A chemist performs the following reaction to make sodium nitrate
2 answers:
Answer:
The salt (Sodium Nitrate) is prepared by the reaction of nitric acid and sodium hydroxide. The reaction is also known as neutralization reaction.
Explanation:
The reaction between nitric acid () and sodium hydroxide (NaOH) will result in the formation of salt (Sodium nitrate). The balanced reaction between nitric acid and sodium hydroxide is shown below
is a strong acid and NaOH is a strong base. This reaction is an example of neutralization reaction.
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Answer : 121.5 <span>μCi
Explanation : We have Ce-141 half life given as 32.5 days so if the activity is 3.8 </span><span>μci after 162.5 days of time elapsed we have to find the initial activity.
We can use this formula;
</span>
3.8 /
= 
((0.693 X 162.5 ) / 32.5) = 121.5
<span>
On solving we get, The initial activity as 121.5 </span>μci
Explanation : We have Ce-141 half life given as 32.5 days so if the activity is 3.8 </span><span>μci after 162.5 days of time elapsed we have to find the initial activity.
We can use this formula;
</span>
3.8 /
<span>
On solving we get, The initial activity as 121.5 </span>μci