CaSO4.2H2O is a white crystal at room temperature. It is soluble in water. Gypsum can be used as a fertilizer.
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Answer:
Nobelium is made by the bombardment of curium (Cm) with carbon nuclei. Its most stable isotope, 259No, has a half-life of 58 minutes and decays to Fermium (255Fm) through alpha decay or to Mendelevium (259Md) through electron capture.
Explanation:
Answer: Theoretical yield of
produced by 8.96 g of S is 33.6 g
Explanation:
To calculate the moles :
![\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}](https://tex.z-dn.net/?f=%5Ctext%7BMoles%20of%20solute%7D%3D%5Cfrac%7B%5Ctext%7Bgiven%20mass%7D%7D%7B%5Ctext%7BMolar%20Mass%7D%7D)
![\text{Moles of} S=\frac{8.96g}{32g/mol}=0.28moles](https://tex.z-dn.net/?f=%5Ctext%7BMoles%20of%7D%20S%3D%5Cfrac%7B8.96g%7D%7B32g%2Fmol%7D%3D0.28moles)
The balanced chemical equation is:
According to stoichiometry :
2 moles of
produce = 3 moles of ![SO_3](https://tex.z-dn.net/?f=SO_3)
Thus 0.28 moles of
will produce=
of
Mass of ![SO_3=moles\times {\text {Molar mass}}=0.42moles\times 80g/mol=33.6g](https://tex.z-dn.net/?f=SO_3%3Dmoles%5Ctimes%20%7B%5Ctext%20%7BMolar%20mass%7D%7D%3D0.42moles%5Ctimes%2080g%2Fmol%3D33.6g)
Thus theoretical yield of
produced by 8.96 g of S is 33.6 g
A mole contains Avogadro’s number of particles of a substance.
The molecular weight of a given compound would simply the
sum of the molar weights of each component.
The molar masses of the elements are:
C = 12 amu
H = 1 amu
N = 14 amu
O = 16 amu
where 1 amu = 1 g / mol
Since there are 6 C, 5 H, 1 N and 2 O, therefore the
total molecular weight is:
molecular weight = 6 (12 amu) + 5 (1 amu) + 1 (14 amu) +
2 (16 amu)
molecular weight = 123 amu
Therefore the molecular weight of nitrobenzene is 123 amu
or which is exactly equivalent to 123 g / mol.