Most common source of copper (Cu) is the mineral Chalcopyrite(CuFeS2). How many kilograms of chalcopyrite must be mined to obtain 470. G of pure Cu? Express your answer to three significant figures include include the appropriate units

Consider a small bird of mass 30 g. What is the minimum mass of glucose that it must consume (and burn) to fly up to a branch 10 m above the ground?

Please answer question 20 part A and B

Burning coal that contains sulfur releases sulfur dioxide gas into the atmosphere where it combines with water to form sulfurous and sulfuric acid, thereby producing acid rain. Assume sulfur in coal is in the form of pyrite (FeS2(s)), which reacts with molecular oxygen to produce Fe2O3(s) and SO2(g). Write the balanced equation for this reaction and report the sum of the stoichiometric coefficients, written as integers.

Hydrogen peroxide, H 2 O 2 , is a colorless liquid. A concentrated solution of it is used as a source of oxygen for rocket propellant fuels. If the solution has 0.401 mols of H 2 O 2 , what is the mass of H 2 O 2 Answer to decimal places and include the unit.

The Haber process is used to industrially produce ammonia (NH3). Ammonia is the active ingredient in a variety of household cleaners. The data table below summarizes the experimental quantities of reactants and products collected from a specific batch. N2 (g) + 3 H2 (g) --> 2 NH3 (g) Substance Amount Used N2 10,000 g H2 15,000 g Amount Produced 11,150 g Substance NH3 If the company chemist calculated that 12,163 g of NH3 should be produced, what is the percent yield?

6. Consider the following chemical reaction: 2 Cr(OH)3(aq) >Cr₂O3(s) + 3H₂0(1) 12.00 moles of chromium (III) hydroxide is decomposed. Calculate moles of the water produced. O 18.00 moles O 1.500 moles O 4.00 moles O 12.00 moles

Aqueous hydrochloric acid (HCI) will react with solid sodium hydroxide (NaOH) to produce aqueous sodium chloride (NaCl) and liquid water (H,O). Suppose 2.19 g of hydrochloric acid is mixed with 3.7 g of sodium hydroxide. Calculate the maximum mass of sodium chloride that could be produced by the chemical reaction. Round your answer to 3 significant digits. Ox10 ?

This is the chemical formula for nickel tetracarbonyl (a powerfully poisonous liquid used in nickel refining): Ni(CO)4 A chemical engineer has determined by measurements that there are 4.98 moles of nickel in a sample of nickel tetracarbonyl. How many moles of carbon are in the sample? Round your answer to 3 significant digits. | mol x10 券

Please help me, and double and triple check your answers previous tutors got questions wrong