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How many gr in 90 mg?
milligrams (mg) are thousndths of a gram.90mg = 0,090gnine hundredths or ninety thousandths of a gram
The half-life of strontium-90 is 28 years. How long will it take a 76 mg sample to decay to a mass of 19 mg?
After 28 years your sample halves, ie becomes 38 mg. In another 28 years it will have halved again to 19 mg, so your answer is 56 yearsIt may not seem important, but you should remember that your sample is not evaporating. The actual 76 mg sample will still have almost all of its mass after 56 years. But by that time only 19 mg of it will be strontium-90. The rest of the sample will still be there, but it will have become Zirconium-90 which is stable.And thank your teacher for giving you an easy number to work with. The actual half-life is closer to 28.8 years.
Why is driving 90 miles per hour wrong?
it's illegal and dangerous
What kind of pill has MI-45 on it on one side and APO on the other side?
The antidepressant mirtazapine.
What can 10 zanax of 300mg do to you?
Xanax does not come in 300 mg tablets. They come in doses as low as .25 mg, all the way to 2 whole mg. But even 10 Xanax of .25 (1/4 mg) mg would be dangerous for someone who has not been on this med for quite a while, and taking more than that could be fatal to some people.Never, under any circumstances, take more than what is prescribed by your doctor.
