What is the molar mass of ca(no3)2?
a) 102.2 g/mol
b) 134.1 g/mol
c) 164.1 g/mol
d) 204.2 g/mol
pls answer !

C) 164.1 g/mol

Explanation:

First calculate the molecular mass of Ca(NO3)2

Atomic Mass of Calcium (Ca) = 40.078 amu

Atomic Mass of Nitrogen (N) = 14.006 amu

Atomic Mass of Oxygen (N) = 15.99 amu

Where amu is Atomic Mass Unit and it is unit for atomic mass or molecular mass of an atom or molecule respectively.

Now remember to take atomic mass of Oxygen thrice because its three atoms are present and molecular mass of NO3 twice because you can see that its two molecules are attached with Calcium (Ca)

Molecular mass of Ca(NO2)3 = 40.078 + (14.006 + 15.99 x 3) x 2

                                                 = 40.078 + (14.006 + 47.97) x 2

                                                 = 40.078 + 123.95

                                                  = 164.03 amu

Now one mole can be defined as the molecular mass of a substance in grams which means molar mass of Ca(NO3)2 is 164.03 grams which is approximately eqaul to 164.1 grams.

Since it is the mass of one mole of Ca(NO3)2, it can be represented as:

164.1 g/mole

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6

a polar bond is formed when electrons are shared unevenly between atoms