arellanomonika00 arellanomonika00

04-05-2024
Chemistry

Answered

a 840.3 ng sample of an unknown radioactive substance was placed in storage and its mass measured periodically. After 47 days the amount of radioactive substance had decreased to 1-5.0ng. How many half-lives of the unknown radioactive substance have occured?

Answer :

Other Questions

Discuss the organization of the elements on the Periodic Table and theproperties the elements in each period share.type hereChekSUBMIT

Correct to 2 significant figures, the area of a rectangle is 470 cm².Correct to 2 significant figures, the length of the rectangle is 23 cm.Calculate the upper

during a yearly stockcake an apperntice xhwf counts

Which situation most likely results when the government raises interest ratesto banks?OA. More people invest in the stock market.OB. The value of the currency i

Please help due 2night The measure of each interior angle in Polygon A equals the measure of an exterior angle of a regular hexagon. Find n, the number of sides

Select the correct answer. Which sentence best describes the relevancy of the evidence Gibson provides in paragraph 4? A. The evidence is not relevant because i

Is Today there are less children in our class correct?

Give one example of uniform acceleration .

can someone help me with part c on this question - i’ve done it but when i was marking it i wasn’t sure whether i would get a mark or not? i’ve attached the que

where are you allowed to wash hands

What day did Lewis and Clark leave Fort Mandan. I know it's between February and March of 1805 but I need to know the exact date.

The perimiter of a rectangle is 46cm. The area is 90cm2. What are the lengths of the rectangles sides.

Smith drives his car and covers 450 miles in 10 hours. At the same speed, how many hours will it take to cover 540 miles? Plz help

Can a person be exposed to HIV by hugging or shaking hands with an infected person?

Can 21/44 be simplified

What are the similarities and differences between light and sound waves?

do the 10 commandments exist in the baptist church

explain how federalism makes government more democratic and more responsive to the people.

What does "Say "I can" or say" I can't", and you're right either way." mean??

What caused the fall of Rome?