Answer:
Solid= all together in lines
Gas= floating round everywhere
Liquids = a lot more than gas but not all together like solid
The maximum amount of hydrogen gas that can be prepared is if all the hydrogen from both compounds is released.
The hydrogen in 4.94 g of SrH2 is calculated from the mass ratios between Sr and H
1) H2 in SrH2
Sr atomic mass = 87.62 g/mol
H2 molar mass = 2.02 g/mol
Mass of 1 mol of SrH2 = 87.62 g / mol + 2.02 g/mol = 89.64 g/mol
Ratio of H2 to SrH2 = 2.02 g H2 / 89.64 g SrH2
Proportion: 2.02 g H2 / 89.64 gSrH2 = x / 4.93 g SrH2
=> x = 4.93 g SrH2 * 2.02 g H2 / 89.64 g SrH2 = 0.111 g H2
2) H2 in H2O
2.02 g H2 / 18.02 g H2O * 4.14 g H2O = 0.464 g H2
3) Total mass of hydrogen = 0.111 g + 0.464 g = 0.575 g
Answer: 0.575 g
<u>Answer:</u> The pH of the solution is 1.703
<u>Explanation:</u>
We are given:
Concentration of monochloroacetic acid = 0.31 M
The chemical equation for the dissociation of monochloroacetic acid follows:
<u>Initial:</u> 0.31
<u>At eqllm:</u> 0.31-x x x
The expression of 
for above equation follows:
![K_a=\frac{[H^+][C_2H_2ClO_2^-}}{[HC_2H_2ClO_2]}](https://tex.z-dn.net/?f=K_a%3D%5Cfrac%7B%5BH%5E%2B%5D%5BC_2H_2ClO_2%5E-%7D%7D%7B%5BHC_2H_2ClO_2%5D%7D)
We are given:
Putting values in above equation follows:
Neglecting the negative value of 'x' because concentration cannot be negative.
To calculate the pH of the solution, we use the equation:
![pH=-\log[H^+]](https://tex.z-dn.net/?f=pH%3D-%5Clog%5BH%5E%2B%5D)
Hence, the pH of the solution is 1.703
This is a characteristic of a Thermosetting polymer.
To determine this simply use the coefficients in the balanced equation to relate the moles of oxygen to CO2.
Here it would be 1 : 2.
