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The water at the gas-collecting port is assumed to be 25 degrees C, but it is actually 15 degrees C. How will this error affect the reported mass of aluminum in the sample?
This comes from an Aluminum Analysis lab in which hydrogen gas resulting from the reaction between aluminum and 6M HCl is collected over water.
If the flask has a volume of 0.500 L, what is the minimum mass of PH3BCl3(s) that must be added to the flask in order to achieve equilibrium
calculate the equilibrium constant for the reaction. b. what is the chemical significance of the value of the equilibrium constant?
What concentration of aqueous CaCl2 solution freezes at -10.2ºC? The freezing point of pure water is 0.0ºC and Kf of pure water is -1.86ºC/m.
Determining the free ions of calcium on a similar sample of blood. recommend if the sample requires pretreatment or if it can be calculated directly In each case.
The vapor pressure for water at 20 degrees C is 17.5 mmHg. What is the vapor pressure of water over a solution prepared from 2.00 x 10^2 g of sucrose (C12H22O11) and 3.50 x 10^2 g of water
how many grams of pbcl2nbspwill be produced if excess hcl is added to 30.00 ml of a 0.2319m solution of
A sample of ammonia, NH3, contains 3.3 x 1021 hydrogen atoms. How many moles of ammonia are in this sample?
How much heat is given off when 11.0 grams of manganese is converted to Mn2O3(s) at standard state conditions? Hf of Mn2O3(s) is -962.3 kJ/mol.
In the fingerprint region of the IR spectrum, what do the absorptions at 746 and 688 cm-1 tell you about the substitution pattern of this compound
calculate how many liters of seawater are needed to produce 79.1 L of fresh water at 20 °C with an applied pressure of 50.0 bar.
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.
what is the maximum number of electrons in an atom that can have the following set of quantum numbers? In some cases, the answer may be "none" In such cases, explain why "none" is the correct answer a) n=3 b) n=3 l=2 c) n= 4 l= ml=-1 and ms = -1/2..
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