ecolongarcia10p8ckjp ecolongarcia10p8ckjp

17-09-2020
Chemistry

contestada

Rn-222 has a half-life of 3.82 days. If 25.0 g of Radon-22 was originally present, approximately how many grams would be left after 15 days?

Respuesta :

riapotharlanka riapotharlanka

17-09-2020

Answer:

Approximately 0.39 g or 0.4 g if you're rounding up

Explanation:

15/3.82 = 3.92

Let's round that up to 4

That means 15 days is around 4 half lives

4 half lives means 1/16 of the original mass will be left

25/16 = 0.390625

Answer Link

Otras preguntas

Can someone help me please

Angela works as an accountant in a US-based law firm. She has calculated that her business’s tax liability for the previous financial year is $78,200. What is t

Find the limit.....[tex] \displaystyle{ \lim _{x \to5} \frac{ {x}^{2} - 5}{ {x}^{2} + x - 30 } }[/tex]

If A is the reference angle of AMN, which side is opposite A?

History about computer

Pls help. Medium of exchange are helpful for societies because they:

Which sentence is punctuated correctly? A. Of all his friends—Jack, Mia, Louis, (Jack) was the only one he had known since kindergarten. B. Of all his frien

Why is the reduction of chromosomes an important part of meiosis? Answer : To make sure members of a species can produce viable offspring

Which of the following best describes how humans affect the nitrogen cycle? Burning fossil fuels Using fertilizers to increase growth of farm crops Planting tre

the length of a rectangle is 2cm longer than twice its width. find the dimensions of the rectangle if its area is 24cm^2