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Some bacteria are able to harvest infrared light of ? ~ 1000 nm. What is the maximum number of 1000 nm photons needed to form one ATP from ADP and Pi? Compare this number with that of photosynthetic plants.
What mass of Fe will form when 63.0g of CO reacts with 145g of Fe2O3 according to the following equation? 3CO+Fe2O3->2Fe+3CO2.
A chemist dissolves 284 mg of pure potassium hydroxide in enough water to make up 140 mL of solution. Calculate the pH of the solution.
The reaction of 2.30g N2 with excess H2 produces 2.00g NH3. The percent yield of this reaaction is?
Calculate the final pressure of a gas if a 953-mL sample of the gas at 1.25 atm and 50.0 degrees Celsius is changed to 1.55 L at 75.0 degrees Celsius.Be sure to include units and correct significant figures
Determine the rate law and the value of k for the following reaction using the data provided
Calculate the molarity of a Ca(OH)2 solution if it takes 25.0 mL to titrate 0.650 g of KHP in a standardization titration. (KHP has one H+ and a formula weight of 204.2 g/mol.)
What is the heat change of H 2 O If the final temperature of the mixture = 25 degree celsius?
4HCl + MnO2 = MnCl2 + 2H2O + Cl2 When 1.22 mol of HCl reacts with excess MnO2, how many moles of Cl2 form?
A gas sample containing 1.47 mol at 25°C exerts a pressure of 401 torr. Some gas is added to the same container, and the temperature is increased to 50.°C. If the pressure increases to 800. torr,
Explain a resting nerve cell membrane, sodium-potassium pump, action potential and what wil happen if sodium channels were blocked
B2H6 + 3O2= B2O3+3H2O ; delta H=-2035 KJ how much heat is released when a mixture of 7.35 g B2H6 and 2.60 g O2 is burned?
Suppose that 1.419 g of impure barium hydroxide is dissolved in enough water to produce 213 mL of solution and that 40.4 mL of this solution is titrated to the stoichiometric point with 8.3 mL of 0.0696 M HCl(aq). What percentage of the impure sam..
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