Temporary hardness can be dealt with using boiling water(Calcium hydrogen carbonate) but Permanent won't so you need to use washing soda instead(sodium carbonate) or Ion exchange resin
Answer:
The sample of 50 mg decay to 10 mg in 377.7 time.
Explanation:
Given that:- The exponential decay model for the decay after t days as:-
Where,
is the concentration at time t
is the initial concentration
Given:
= 50 mg
= 10 mg
So,
<u>The sample of 50 mg decay to 10 mg in 377.7 time.</u>
9
To balance the equation, there must be an equal number of Xs and Ys on each side. Since on the left side there are 2 Ys, and on the right side there are 3, you must put a coefficient of 3 on the left and 2 on the right to get the least common multiple of 6. Since putting 2 as the coefficient on the product makes a total of 4 Xs on the right, you must have a coefficient of 4 on the X product.
Thus, 4 + 3 + 2 = 9.
Polonium<span>The half-life for these elements is measured in mere minutes! Contrast this with the half-life of polonium, which is 138.39 days. According to the Periodic Table of Radioactivity, at this time the most radioactive element known to man is element number 118, which has the placeholder name Ununoctium.</span>