With the advent of photosynthesis, the amount of oxygen in the atmosphere has variedover the eons up to 35 % by volume, theoretically leading to larger plants and animals.The current concentration is 21 % oxygen, 78 % nitrogen, and 1 % other gases such asargon and carbon dioxide.Assuming an atmosphere of 16 % oxygen, to the nearest whole number (no decimal)what would be the ideal volume of water (in mL) initially placed in a 25 mL graduatedcylinder (assuming the graduation goes up to the lip of the container) for optimalcombustion (biggest explosion) if we collected pure hydrogen by displacement as in thisexperiment? Make sure to account for the stoichiometry of the combustion, that allgases involved are diatomic, and that equal moles of different ideal gases occupy equalvolumes at the same temperature.Answer:

Approach to solving the question:Detailed explanation:Examples:ANSWER IS 12 ML H20 Key references:…

Answered: With the advent of photosynthesis, the…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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Find the density of nitrogen (N2) and oxygen (O2) at STP assuming they behave like an ideal gas.
w i 1) Destruction of the ozone layer takes place when its component ozone (03) is converted O3 + 0202 into oxygen gas (O2) as shown by the following chemical equation. Although degradation of O3 happens naturally, there are some man-made substances that cause this process to take pla ce at a rate which is harmful to the environment. One such substance is chlorofluorocarbon or CFC. In the presence of ultraviolet (UV) radiation, a de chlorine (Cl) atom from CFC reacts with O3 and converts it to 02 at a faster rate. This is Cl + O3 → Clo + O2 Clo + 0- Cl + O2 shown by the 2 equations below. In this process, the chlorine atom acts as 2) Pepsin is an enzyme present in gastric juice. In the stomach, it catalyzes the breaking ! down of proteins into shorter polypeptides. Therefore, proteins are of pepsin. the 3) The unstable compound that is formed when the disaccharide maltose binds with the active site of the enzyme maltase is called 4) The binding of ATP with the enzyme pyruvate kinase…
Chloroform is a volatile (readily changes from liquid phase to gaseous phase) once commonly used in the laboratory but now being phased out due to its ozone depletion potential. If the pressure of gaseous chloroform in a flask is 195 Torr at 25°C and its mass for 1 liter of gas is 1.25 g, what is the molar mass (g/mol) of chloroform? O None of these O 119 g/mol 10.0 g/mol O 76.3 g/mol
The atmospheric ratio of peroxyacetic nitric anhydride (PAN) to PAN + inorganic nitrite varies from less than 0.1 to 0.9. High values of the ratio are associated with photo chemically aged air masses, situations where precipitation has recently occurred, and situations were unusually high nighttime nitrogen oxide concentrations are found. What do these observations tell us about the factors affecting the relative rates of formation and removal of nitrogen oxide compounds?
When warm summer temperatures set in and the surface of a lake reaches 20° Celsius, how much oxygen could the lake water hold? 1.021 ppm 9.1 ppm Nonel
H2 + 02 > H20 for which the equilibrium constant K = 627 at 150 C. Suppose 0.515 mol of H2 and 0.350 mol of 02 were placed in a 2-liter vessel at 80 C. What will the concentrations of all species be once equilibrium is established?
Ozone in the upper atmosphere is depleted when it reacts with nitrogen oxides. The rates of the reactions of nitrogen oxides with ozone are important factors in deciding how significant these reactions are in the formation of the ozone hole over Antarctica as shown. One such reaction is the combination of nitric oxide, NO, with ozone, O3:
How many liters of dry hydrogen gas, measured at 798 mmHg and 21C, will be released by the decomposition of 230 mL of H20 at 1.42atm and 30C? 2 H20 (g) → 2 H2 (g) + O2 (g) Answer to 3 decimal places. Your Answer: Answer units
In 5H2O how many oxygen (O) atoms are present
Determine the concentrations (in mole fraction) of all species in the exhaust from the incomplete combustion (90% combustion) of butane (C4H10). Assume 50% excess air with respect to complete combustion is the source for the oxygen. Air composition is 79 mol% N2 and 21 mol% O2.
Vo [S] S1 S2 0.0001 33 17 0.0002 50 29 0.0005 71 50 0.001 83 67 0.002 91 80 0.005 96 91 0.01 98 95 0.02 99 98 0.05 100 100 5.0 100 100 Which of the following is a correct conclusion from this data? A) the Km for both Si and S2 is 100 B) the Km for both Si and S2 is 50 C) the Km for both S1 and S2 is 5.0 D) the Km for Sı is 0.0002 and for S2 is 0.0005 E) the Km for Sı is 50 and for S2 is 29 Which of the following is a correct conclusion from this data? A) Sı is a better substrate because it has a higher Vmax B) S2 is a better substrate because it has a higher Vmax Si is a better substrate because it has a lower Km D) Si is a better substrate because it has a higher Km E) None of the above In plots of 1/V vs. 1/[S], the Y-intercept (i.e. the value of Y when X = 0) is S2. for both Sı and A) 5 B) 1/5 C) 100 D) 1/100 E) None of these
Human blood has a pH of approximately 7.4 due to the carbonic acid/bicarbonate ion (H2CO3/HCO3−) buffer system. Any pH changes below 6.8 or above 7.8 can lead to death! Carbonic acid dissociates to form water and carbon dioxide in the equilibrium shown below. This process is crucial in respiration.H2CO3 (aq) ⇋ CO2 (g) + H2O pKa1 = 2.77 Carbonic acid dissociates in water to form the bicarbonate ion and the hydroxonium ion by the following equilibrium reaction:H2CO3 (aq) + H2O ⇋ H3O(aq)+ + HCO3− pKa2 = 3.70 (ii) Explain how a 25% increase in carbonic acid levels may impact the availability of lead if a tainted calcium supplement ends up on the local market

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