Hey there!
A half-life means after a certain amount of time, half of that substance will be gone/changed after that time.
There are 3 half lives in 11.46 days because 11.46 ÷ 3.82 = 3.
So, we divide the 3mg sample in half 3 times.
3 ÷ 2 = 1.5
1.5 ÷ 2 = 0.75
0.75 ÷ 2 = 0.375
There will be 0.375mg of radon-222 remaining after 11.46 days.
Hope this helps!
Answer:
$1,194.59 - Checking
$2,381.47 - Savings
Explanation:
$478.61 + $715.98 = $1,194.59
$3,097.45 - $715.98 = $2,381.47
I am pretty sure that the effect on the volume of 1 mol of an ideal gas is being revelesd by the option : B. The pressure changes from 760 torr to 202 kPa, and the temp. changes from 37degrees C to 155 degrees kelvin. I choose this one because you have to use ideal gas law - V= nRT/P and you will see the doubled pressure in here : <span>760 torr= 1atm and 202kPa = 2 atm.
Do hope it helps! Regards.</span>
Potassium Chloride and sodium chloride is a combination ofmineral supplement that may be helpful in heart prostration