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If C-11 has a half life of 20 minutes and you have 2 grams what will be left in an hour?
Wiki User
∙ 7y ago
0.0015 If I am mistaken, this needs to be edited out. Half life of one hour means that half the material will be left after one hour. Over the next hour half of that amount is left, etc. So over three hours, you would have 1/2 X 1/2 X 1/2, or one eighth of the material left. 1/8 is .125 of the original gram.
Wiki User
∙ 16y ago
Wiki User
∙ 7y agoSince one hour is equal to 3 20-minute periods, you would be left with (1/2)^3 = 1/8 of the original amount.
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If Ra-226 had a f life of 1600 years and you have 20 grams how much will be left in 3200 years?
I will try to make the answer simple for you. Half life is 1600 years. So After 1600 years you have half the mass left. That is 10 grams. After another 1600 years, you will be left with half the mass of 10 grams. That is five grams. So after total 3200 years you will be left with 5 grams of mass of the Ra-226 left with.
Strontium-85 has a half-life of 65.2days if you have 10 grams of strontium-85 how much will be left after 65.2 days?
none
If 500 grams are removed from a container holding 4.5 kilograms how many grams are left?
4000 grams 1 kilogram = 1000 grams 1 gram = 0.001 kilograms
How To change from kilograms to grams?
kilograms= 1,000 grams to make kilograms to grams, move the decimal three spaces to the right. To make grams into kilograms, move the decimal three spaces to the left.
What is the half-life of a radioisotope if 25.0 grams of an original 200gram sample of the isotope remains unchanged after 11.46 days?
Remember that the amount you have left will be cut in half every 50 days. Day 0: 200g Day 50: 100g Day 100: 50g Day 150: 25g Day 200: 12.5g Day 250: 6.25g Day 300: 3.125g Day 350: 1.5625g Day 400: 0.78125g Day 450: 0.390625g Day 500: 0.1953125g Day 550: 0.09765625g Day 600: 0.048828125g So after 600 days you will have about 0.048828125 grams (48.828125 mg) left.
How many minutes have past if it is half past the hour?
30 minutes have past if it's half past the hours. As a side effect 30 minutes is left till the hour ends if it's half past the hour.
How many minuts have past if it is half past the hour?
30 minutes have past if it's half past the hours. As a side effect 30 minutes is left till the hour ends if it's half past the hour.
What is the half-life of a radioisotope if a 40 g sample becomes 10 g after 20 minutes?
10 minutes. APEX ^-^
How many minutes are left in the hour if the time is quarter to the hour?
1 quarter equals 15 minutes so there are 4 quarters in an hour there are 15 minutes left until the hour
If you did .95 minutes in an hour how many more minutes are left?
There are 2.4 minutes left
If a doctor gave you three tablets and told you to take one every half an hour how long would they last?
One hour. You leave the doctor's office at 10:00 and take a pill. In half an hour you take another pill, at 10:30. A half an hour later, at 11:00, you take your third and last pill, one hour after you left the doctor's office.
Is 45 minutes closer to 30 minutes or 1 hour?
45 minutes is closer to 1 hour - as the minutes have already left 30 minutes and are advancing towards 1 hour or 60 min
If Ra-226 had a f life of 1600 years and you have 20 grams how much will be left in 3200 years?
I will try to make the answer simple for you. Half life is 1600 years. So After 1600 years you have half the mass left. That is 10 grams. After another 1600 years, you will be left with half the mass of 10 grams. That is five grams. So after total 3200 years you will be left with 5 grams of mass of the Ra-226 left with.
What is an hour minus forty-five minutes equal?
One hour is equal to 60 minutes so if you take 45 minutes away you are left with 15 minutes.
How do you take 1 hour and 39 minutes from 3 hours and 27 minutes?
Well if you take the hour away you are left with 2 hours and 27 minutes then if you take away 27 minutes you are left with 2 hours and you still need to take away 12 minutes so the answer is 1 hour and 48 minutes.
Why is half life important when choosing relative material for diagnostic and treatment purposes?
Half life referees to the length of time that it takes for 50% of the substance to degrade, to a more stable substance. So lets say you give a patient 100 grams of chemical X that has a half life of 1 hour. So after the 1st hour ½ of the substance would have degraded leaving 50 grams of chemical X in their system. After the 2nd hour 25 grams would be left, after the 3rd hour 12.5 grams…..and so on and so forth till only a very small amount is left in their system. So you don't want to give substances that degrade to quickly (being ineffective) or take to long (potentially poisoning the person) to get out of their systems.
How many hours are in 83 minutes?
In 83 minutes , there is one hour. And left over 23 minutes.
