n=20 mol
(NH)4 SO4
Atomic masses :
N- 14
H- 1
S- 32
O- 16
Therefore M= 14×2 + 1×8 + 32 + 16×4
= 132
m= nM
= 20×132
= 2640g
Answer: D:wavelenght
Explanation: Students will understand that shorter wavelengths have higher frequency and energy.
Answer:
B) 244.5
Explanation:
2.62 torr =349.3046 pascals.
349.3046*0.7 sq meter = 244.5 N
Answer:
Carbon is bigger
Explanation:
There are twice as many number of hydrogen-to-oxygen atoms. This applies to carbon atoms as well when compared to hydrogen atoms.
If you clear volume in the density equation:
![\rho = \frac{m}{V}\ \to\ V = \frac{m}{\rho}](https://tex.z-dn.net/?f=%5Crho%20%3D%20%5Cfrac%7Bm%7D%7BV%7D%5C%20%5Cto%5C%20V%20%3D%20%5Cfrac%7Bm%7D%7B%5Crho%7D)
The greater the density the lower the volume. This means, the volume of gold nugget will be smaller than the volume of iron pyrite nugget.
![V_{gold} = \frac{m}{\rho} = \frac{50\ g}{19.3\ g/cm^3} = \bf 2.59\ cm^3](https://tex.z-dn.net/?f=V_%7Bgold%7D%20%3D%20%5Cfrac%7Bm%7D%7B%5Crho%7D%20%3D%20%5Cfrac%7B50%5C%20g%7D%7B19.3%5C%20g%2Fcm%5E3%7D%20%3D%20%5Cbf%202.59%5C%20cm%5E3)