A sample of a metal is heated in air to produce a metal oxide. Use the data in the table to determine the mass of oxygen in the product. Mass of crucible 30.843 g
Mass of crucible and metal 31.157 g
Mass of crucible and product 31.397 g
mass:
g

some sources quote the lethal dose, for an average 170lbs opiate-naive individual is between 75 and 375 mg

answers: to make sure that all of the broken pieces of tablet were added to the water, to allow for fair comparison of all three trials, with different particle sizes to avoid experimental error

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.

consider the reaction below.

 no rx

at 500 k, the reaction is at equilibrium with the following concentrations.

[pci5]= 0.0095 m

[pci3] = 0.020

[ci2] = 0.020 m

what is the equilibrium constant for the given reaction?

0.042

0.42

2.4

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