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The water at the gas-collecting port is assumed to be 25C, but it is actually 15C. How will this error affect the reported mass of aluminum in the sample?
A diploid organism with a 30,000-kb haploid genome contains 19% T residues. Calculate the number of A, C, G, and T residues in the DNA of each cell in this organism.
A drop of oil volume 0.05 cm3 is released from a medicine dropper on to a calm surface of a pond where it spreads out to cover an area of 40 cm2. Calculate the diameter of an oil molecule.
Strontium metal crystallizes in a cubic unit cell which has an edge length of 612 pm. If the mass of an atom of Sr is 87.62 amu, and the density of Sr metal is 2.54 g/cm3
To ensure the impurity does not exceed this amount, how much water must be added to the solution before the temperature is dropped if the initial solution weighed 500 kg? How much Na2S2O2 will be generated in this process?
calculate the ph of a buffer solution obtained by mixing 400.0 ml of 0.200 m acetic acid solution and 100.0 ml of a
A rigid container of O2 has a pressure of 388kPa at a temperature of 713K. What is the pressure at 273K.
If I try to make a battery using copper and silver electrodes (along with the corresponding ionic solutions), will it work? Why or why not
If the pressure of a gas is 39.18 atm in a piston, what is the final pressure, in atm, if the volume of the piston is multiplied by 4 at a constant temperature?
Suppose that a 2.00-L metal bottle that contains air at 113K and 2.5 atm pressure is sealed off. If we inject 60.0 mL of liquid helium and allow the entire system to warm to room temperature (25°C), what is the pressure inside the bottle?
The vapor pressure of water at 45.0 degrees celcius is 71.93 mmHg. Calculate the vapor pressure of a solution of 1.50m K2CO3 at this temperature (assume 100% dissociation)
What mass of Cl2 gas will occupy the same volume at 10 C as that occupied by 3.20 g of SO3 gas at 40 C if the pressure of the two gases is the same
Draw a diagram showing the hydrogen bonding of an ammonia molecule with two other ammonia molecules. (Draw complete Lewis structures.
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