tiffy9066 tiffy9066

03-05-2018
Chemistry

contestada

The half-life of cobalt-60 is 5.20 yr. how many milligrams of a 2.000-mg sample remain after 10.50 years?

Respuesta :

mkryukova19 mkryukova19

03-05-2018

final amount =initial anount *(1/2)^(t/half life)

final amount =2.000 mg *(1/2)^(10.5/5.20) = 0.493 mg remain after 10.5 years

Answer Link

Otras preguntas

Which element has atoms with the greatest attraction for electrons in a chemical bond? (1) beryllium (3) lithium (2) fluorine (4) oxygen

Please find the volume of the object shown. Use 3.14 as pi. Round your answer to the nearest hundredth.

PLEASE HELP ME! In the figure shown, the measure of angle 6 is 141º. What is the measure of angle 5?

What is the sine ratio for ∠F?

Multiply both sides of the each equation in order to get the coefficient to be an integer. 45=1/2a-3

A distance of 1.0 × 10^−2 meter separates successive crests of a periodic wave produced in a shallow tank of water. If a crest passes a point in the tank every

A horizontal 20.-newton force is applied to a 5.0-kilogram box to push it across a rough, horizontal floor at a constant velocity of 3.0 meters per second to th

Archeologists theorize that the social structure of the extended family was imported to hunting and gathering societies because

An 8.0-newton wooden block slides across a horizontal wooden floor at constant velocity. What is the magnitude of the force of kinetic friction between the bloc

The bottom of Onondaga Lake in upstate New York contains large amounts of pollutants. One proposal to clean the lake bottom requires that the pollutants be remo