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The amount of cadmium in a sample is determined by AAS. The standard solutions produce a straight calibration curve with a slope of 0.1024 +_0.0082 abs. units/ppm and a y-intercept of 0.0105 +_ 0.0076 abs. units. The absorbance of the unknown solution A=0.4862 +_ 0.0184 abs. units. Determine the un certainty in the concentration of the unknown.
How many liters of oxygen are needed to exactly react with 19.8 g of methane at STP?
In the haloform reaction, once the first alpha-hydrogen atom is replaced by a halogen atom, each successive hydrogen is more easily substituted
What is the specific heat capacity (in SI unit) of the following.
How can we explain the ability of an electron to cross through a node, such as the nucleus, to occupy the region within an entire orbital?
5.0 g of H2O at 23.0 oC is added to 100.0 g of H2O at 67.5 oC. What is the temperature of the resulting mixture
When 1 liter of nitrogen gas reacts with 3 liters of hydrogen gas at constant temperature and pressure, how many liters of ammonia gas will be produced?
Equilibrium between the composition of Hydrogen sulphide in the gaseous and liquid phases can be represented as Yn=48.3Xn.
The solubility of silver chromate, which has a Ksp equal to 9.0e-12 at 25 degrees celsius, is determined in water and in two different solutions. Predict the relative solubility of silver chromate in the three solutions
Rb has two naturally occurring isotopes 85Rb and 87Rb, with masses 84.9118 amu and 86.9092 amu, respectively. The average atomic mass is 85.468 amu.
Which substance contains molecules that will not form hydrogen bonds?
Hydroiodic acid reduces chlorine to hydrochloric acid and iodine. Enter a balanced net ionic equation for the reaction.
Use the solution pH to calculate the concentration of hydronium ion present
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