Using the balanced equation 3Ba+Al 2 (SO 4 ) 3 ***>2Al+3BaSO 4 how many grams of aluminum will be produced if 1.0 g of Ba react with 1.80 g of Al 2 (SO 4 ) 3 )

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your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.

weight of any object is given by

w = m*g

where m is mass of the object and g is the acceleration due to gravity.

for earth the value of g is 9.8 m/s^2 so

w=117.6 n m=12 g=?

117.6=12g => g=9.8 m/s^2

which is the force of gravity on earth.

the seeing the electronic configuration we can say that the element is fluorine.

fluorine is the most electronegative element in the periodic table.

but by only seeing the configuration we cannot say about its reactivity because we don't know if its configuration after excitation or by addition of electrons.

but if not then, it is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. as the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine.