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umka2103 [35]
3 years ago
14

Which one of the following properties is NOT a chemical property? (5 points)

Chemistry
1 answer:
telo118 [61]3 years ago
8 0

Answer:

a

Explanation:

Density is a physical property.

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In Fig C, which pair of electrons is the lone pair?
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bottom right top left fig

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Please Help!
Whitepunk [10]

We can use two equations for this problem.<span>

t1/2 = ln 2 / λ = 0.693 / λ
Where t1/2 is the half-life of the element and λ is decay constant.

20 days = 0.693 / λ 
λ   = 0.693 / 20 days        (1) 

Nt = Nο eΛ(-λt)                (2)

Where Nt is atoms at t time, No is the initial amount of substance, λ is decay constant and t is the time taken.
t = 40 days</span>

<span>No = 200 g

From (1) and (2),
Nt =  200 g eΛ(-(0.693 / 20 days) 40 days)
<span>Nt = 50.01 g</span></span><span>

</span>Hence, 50.01 grams of isotope will remain after 40 days.

<span>
</span>

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I think it is called a loess. Please correct me if I am wrong.

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