3O4   +  6 SO3 Atomic masses Fe=56; S=32, O=16 Molecular mass of…

Q: Cu + AgNO3 → Cu(NO3)2 + Ag, balanced or not balanced?

A: In balanced equation the number of mole of each atom or molecules at left side must be equal to…

Q: Using the density of argon= 1.54 g/L, how many argon atoms are present in a room with dimensions of…

A: To solve this problem first we calculate the volume of room and then we will calculate the mass of…

Q: An 8.00 gram sample of the hydrated salt, CoCl2 x XH2O was thermally decomposed into anhydrous…

A: Given: Mass of hydrated salt = 8.00 g. And the mass of anhydrous salt obtained = 4.370 g.

Q: Calculate the mass of scheelite (CaWO4) that contains a million (1.000*10^6) oxygen atoms

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Q: Which of the following metals is least chemically reactive?  potassium  sodium  iron  magnesium…

A: The reactivity of s block metals are very high due to presence of just either 1 or 2 electrons in…

Q: The density of solid Cr is 7.15 g/cm3. How many atoms are present per cubic centemeter of Cr?

A: Mass = Volume x density Number of moles = Mass/molar mass Number of molecules = 6.0224 x 1023 x…

Q: What is the mass percentage of oxygen in phosphorus acid (H3PO3)? O 62.2 % 42.8 % 58.5 % 82.0 % 37.8…

A: Mass percentage of any element can be calculated by: Mass percentage=Mass of element in the…

Q: How many metal atoms are present in the compound represented as Al203? O 1 O 2 O 3 O 5

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Q: Madagascar is one of the most important gem-producing countries. three tonnes of Madagascar rock…

A: In order to solve this question, we will be using basic mole concepts. Also, since you have asked…

Q: Complete the Balanced Equation Mg+Zn(NO3)2=

A: The given reaction is a single displacement reaction. Single displacement: one atom or a group of…

Q: Fill in the blanks.

A: The balanced chemical equation for this reaction is: NH3 + Br2 + H2O → NH4Br + HOBrNH3 is…

Q: An alloy contains 10.8 % titanium by mass and has a density of 13.98 g/cm3. Titanium-49 has an…

A: Number of atoms = 8,926,980,280,926,177,000,000 atoms. Avogadro’s constant = 6.023 × 1023 atoms.…

Q: Chromium metal is obtained by heating chromium(III) oxide with carbon. Calculate the mass percent of…

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Q: Mn. S,O. n H20 is the general formula of a certain hydrate. When 234.9 g of the compound of the…

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Q: 4. Determine the percent composition by mass of all elements in H,SIO3.

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Q: Determine the number of nitrate ions in 179 g Mg(NO3)2.

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Q: Calculate the mass percentage of each element in vanadium (III) acetate.

A: Given :- name of compound = vanadium (III) acetate  To calculate :- mass percentage of each element

Q: Elemental chlorine exists in nature as diatomic molecules of Cl2. Could the process you used to…

A: Chlorine is a halogen with atomic number 17. It has one unpaired electron in its outermost orbital.…

Q: A 2.25 g sample of titanium metal is burned in an oxygen atmosphere to produce 3.75 g of a titanium…

A: Given that the mass of Titanium is 2.25 g and the mass of oxide is 3.75 g of Titanium oxide. The…

Q: Write a balanced equation for the reaction of glucose (C 6H 12O 6) with oxygen (O 2) to form carbon…

A: The balanced chemical equation is the equation formed when the elements on the reactant side of the…

Q: Starting with the following equation, Fe₃O₄(s) + CO(g) → Fe(l) + CO₂(g) calculate the mass in grams…

A: The reaction taking place is given as, => Fe3O4 (s) + CO (g) → Fe (l) + CO2 (g) Given: Mass of Fe…

Q: The zinc inside the penny reacted with acetic acid (C

A: Chemical reactions are expreseed in equation form , these equations are called " chemical…

Q: Complete and balance the chemical equation. chemical equation: K+ H,0 → Name the ionic product of…

A: In the  reaction between potassium and water we get the product's as potassium hydroxide and the…

Q: Write the empirical formula for at least four ionic compounds that could be formed from the…

A: Applying basic concepts of formula formation.

Q: mass

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Q: Determine the percent composition of the metal in the AlCl3

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Q: Platinum is an expensive and rare metal used in catalytic converters. Much research has been devoted…

A: Nanoparticles are very small particles which range between 1 to 100 nm. As they are very small in…

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.