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indicate whether the trailing zero in each value is significant, not significant or possibly significant
540+- 0.50.540540540 +50.000+- 0.5
the mass propotion of Mg:N=18:7. if 3.60 g reacts with 4.20 g N2 gas so the mass of product Mg3N2 is?
tryptophan in the environment was exhausted, the bacteria started to excrete a metabolite on the tryptophan biosynthetic pathway. why didnt the bacteria excrete the metabolite before exhausting the environmental tryptophan?
The freezing temperature of ethanol is -114.0 oC, the density is 0.789 g/cm3, and Kf is 1.99oC/m. Calculate the new freezing point when 0.100 L of methanol
Diamonds have successfully been prepared by submitting graphite to high pressure. Calculate the approximate minimum pressure needed at 298 K to turn graphite into diamond.
Compute the final temperature of the solution (assuming no heat lost to the surroundings ) the solution has a specific heat capacity = 4.18 J/°C·
Nitrogen oxide is a pollutant in the lower atmosphere that irritates the eyes and lungs and leads to the formation of acid rain. Nitrogen oxide forms naturally in atmosphere according to the endothermic reaction: N2+O2=2NO(g) Kp= 4.1x10^-31 at 298..
What is the molar solubility of Co(OH)2 in a buffered solution that has a pH of 10.43?
All molecular compounds may have London, dipole-dipole, and hydrogen-bonding intermolecular forces affecting their physical and chemical properties.
What would you expect the structure of the dinitro ester to be? Consider the directing effects of the ester and the first nitro group upon the addition
What is the energy released when 0.711 g are converted to energy? Express your answer in joules. For self-consistent units you must use kg because 1 J = 1 kg m2/s2.
175 g of water was heated from 15 degrees to 88 degrees C. How many kilocalories were absorbed by the water?
Use the following data, as appropriate to estimate the molarity ofa saturated aqueous solution of Sr(IO3)2.
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