Answer:
<h2>1. Ionic compound-

</h2><h2>2. Polar molecular compound-

</h2>
Explanation:
Mg is a metal that has 12 atomic numbers and thus its electronic configuration is
. The outer most shell of this element has 2 electrons so it loses 2 electrons and thus form
ions. Br is a nonmetal and has 35 atomic number so its electronic configuration is
. Since its outermost shell has 7 electrons so it can accept one electron and thus forms
. So magnesium ion and bromide ion combine and forms an ionic compound
.
P is also a nonmetal and combine with Br with covalent bond and due to electronegativity differences form polar covalent compound such as
.
Answer:
q = -176kJ
Explanation:
HCl and NH3 reacts as following to NH4Cl
HCl(g) + NH3(g)=========>NH4Cl(s) : ΔH = -176 KJ
Clearly,
ENERGY IS EVOLVED MEANING IT IS A EXOTHERMIC REACTION .
therefore, the value of heat evolved as q = -176kJ
Given mass of tungsten, W = 415 g
Molar mass of tungsten, W = 183.85 g/mol
Calculating moles of tungsten from mass and molar mass:

Mass of lead (II) chromate is 51 g. The molecular formula is
and its molar mass is 323.2 g/mol
Number of moles can be calculated using the following formula:

Here, m is mass and M is molar mass.
Putting the values,

Therefore, number of moles of lead (II) chromate will be 0.1578 mol.
Answer:
a) find attached image 1
b) find attached image 2
Explanation :
The more stable radical is formed by a reaction with smaller bond dissociation energy.
since the bond dissociation for cleavage of the bond to form primary free radical is higher, more energy must be added to form it. This makes primary free radical higher in energy and therefore less stable than secondary free radical.