How much heat is required to increase the temperature of 100.0 grams of iron from 15.0oc to 40.2oc? (the specific heat of iron is 0.46 j/g xoc) 2520 j 46 j 1160 j 1850 j 690 j

Answer : The heat required is 1160 J.

Explanation :

Formula used :

or,

where,

Q = heat required = ?

m = mass of iron = 100.0 g

c = specific heat of iron =

= initial temperature  =

= final temperature  =

Now put all the given value in the above formula, we get:

Therefore, the heat required is 1160 J.

c. orbital shape i hope this is correct

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.