Can anyone help me with any of these? If you can even answer any one of these I
ID: 824369 • Letter: C
Question
Can anyone help me with any of these? If you can even answer any one of these I will give you points! Thanks!
34) Consider the following exothermic reaction at equilibrium : CO(g) + H2O(g) H2(g) + CO2(g). What happens to the system when carbon dioxide is removed from the mixture?
Question 34 options:
What happens depends on the initial temperature.
The reaction shifts to the left.
There will be no change in the position of the equilibrium.
The reaction shifts to the right.
24) Saline solutions (NaCl in water) used to deliver intravenous drugs are 0.89%(w/v). What volume of this solution delivers 2.3 g?
Question 24 options:
2.0 mL
360 mL
2.6 mL
260 mL
11) Krypton-85 has a half-life of 10 years. What percentage of 85Kr produced from nuclear testing in 1959 still remains today?
Question 11 options:
25.0%
6.25%
3.13%
12.5%
What happens depends on the initial temperature.
The reaction shifts to the left.
There will be no change in the position of the equilibrium.
The reaction shifts to the right.
24) Saline solutions (NaCl in water) used to deliver intravenous drugs are 0.89%(w/v). What volume of this solution delivers 2.3 g?
Question 24 options:
2.0 mL
360 mL
2.6 mL
260 mL
11) Krypton-85 has a half-life of 10 years. What percentage of 85Kr produced from nuclear testing in 1959 still remains today?
Question 11 options:
25.0%
6.25%
3.13%
12.5%
Explanation / Answer
34. Acc to le chateliars principle decresing conc of product shifts reaction forward.
Thus reaction shifts right, ie towards product.
24. Conc of drug=0.89% w/v,
=0.0089 w/v
which means 0.0089g drug each ml of solution.
Now, for 2.3g drug volume of solution req= 2.3*(1/0.0089)
=258.4
or, 260ml
11. Given Half life, t1/2=10yrs
t1/2=0.693/k
k=0.693/10=0.0693 yrs
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