Enthalpy change = energy products -
energy reactants
Standard enthalpy change of a reaction is the energy change when the number of moles of reactant in a reaction react together to form products under standard condition.
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Answer:
When this equation is solved, the two values of the unknown are 0.0643 and -0.082
Explanation:
Given
--- the actual equation
Required
The values of x
We have:
Cross Multiply
Multiply both sides by 100
Open bracket
Rewrite as:
Using quadratic formula:
Where:
So, we have:
Split
<span>Avogadro's number
represents the number of units in one mole of any substance. This has the value
of 6.022 x 10^23 units / mole. This number can be used to convert the number of
atoms or molecules into number of moles. We calculate as follows:
</span>5.31×10^21 platinum atoms ( 1 mol / 6.022 x 10^23 atoms ) ( 78 grams / 1 mol ) = 0.6878 grams platinum
Answer:
they are eamples of chemical properties
Explanation:
flammibility is the chemical makeup of the element that makes it flamable and reactivitie is the chemical makeup of an element that is able to reacte to another element
