Answer : The time passed in days is 28.6 days.
Explanation :
Half-life = 14.3 days
First we have to calculate the rate constant, we use the formula :
Now we have to calculate the time passed.
Expression for rate law for first order kinetics is given by:
where,
k = rate constant =
t = time passed by the sample = ?
a = let initial amount of the reactant = 100 g
a - x = amount left after decay process = 100 - 75.0 = 25.0 g
Now put all the given values in above equation, we get
Therefore, the time passed in days is 28.6 days.
Answer: Option C.
The waste from these plants is safe, and its storage and disposal are simple
Explanation:
Nuclear power plants produce waste when producing electricity and these waste are not really harmful as you think, they are stored well before disposing appropriately.
Once the waste is removed the reactor, the wastes are cool down in storage pool, they are moved to dry caske which is a concrete storage and stores it for a long time and can be dispose until the site is available for it.
Answer:
Compound
Explanation:
We want to know if it's a compound or a mixture.
An example of a mixture is salt water: you can heat it hot enough to boil off the water, leaving only the salt. This is a physical change, which is how you know it's a mixture.
Something like gold is a compound: if you heat it, or hit it, you'll still only have gold. You can only break it down by chemical means, which is how you know it's a compound.
It is graphical representation of the solubity of a particular solute in a given solvent with respect to varying temperatures,generally,temperature is directly porportional to solubity,as temperature increases solubity increases.