Answer:
Because the freezing point of pure water is 0°C, the sucrose solution freezes at ... where K b is the molal boiling point constant and m is the concentration of the solute ... Calculate the total ionic molality of a solution of 50.0 grams of aluminum.
Explanation:
Answer:
The sodium nitrate is more economical
Explanation:
Hi, to compare this two options you need to determine the amount of nitrogen per 100 lb of both and then estimate its cost:
1) Sodium nitrate ![NaNO_3](https://tex.z-dn.net/?f=NaNO_3)
This fertilizer has 30 % by weight of sodium nitrate:
![m=100 lb * 0.3= 30 lb=13.6 kg](https://tex.z-dn.net/?f=%20m%3D100%20lb%20%2A%200.3%3D%2030%20lb%3D13.6%20kg)
The molecular weight of sodium nitrate:
So, this salt has 14 g of N per 85 g:
![m_N=13600g*\frac{14g N}{85 g}=2240 g N](https://tex.z-dn.net/?f=m_N%3D13600g%2A%5Cfrac%7B14g%20N%7D%7B85%20g%7D%3D2240%20g%20N)
Cost per gram:
![C=\frac{9}{2240g}=0.004](https://tex.z-dn.net/?f=C%3D%5Cfrac%7B9%7D%7B2240g%7D%3D0.004)
2) Ammonium sulfate ![NH_4SO_4](https://tex.z-dn.net/?f=NH_4SO_4)
This fertilizer has 20 % by weight of ammonium sulfate:
![m=100 lb * 0.2= 20 lb=9.07 kg](https://tex.z-dn.net/?f=%20m%3D100%20lb%20%2A%200.2%3D%2020%20lb%3D9.07%20kg)
The molecular weight of ammonium sulfate:
So, this salt has 14 g of N per 114 g:
![m_N=9070g*\frac{14g N}{114 g}=1113.8g N](https://tex.z-dn.net/?f=m_N%3D9070g%2A%5Cfrac%7B14g%20N%7D%7B114%20g%7D%3D1113.8g%20N)
Cost per gram:
![C=\frac{8.1}{1113.8g}=0.007](https://tex.z-dn.net/?f=C%3D%5Cfrac%7B8.1%7D%7B1113.8g%7D%3D0.007)
Based on N:Z ratio, Zr-85 is expected to decay by positron emission. Zr-95 is expected to emit beta particles in a beta decay.
The N:Z ratio determines the stability of a nucleus. If a nucleus has N:Z ratio >1.5 or <1.0, such a nucleus is unstable and will undergo radioactive decay. The aim of such a decay is to attain a favorable N:Z ratio.
For Zr -85, the N:Z ratio is 1.1 while the N:Z ratio of Zr-95 is 1.4. Zr -85 is expected to decay by positron emission which increases the N:Z ratio. For Zr-95, the nucleus tends to undergo processes that decrease the N:Z ratio such as beta emission.
Learn more: brainly.com/question/2192784
Cocaine selectively blocks sodium channels which is the mechanism that leads to local anesthetic effects.
Voltage gated sodium channels play very important roles in the body as they are responsible for action initiation and propagation in excitable cells, such as nerves, muscles and neuroendocrine cells. Like other sodium ion channels blockers such as lidocaine, Cocaine selectively blocks sodium ion channels which denies entry of sodium ions in the cell, thus leading to local anesthetic effects.
The balanced equation is 2H2 + O2 –> 2 H2O. It takes two hydrogen atoms for every oxygen atom to produce this reaction, so the mole ratio between hydrogen and oxygen is 2:1
Answer is 2:1