The human body burns glucose (C6H₁2O6) for energy according to this chemical reaction: C6H12O6 +60₂-6CO₂ + 6H₂O The products of the reaction are carbon dioxide (CO₂) and water (H₂O). Interestingly, all of the carbon dioxide and much of the water exits the body through the lungs: on every breath, the average person exhales 500. mL of air, which is typically enriched to 4% CO₂ and 5% water vapor by volume. In short, when a person loses weight by dieting, the weight that is lost actually departs his body as a gas, every time he exhales. Each kilogram of body fat lost requires exhaling about 2.8 kg of carbon dioxide. Calculate how many breaths it takes an average person to "exhale" 0.50 kg of fat. Round your answer to the nearest thousand.

When the following molecular equation is balanced using the smallest possible integer coefficients, the values of these coefficients are: CH4 (g) + CCI4 (g) →→→ CH₂Cl₂ (g)

The human body burns glucose (C6H₁2O6) for energy according to this chemical reaction: C6H₁206+60₂-6CO₂ + 6H₂O The products of the reaction are carbon dioxide (CO₂) and water (H₂O). Interestingly, all of the carbon dioxide and much of the water exits the body through the lungs: on every breath, the average person exhales 500. mL of air, which is typically enriched to 4% CO₂ and 5% water vapor by volume. In short, when a person loses weight by dieting, the weight that is lost actually departs his body as a gas, every time he exhales. Each kilogram of body fat lost requires exhaling about 2.8 kg of carbon dioxide. Calculate how many breaths it takes an average person to "exhale" 3.00 kg of fat. Round your answer to the nearest thousand. You'll need to know that the density of CO₂ is 2.0 kg/m³. 0 X

Lead (Pb) has been used for centuries. The Romans used it in their plumbing systems - the symbol for lead (Pb plumbus). To extract the metal, lead (II) sulfide (mineral galena) is roasted in air to form lead (II) oxide (PbO): 2 PbS(s) + 3 O2(g) → 2 PbO(s) + 2 SO2(g) AHrxn = -827.4 kJ Then the lead (II) oxide is reduced with carbon to the metal lead: PbO(s) + C(s) Pb(s) + СО (9) AHrxn = +106.8 kJ a) Use the equations above and Hess's Law to determine the enthalpy of change for the following reaction: PbS(s) + /2 O2(g) + C(s) → Pb(s) + CO (g) SO2(g) ΔΗη [ Select ] kJ (1 mol PbS) b) How much energy (kJ) absorbed (+AHxn) or evolved (-AHpxn) when 400.0 grams of lead (II) sulfide (PbS(s) is converted to lead (Pb)? ΔΗΡη [ Select ] kJ / 400.0 g PbS

Consider the reaction for the production of NO₂ from NO: 2 NO(g) + O₂ (g) → 2 NO₂ (g)

Hydrogen is manufactured on an industrial scale by this sequence of reactions: CH, (g) + H,0 (g) CO (g)+3 H, (g) K1 CO (g) + H,0 (g)= CO, (g)+H, (g) K2 The net reaction is: CH4 (g) +2 H,0 (g) CO, (g)+4H, (g) K Write an equation that gives the overall equilibrium constant K in terms of the equilibrium constants K, and K,. If you need to include any physical constants, be sure you use their standard symbols, which you'll find in the ALEKS Calculator. K

Which of the following correctly expresses the balanced equation for the word equation:

Hydrogen sulfide, H2S, is produced during decomposition of organic matter. When 0.4190 mol H2S burns to produce SO2 (9) and H20(g), -217.0 kJ of heat is released. What is this heat in kilocalories? Heat = kcal

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peact Baking soda is often included in recipes to make food rise. When heated, it will produce sodium carbonate, water vapor, and carbon dioxide. Which of the five types of chemical reactions does the equation represent? Provide evidence and reasoning