Answer:
42 days
Explanation:
Half life = 8.4 days
Starting mass = 40.0 g
Time = ?
Final Mass = 1/16 * 40 = 2.5 g
First Half life;
Remaining mass = 40 / 2 = 20g
Second Half life;
Remaining mass = 20 / 2 = 10g
Third Half life;
Remaining mass = 10 / 2 = 5g
Fourth Half life;
Remaining mass = 5 / 2 = 2.5g
Time = Number of half lives * Duration of half life = 5 * 8.4 = 42 days
Two compound samples are composed of the same elements but in different proportion, it means the two samples are two different compounds.
Because there are many compound which consist of same elements. for example water and hydrogen peroxide are two different compounds but these compounds consist if same elements, hydrogen and oxygen;
H₂O consist of hydrogen and oxygen and it is water
H₂O₂ also consist of hydrogen and oxygen but it is hydrogen peroxide
So, both are different compounds
Answer:
He
Explanation:
From Graham's law of diffusion, lighter or less dense gas tends to diffuse faster than denser gas amongst the list, He is the lightest gas and so will diffuse faster
Red, Orange, Yellow, Green, Blue, Violet and Indigo