Molar mass of SnO_2:-
1 mol of SnO_2 produces 2mol of water
- 0.5mol of SnO_2 will produce 0.5(2)=1mol of water
Answer:
1. Percentage by weight = 0.5023 = 50.23 %
2. molar fraction =0.153
Explanation:
We know that
Molar mass of HClO4 = 100.46 g/mol
So the mass of 5 Moles= 5 x 100.46
Mass (m)= 5 x 100.46 = 502.3 g
Lets assume that aqueous solution of HClO4 and the density of solution is equal to density of water.
Given that concentration HClO4 is 5 M it means that it have 5 moles of HClO4 in 1000 ml.
We know that
Mass = density x volume
Mass of 1000 ml solution = 1 x 1000 =1000 ( density = 1 gm/ml)
m'=1000 g
1.
Percentage by weight = 502.3 /1000
Percentage by weight = 0.5023 = 50.23 %
2.
We know that
molar mass of water = 18 g/mol
mass of water in 1000 ml = 1000 - 502.3 g=497.9 g
So moles of water = 497.7 /18 mole
moles of water = 27.65 moles
So molar fraction = 5/(5+27.65)
molar fraction =0.153
Answer:
<h3>» a. Magnesium</h3>
Explanation:
<h3>• Magnesium is least reactive and </h3>
<h3>• Magnesium has atomic number 12. Its electronic configuration is 2,8,2 . Thus, it has </h3><h3>2 valence electrons.</h3>
Answer: <span>A) can form hydrogen bonds.
Water has a high heat capacity. Water is also a good solvent since many things, mostly polar chemical compound, that can be dissolved using it. Water is definitely polar. Water structure is well known to be like "Mickey mouse", causing it to have a more positive pole at the side with Mickey's ears.
Water has hydrogen bond that was causing it has a high boiling point.</span>
