A47.1 g sample of a metal is heated to 99.0°c and then placed in a calorimeter containing 120.0 g of water (c = 4.18 j/g°c) at 21.4°c. the final temperature of the water is 24.5°c. which metal was used?

Answer : The metal used was iron (the specific heat capacity is ).

Explanation :

In this problem we assumed that heat given by the hot body is equal to the heat taken by the cold body.

where,

= specific heat of metal = ?

= specific heat of water =

= mass of metal = 47.1 g

= mass of water = 120 g

= final temperature of water =

= initial temperature of metal =

= initial temperature of water =

Now put all the given values in the above formula, we get

Form the value of specific heat of metal, we conclude that the metal used in this was iron.

Therefore, the metal used was iron (the specific heat capacity is ).

answer: option (b) is the correct answer.

explanation:

a covalent bond is formed by sharing of electrons. whereas polarity arises due to difference in electronegativity of two atoms.

therefore, more is the electronegativity of an atom which combines with the titanium, more readily it will induce a partial positive and negative charge.

thus, out of the given options fluorine is most electronegative and has an incomplete octet. therefore, it will readily combine with titanium to share the electrons and complete its octet.  

the atomic mass is the bottom number on the element.

-steel jelly