Answer:
a. 10.54
Explanation:
reaction is
NH₃ + NaOH -----------------NH₄Cl + H₂O
0.10 mol NaOH will consume 0.10 mol NH₃ thereby decreasing the initial amount of moles NH₃ and increasing that of NH₄Cl
mol NH₃ = 0.80 - 010 = .70
mol NH₄Cl = 0.80 + .10 = 0.90
pH = pKₐ + log (( NH₃/NH₄Cl))
pH = 9.26 + log (( 0.90 + 0.70)) = 9.26 + 0.11 = 10.54
Answer:
30100000000000000000 atoms
Explanation:
Ar of Fe : 56
0.028/56 = 0.0005 moles of Fe
0.0005 * 6.02 * 10^23(Avagardro's law of constant)
= 3.01*10^20 atoms
Answer:
V = 36.7L of 
Explanation:
1. Write the chemical reaction for the decomposition of sodium azide:
2. Find the number of moles of produced by the decomposition of 71.4g of 
:
3. Use the ideal gas equation to find the Volume of occupied by 1.65 moles of , at the temperature and pressure given by the problem:
Solving for V:
Converting the temperature from ◦C to K:
25◦C+273.15=298.15K
Replacing values:
V=36.7L of
Answer:
Here, acceleration due to gravity(a) is assumed as 10m/s².We can also take it as 9.8m/s²
Explanation:
Argon is a suitable choice for light bulbs because it is inert. Compared to a reactive gas like oxygen, the metal filimant would burn up in a reactive environment, which is why a noble gas is used.
