Show the calculation of the mole fraction and partial pressure of each gas in a mixture which consists of 2.5 moles of H2, 3.5 moles of CO2, and 4.00 moles of Ar if the total pressure of the mixture is 800 mm

We should stand up against the threat of tyranny so that it does not spread.

True

FalseWe should stand up against the threat of tyranny so that it does not spread.

True

FalseWe should stand up against the threat of tyranny so that it does not spread.

True

False

Explanation:

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chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.