Chalcopyrite is among the most common varieties of copper ore. Assuming chalcopyrite is 34.4% copper by mass (34.4 grams copper per 100. grams of ore), how many kilograms of chalcopyrite would be needed to smelt 30.0 kilograms of pure copper?

Q: You are drying a sample of Ba3(PO4)2. After 5 minutes of drying it weighs 1.2034 g. You continue to…

A: Answer: Percent change in mass will be the ratio of change in mass with initial mass, therefore %…

Q: Platinum is a precious metal that is used as a catalyst for many important industrial reactions.…

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Q: a student reacted 14.6 kg of aluminium metal with excess platinum(IV) bromide solution. After the…

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Q: A chemist prepares a solution of iron (II) chloride (FeCl₂) by measuring out 33. mg of FeCl₂ into a…

A: According to the question, The mass of the FeCl2 = 33 mg The volume of the solution = 50 mL   Find:…

Q: If you have 10 pieces of bread, 20 slices of ham, and 4 slices of cheese, how many sandwiches can…

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Q: A molecule has a mass of 4.65 x 10^-23 g. Provide two possible chemical formulas for such a…

A: Given  mass of 1 molecule = 4.65 x 10-23 g we know  mass of 1 molecule = 1 mole  1 mole = 6.022 x…

Q: Butane (C4H10) plus Oxygen yields carbon dioxide plus water

A: Given compound is butane. Butane reacts with oxygen to form carbon dioxide, water and liberate large…

Q: 9.66 x 10-3 grams of CaCO3 were present in a 5.00 mL sample of water, how many grams of CaCO3 are in…

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Q: Given the following data, what was the dollar amount of the gold that could have been extracted from…

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Q: 100.0 g of lead(II) nitrate is reacted with 50.0 g of potassium iodide (in plenty of water). How…

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Q: The nickel is comprised of two metals, nickel and copper. Surprisingly, the coin is only 25% nickel.…

A: The coin is comprised of nickel and copper. The mass percentage of nickel in the coin is = 25% The…

Q: How much nickel is contained in a nickel coin that is 8.33% (by weight) of nickel? Recall that a…

A: Shape of coin is cylindrical. Density of a substance is defined as the mass of substance per unit…

Q: Silane, SiH4, is prepared according to the following equations: Si(s)  +  3 HCl(g)  →  HSiCl3(l)  +…

A: Si(s)  +  3 HCl(g)  →  HSiCl3(l)  +  H2(g) 4 HSiCl3(l)  →  SiH4(g)  +  3 SiCl4(l)  2.42 moles of…

Q: In a laboratory experiment, an undergraduate student collected a sample of ammonium phosphate. If…

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Q: A 4.076 g sample of powder contains LiHCO3 and unknown amount of unreactive salt. When it is…

A: Given : Mass of mixture sample = 4.076 g weight of sample after decomposition = 2.580 g Since H2CO3…

Q: Emissions from the burning of fossil fuels are often reported as gigatons ( Gt ) of carbon. In a…

A: Given that : Amount of carbon emitted by China = 2.9 Gt Amount of carbon emitted by United States =…

Q: One way the U.S. Environmental Protection Agency (EPA) tests for chloride contaminants in water is…

A: Hi, as you have posted 2 questions and have not mentioned which one you want us to solve for you.…

Q: 5. Given your experience in mass determinations and with volumetric glassware, which factor used -…

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Q: A goldsmith wants to change the composition of 10 g 18K red gold (75% gold and 25% copper) into 60%…

A: 10 g 18 K red gold contains 75% gold + 25% copper

Q: The low-grade iron ore taconite, which contains Fe3O4, is concentrated and made into pellets for…

A: Given : Mass of ore used = 1 ton = 1 X 106 g                                                (since 1…

Q: A certain copper ore contains 2.32% of Cu2S by mass, and the remainder of the ore contains no…

A: Mass percent or weight percent of a substance is the mass of the component by the mass of the…

Q: How many grams of carbon are in 7.25 mL of butane (C4H10)? (density of butane = 0.601 g/cm^3)

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Q: Platinum is a precious metal that is used as a catalyst for many important industrial reactions.…

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Q: The reaction between copper and sulfur is represented by the chemical equation shown below. What is…

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Q: Calculate the number of grams of sodium in 2.20 g of this sodium-containing food additive.…

A: Given, mass of sodium benzoate (NaC7H5O2) = 2.20 g mass of sodium (Na) = ? Note: molar mass of…

Q: Chemical Formulas as Formulas: Converting between Grams of a Compound and Gram of a Constituent…

A: First convert given mass in kg  into grams .

Q: Silane, SiH4, is prepared according to the following equations: Si(s)  +  3 HCl(g)  →  HSiCl3(l)  +…

A: 1 mole of any substance have 1 Avagadro number molecules  1 Avagadro number molecules = 6.023*1023…

Q: The following equation represents the reaction between aluminum (Al) and bromine (Br2) to produce…

A: Aluminium reacts with bromine to form aluminium bromide. The equation for the balanced chemical…

Q: Question 11: You are a gemstone expert studying samples of various materials. Gemstone Hambergite…

A: From the given gemstones, the most massive gemstone is = Smoky Quartz (density = 2.65 g/mL) The…

Q: Assuming gasoline to be pure 2-methylhexane, C7 H16 (actually, it is a mixture of many substances),…

A: Molecules consumed per mile =  5.96 x 1023 molecules We need to find the mass of fuel.

Q: hich metal is the best conductor of electricity? Choose from the choices below: Gold…

A: The answer of this question is given in step 2

Q: 22.00 g sample of nitric acid (HNO3) has a purity of 96.20% by mass. Calculate the following: the…

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Q: 5) King Krator the Merciless has called on Pogo, a humble goldsmith, to make a crown for the King.…

A: The mass of gold given by King Krator to gold Smith Pogo is ---- 14 oz. The density of gold=19.3…

Q: A 20.0-gram sample of impure NaClO3 produces 4.72 L of oxygen (STP). What is the percentage purity…

A: Percentage purity can be calculated by back calculation of the amount of O2 should be produced.

Q: You have a mole of ping pong balls and want to ship them to a near-by town. You have packing boxes…

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Q: Tungsten is a very dense metal (19.3 g/cm3) with extremely high melting and boiling points (3370ºC…

A: Let the mass of CaWO4 is w gram. As given  Mass of W in CaWO4 =mass of W in 657g of FeWO4  Moles of…

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".