Valuable minerals (chemicals) can be obtained from ores, which are natually occuring mixtures. One ore cotains 38% magnetite, a mineral with the chemical formual Fe3O4. Fe3O4 contains 72.4% iron. What mass of ore (in tons) would contain 3.5 tons of iron? (Hint: your mass percent conversion factors can have units of tons)

Q: A sample of limestone and other soil materials was heated, and the limestone decomposed to give…

A: Given -> CaCO3(s) -----> CaO(s) + CO2(g)  Weight of sample = 2.237 gm  Weight of CO2 formed =…

Q: A dictionary definition of homogeneous is “uniform in composition throughout.” River water is a…

A: A dictionary definition of homogeneous is “uniform in composition throughout.” River water is a…

Q: A particular ore of lead, galena, is 10.0% lead sulfide, PbS, and 90.0% impurities by weight. What…

A: we  need to calculate mass of Pb in the ore

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: .Pure molten iron and carbon monoxide are produced in a blast furnace by the reaction of iron(III)…

A: Given mass of iron(III) oxide = 1.58 kg

Q: Lead is found in Earth's crust as several different lead ores. Sup- pose a certain rock is 38.0% PbS…

A: Given that:                       Rock consists of:                                          Galena…

Q: Substance AB2 is 60% A by mass.  What is the percent A by mass for substance AB?  Justify your…

A: Law of definite proportions: It states that chemical compounds has formed always in a fixed ratio. 1…

Q: A sample of nickel silver contains 18.0% nickel by mass. What mass of nickel silver must be melted…

A: Given: Sample of Nickel Silver contains: 18% Nickel by mass.

Q: 1)A solution of Na2CO3 is prepared by dissolving 0.511 g of the solid in approximately 30 mL of…

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

Q: 3 AGNO, + K,PO, --> Ag.PO, + 3KNO, Describe what is happening Reactants combine into a large one…

A: Given  3AgNO3 + K3PO4 →Ag3PO4 + 3KNO3

Q: [References] A mixture of CuSO, and CUSO, 5 H,0 has a mass of 1.215 g. After heating to drive off…

A:

Q: mercury salicylate is a common active ingredient in liniments such as ben gay . it is also known as…

A: n=mM Number of moles of carbon dioxide will be: nCO2 = 12.24 g18 g/mol=0.278 mol Similarly, number…

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: The following data were obtained when a test tube containing barium chloride hydrate was weighed…

A: Mass of an empty test tube = 18.42gMass of the test tube containing hydrate (before heating) =…

Q: Example 60 mice, each weighing 2 kg, were used in a lethal dose (LD50) experiment. The number of…

A: Answer..

Q: What is thé mass percentage of C in codeine, C18H21NO3? Provide an answer to two decimal places.

A: Given : We have to calculate mass percentage of carbon in codeine.

Q: 1. As of today Silver is trading at $27.10 per ounce. Recall that 1 ounce = 28g. If we mine 2.5x106…

A:

Q: 6. A student reported the following percentages for his unknown mixture: 25% NH4CI, 30% NaCI, and…

A:

Q: You wish to prepare 211 grams of 16.6 % Mg(CH3COO),. . You will need grams of magnesium acetate and…

A:

Q: Mole is the term used to express the quantities of substances involved in a chemical reaction. Mole…

A:

Q: CoCl2 .x -H2O is the purple sample. Calulacte the value for the x integer.   Mass of sample: 1.000…

A:

Q: The typical grade of Pine Point ore is 3% for Pb, and 7% for Zn. Suppose the sample pictured in the…

A: Given , typical grade of pine point ore is 3% pb . 7%  Zn And total weight of the sample = 13.6kg…

Q: 1.Glucose is an important biological molecule with the molecular formula C₆H₁₂O₆. What is its…

A: 1.Glucose is an important biological molecule with the molecular formula is C₆H₁₂O₆. An empirical…

Q: Substance AB2 is 60% A by mass.  What is the percent A by mass for substance AB?  Justify your…

A: For given compound AB2, 60% by mass is A then obviously 40% is B. That is for 100g of given…

Q: certain alloy with a density of 11.5 g/cm3 contains 55% iron by mass. a) How many pg of iron would…

A: Density is defined as the mass per unit volume. It is represented by rho . Its relation is as…

Q: B) Find the normality of a solution that can be made by dissolving 2.8 g. of CaCl, in 250 ml of…

A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…

Q: B. TRUE OR FALSE: Read each statement carefully. Write TRUE if the statement is correct and FALSE if…

A: Percentage composition gives a brief ideas about each elemental composition as follows.

Q: Calculate the mass, in grams, of 322 atoms of iron, Fe (1 mol of Fe has a mass of 55.85 g).

A:

Q: Lead is found in Earth’s crust as several different lead ores. Suppose a certain rock is 38.0% PbS…

A:

Q: A student, Ken, is given a mixture containing two carbonate compounds. The mixture includes MgCO,…

A: Given: Percent by mass of CO32- ions in sample = 69.14 %

Q: I. Name the two organic compounds. Br OH B. SH O =¢ si Br C =0 Catla

A:

Q: A student, Ken, is given a mixture containing two nitrate compounds. The mixture includes NaNO, and…

A:

Q: A laboratory technician measures 1.60 g of CuCl2(s) and prepares a solution. Whenthe solution is…

A: We have to calculate the mass of Cu produced

Q: 5 g of hydrated barium chloride is heated in a crucible until the mass of the sample no longer…

A:

Q: An engineer has filed for a patent for a brand new allot to be used in golf club heads. The…

A:

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".