Phosphorus reacts with oxygen to form diphosphorus pentoxide, P,O,. 4 P(s) + 50,(g) –→ 2P,0,(s) How many grams of P,O, are formed when 6.71 g of phosphorus reacts with excess oxygen? Show the unit analysis used for the calculation by placing the correct components into the unit-factor slots. 6.71 g Px =g P,0, Answer Bank 32.00 g 0, 4 mol P I mol P 30.97 g P 2 mol P,O, I mol P,0, I mol 0, 141.94 g P,0, 5 mol 0,

Phosphorus reacts with oxygen to form diphosphorus pentoxide, P,O,. 4 P(s) + 50,(g) –→ 2P,0,(s) How many grams of P,O, are formed when 6.71 g of phosphorus reacts with excess oxygen? Show the unit analysis used for the calculation by placing the correct components into the unit-factor slots. 6.71 g Px =g P,0, Answer Bank 32.00 g 0, 4 mol P I mol P 30.97 g P 2 mol P,O, I mol P,0, I mol 0, 141.94 g P,0, 5 mol 0,

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter2: Chemical Compounds

Section: Chapter Questions

Problem 143QRT: The present average concentration (mass percent) of magnesium ions in seawater is 0.13%. A chemistry...

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Assume that the radius of Earth is 6400 km, the crust is 50. km thick, the density of the crust is 3.5 g/cm3, and 25.7% of the crust is silicon by mass. Calculate the total mass of silicon in the crust of Earth.
4.69 The pictures below show a molecular-scale view of a chemical reaction between H2 and CO to produce methanol, CH3OH. The box on the left represents the reactants at the instant of mixing, and the box on the right shows what is left once the reaction has gone to completion. Was there a limiting reactant in this reaction? If so, what was it? Write a balanced chemical equation for this reaction. As usual, your equation should use the smallest possible whole number coefficients for all substances.
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The present average concentration (mass percent) of magnesium ions in seawater is 0.13%. A chemistry textbook estimates that if 1.00 × 108 tons Mg were taken out of the sea each year, it would take one million years for the Mg concentration to drop to 0.12%. Do sufficient calculations to either verify or refute this statement. Assume that Earth is a sphere with a diameter of 8000 mi, 67% of which is covered by oceans to a depth of 1 mi, and that no Mg is washed back into the oceans at any time.
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