Chromium metal is obtained by heating chromium(111) oxide with carbon.Calculate the mass percentage of chromium metal in the oxide,and then use this value to calculate the quantity of chromium(111) oxide(in grams and in kilograms) required to produce 850kg of chromium metal.

Q: A student created a model for the following balanced equation as shown below. What color or pattern…

A: Given Chemical Reaction :: Na2S + 2 HCl ---> 2 NaCl + H2S

Q: 5 g of anhydrous strontium nitrate is added to a beaker and exposed to the air. After several hours…

A: The percentage of water in hydrated sample is given as : Percentage of water = ( mass of water /…

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

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Q: Write the balanced equations by predicting the products of the following reactions. Include the…

A: The balanced chemical equation for the reaction between sodium and oxygen gas is shown below. The…

Q: A robot spacecraft returned samples from the planetesimal 98765 ALEKS, located in the outer Solar…

A: Given: Determine average atomic mass and complete the measurement.The average atomic mass, also…

Q: Calculate the equilibrium constant, K , at 25.0 °C for each of the reactions. Use the thermodynamic…

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Q: * Question Completion Status: Barium oxide was synthesized form the reaction of barium and oxygen in…

A: Barium reacts with oxygen to form barium oxide. The equation for the balanced chemical reaction is…

Q: Bronze is an alloy with the following composition: Component Copper Nickel Zinc mass percentage 52.0…

A: Given  Mass percentage of Cu = 52%  Total mass of sample     = 2 gram  mass of copper              =…

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A: To find the relative atomic mass of Molybdenum let us use the equation, Where, A is the relative…

Q: A 1.740-g sample of coal contains 1.584 g C. Calculate the mass percentage of C in the coal. Mass…

A: Mass percentage of C = 91.03 %

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A: The given data contains, mass of dolomite = 7.81 g. mass of calcium = 1.70 g

Q: write the chemical formula for strontium hydroxide

A: Chemical formula-  chemical formula draw to given compound name.  example - water  chemical formula-…

Q: A mass spectrometer is an instrument that allows scientists to determinethe presence of elements in…

A: The elements are arranged as the periodic function of atomic numbers.  The elements are arranged in…

Q: A 16.60 gram sample of chromium is heated in the presence of excess sulfur. A metal sulfide is…

A: Given that : Mass of Cr = 16.60g Mass of S =(Total mass of Metal sulfide - Mass of Cr) = (39.5g -…

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: 56.7 g of H,S reacts with 30.9 g of SO, according to this reaction + SO, 2H,S + So, = 35 + 2H,0 What…

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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: Write the following equations for Al2(SO4)3(aq) and Pb(NO3)2(aq). Include the states of matter in…

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

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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

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A: We have been provided with data from mass-spectroscopic analysis, including the masses of ruthenium…

Q: Predict the products of the reaction below. That is, complete the right-hand side of the chemical…

A: We have been given an inorganic reaction and we have been asked the products.of given reaction.…

Q: Predict the products of the reaction below. That is, complete the right-hand side of the chemical…

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Q: What is the significance of 'atom economy'? How is this value calculated for a chemical reaction?

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Q: What is the total number of oxygen atoms on the left-hand side of this chemical equation? 2 Ca,…

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Q: Given the following reaction in the picture, what mass of hydrogen gas will be produced by the…

A: Given reaction: 3Fe(s) + 4H2O(g) → Fe3O4(s) + 4H2(g) We have to find the mass of hydrogen gas that…

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Q: If a particular ore contains 55.0 %% calcium phosphate, what minimum mass of the ore must be…

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Q: percentage of ammonia i

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Q: Express your answer as a chemical formula. View Available Hint(s)

A: To solve this problem, we have to write the molecular formula of a given 3D-model of a compound.

Q: Lic

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Q: Enter your answer in the provided box. Alum [KAl(SO4)2 xH₂O] is used in food preparation, dye…

A:

Q: Give two differences in chemical property between carbon or its compounds and the rest of the group…

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Q: A 2.540 g sample of an oxide of tin was heated in the air until the mass of the sample no longer…

A: Mass of tin (IV) oxide is 2.842 gmolar mass of tin (IV) oxide = 150.71 g/molatomic mass of tin =…

Q: In the reaction Al(s) + Ca(NO3), (aq) → Al(NO₂), (aq) + Ca(s) which element loses electrons in the…

A: In the given reaction:Al(s) + Ca(NO3)2 (aq) → Al(NO3)3 (aq) + Ca(s)

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: what is the mass percentage of water in Zn(NO3)2*6H2O?

A: Mass percentage of water = Mass of waterMass of Zn(NO3)2.6H2Ox100There are total six water molecule…

Q: Write the equation for the reaction: when nitrogen gas (N2) reacts with sodium metal (Na), solid…

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Q: What is the molar mass of the sodium alum salt, KAl(SO4)2 •12H2O?

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Q: Three samples (A, B, and C) of pure substance composed ofsodium, sulfur, and oxygen were isolated…

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Q: a) Please calculate the theoretical lead mass can be obtained from 10 t lead concentrate containing…

A: To calculate the theoretical lead mass in 10 t lead concentrate  To calculate the theoretical…

Q: If 5.467g of KAi(OH)4 was the limiting reagent in the synthesis of Alum, what would the mass of Alum…

A: Given, Mass of KAl(OH)4 = 5.467 g Yield of the reaction =98% = 0.98 To find: Mass of alum

Q: 7. Balance the following equations: a) For the synthesis of urea, a common fertilizer CO2(g) +…

A: Balancing of reactions

Q: 2. Write the symbol for each element · aluminium sulfate · kidney stones • component of teeth and…

A: The formulas of above components- Aluminum sulfate-Al2(SO4)3 Kidney stone-cacium oxalate stones are…

Q: What is the chemical formula for sodium perchlorate?

A: The chemical formula - It is the representation of the chemical composition  of the compound

Q: What is the formula of the compound formed in the reaction of the basic oxide,magnesium oxide,with…

A: formula of magnesium oxide = MgO formula of water = H2O

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.