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: Ammonium perchlorate (NH4CIO4) is the solid rocket fuel that was used by the U.S. Space Shuttle and…

A: Amount of ammonium perchlorate= 6.3gWe have to  calculate mass of oxygen.

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.

A:

Q: There are three isotopes of Silicon. They have mass number of si^28 (27.976927) relative abundance…

A: Given-> Si^28 (27.976927) = 92.2297 % Si^29(28.976495) = 4.6832 % Si^30(29.973770) = 3.0872 %

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: Lithium has two stable isotopes, 6Li and 7Li. If a sample is composed of 48.0% of the lighter…

A: Average mass of an element is defined as the atomic mass of the element calculated by multiplying…

Q: Predict the product when the two substances mix. If the reaction occurs, write the balanced chemical…

A: A reaction is called balanced when number of atoms in reactant and product side are equal to each…

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: 7- The oxidizing agent in the following chemical reaction is +2 5Fe + MnO (aq) + 8H (aq) - Ma + 4H,0…

A: “Since you have asked multiple question, we will solve the first question for you. If you want any…

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

A:

Q: What is the mass percentage of phosphorus in a sample of 8.53 phosphorus oxychloride containing a…

A: Mass percentage of phosphorus = 20.16 %

Q: Identify an element that would have similar properties as magnesium (Mg). Explain your choice and…

A: The element that has the similar properties like magnesium is -

Q: Create a diagram to trace the development of the modern periodic table based on the observations on…

A: Hello. Since your question has multiple parts, we will solve the first question for you. If you want…

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              =…

Q: 2. The reaction between creates the product aluminum bromide. What equation includes the correct…

A: Hu

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

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

Q: What is the mass, in micro grams, of 8.9 x 10^15 atoms of cobalt?

A: The number of units present is the one mole of a substance is equal to 6.02214×1023 are termed as…

Q: The total weight of a mixture containing CaO and BaO is 0.6411 g, and the weight of anhydrous…

A: The total weight of CaO and BaO is 0.6411 g. The total weight of anhydrous sulphate salts obtained…

Q: Dolomite is a carbonate of magnesium and calcium. Analysis shows that 7.81 g of dolomite contains…

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

Q: K3PO4 + Ca(NO3)2 → Ca3(PO4)2 + KNO3 Which of the following gives the balanced equation for this…

A: The above-given reaction is : K3PO4 + Ca(NO3)2 → Ca3(PO4)2 + KNO3 We have to write the balanced…

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: Elemental phosphorus is used in the semiconductor industry. It can be obtained from an ore called…

A: The reaction above can be correctly written as below: 4Ca5(PO4)3 F + 18SiO2 + 30C ----->  3 P4 +…

Q: Calculate the mass (in g) of 2.0x10^24 atoms of Pt.

A: Given, number of atoms of Pt = 2.0 x 1024 atomsWe know, => moles of Pt = number of atoms of Pt /…

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: what is the mass of 1.08x10^22 molecules of SF6? pls, show how you got it.

A:

Q: An object is put into a graduated cylinder with 50.0 mL of water.  The two together take up a volume…

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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: A chemical reaction was used to produce 1.46 moles of copper(II) bicarbonate, Cu(HCO3)2. What mass…

A: To produce 1.4 moles of Cu(HCO3)2

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

A: In a double displacement reaction, two ionic compounds exchange their constituting ions between each…

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: A sample of a “suboxide” of cesium gives up 1.6907% of its mass as gaseous oxygen when gently…

A:

Q: How many atoms of O are found in 1.00 x 10 2 g of K 2Cr 2O 7 ?

A: Number of atoms of Oxygen present in the given compound can be calculated as -

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

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Q: How do I calculate the theoretical mass percent of barium in a sample of BaCl2*2H2O?

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

A: The question is based on the concept of chemical reactions. we need to complete the reaction…

Q: what is the final formula) - dinitrogen trisulfide - potassium sulfide - zinc acetate - lithium…

A: Dinitrogen trisulfide : N2S3Potassium sulfide : K2SZinc acetate : Zn(CH3COO-)2Lithium sulfite…

Q: A sample of solid silver oxide with a mass of 0.114 grams was reduced to elemental silver by heating…

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Q: 0.330% of the mass of a hemoglobin molecule is iron.  Calculate the number of iron (II) ions per…

A: Mass percent of hemoglobin is 0.330%. Molar mass of hemoglobin is 6.80×104 g/mol.

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

A:

Q: Calculate the mass of vanadium(V) oxide (V2O5) that contains a trillion (1.00*10^12) vanadium atoms.

A:

Q: Calculate the number of grams of lithium in 5.44 x 10^21 atoms of lithium.

A: Given -> Number of atoms of lithium =5.44 × 10^21 atoms

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

A: given  isotope        mass       relative abundance 92 mo            91.91          98% 97mo…

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.