Water is a very good solvent and it dissolves most substances that are not organic, like minerals etc. It is a very good solvent because it is polar. It has one positively charged end and one negatively charged and thus it can attract many molecules and even break up their bonds with other molecules; this results in dissolution. If there was truly a universal solvent, that would be first of all dangerous to humans since it would just dissolve us. It would be also dangerous to store and precious items could be lost within it since they would be dissolved.
The number of moles is given by:
Mass of hydrogen, = (given)
Molar mass of hydrogen, =
Number of moles of hydrogen, =
Reaction between to form is:
From the reaction it is clear that 3 moles of hydrogen gives 2 moles of ammonia and 1 mole of nitrogen gives 2 moles of ammonia .
So, of gives:
Number of moles of ammonia, =
Since, in one mole of ammonia, there are molecules of ammonia, .
So, number of molecules in of ammonia, is:
Hence, the number of molecules of ammonia produced by of is .
Answer:
sample C have the highest density
Explanation:
Data Given:
mass of sample A = 224.96 g
Convert g to kg
1 g = 0.001 Kg
224.96 g = 224.96 x 0.001 = 0.225 kg
mass of sample B = 0.55632 Ibs
Convert lbs to kg
2.21 lb = 1 kg
0.55632 Ibs = 0.55632 / 2 = 0.278 kg
mass of sample C = 0.30648 kg
Solution:
To calculate density of every sample we have the following formula
d = m/v . . . . . . . . . . (1)
It is clear from the formula that density have direct relation with mass and inverse relation with volume, that is density increase with increasing in mass.
As we have same volume of wood sample, so suppose that each sample have volume of 2 cm³
So now we find density for each sample
As for sample A
- mass of sample A = 0.225 kg
Put values in formula 1
d = 0.225 kg / 2 cm³
d = 0.128 kg/cm³
As for sample B
- mass of sample A = 0.278 kg
Put values in formula 1
d = 0.278 kg / 2 cm³
d = 0.139 kg/cm³
As for sample C
- mass of sample C = 0.30648 kg
Put values in formula 1
d = 0.30648 kg / 2 cm³
d = 0.153 kg/cm³
So it shows that sample C have the highest density that is 0.153 kg/cm³ . As it have the highest mass too among all samples.
Answer:
When iron reacts with dilute H2SO4, iron (II) sulphate with the evolution of hydrogen gas is formed.