Explanation:
Given: <u>Molarity = 0.01 M</u>
Let the volume of the solution = 1 L
Hence, moles = 0.01 moles (Molarity*Volume)
Molar mass of urea = 60 g/mol
So, mass of urea = moles x molar mass = 0.01 moles x 60 g/mol = 0.6 g = 0.0006 kg ,
Given: Density of solvent = Density of solution = 1 Kg/liter (Water).
So,
The mass of solution = vol x density = 1 L x 1 kg/L= 1 kg
Also,
Mass of solution = Mass of solute + Mass of solvent
1 kg= 0.0006 kg + mass of solvent
Mass of solvent = 1-0.0006 = 0.9994 kg
Molality is the moles of solute present in 1 kg of the solvent. So,
<u>Molaity = ( 0.01/0.9994) ≈ 0.01 m</u>
<u>Molarity = Molality</u>
Hence proved.
It’s A .. I think I hope this helps !
About a month
because it takes the moon 29.5 days to completely cycle through all eight phases
Answer :
(a)
In this Lewis dot structure, there are 3 bond pair and 0 lone pair on the central atom. The total number of electron pair is 3. So, the hybridization of the molecule will be, and the geometry will be, trigonal planar.
(b)
In this Lewis dot structure, there are 4 bond pair and 0 lone pair on the central atom. The total number of electron pair is 4. So, the hybridization of the molecule will be, and the geometry will be, tetrahedral.
(c)
In this Lewis dot structure, there are 3 bond pair and 1 lone pair on the central atom. The total number of electron pair is 4. So, the hybridization of the molecule will be, but the the fourth position will be occupied by one lone pair. Hence, the geometry will be, trigonal pyramidal not tetrahedral.
(d)
In this Lewis dot structure, there are 2 bond pair and 1 lone pair on the central atom. The total number of electron pair is 3. So, the hybridization of the molecule will be, but the the third position will be occupied by one lone pair. Hence, the geometry will be, bent not linear.
The image is also shown below.