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andreev551 [17]
3 years ago
7

What is the equation adheres to the law of conservation of matter

Chemistry
1 answer:
Citrus2011 [14]3 years ago
7 0

Answer:

any equation where it starts with the same number of stuff and ends with the same number of stuff. you cna usually do this by balancing an equation

Explanation:

2Na + S = Na2S

Li + Cl = LiCl

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Carbon dioxide levels in the Earth's atmosphere have been steadily increasing.

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Iodine-131 half life 8.040 how long will it take for a 40 gram sample of iodine-131 to decay to 0.75 grams
otez555 [7]

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See explanation below

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To get this, we need to apply the general expression for half life decay:

N = N₀e(-λt)    (1)

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t: time required to decay

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From the above expression we need λ and t. To get λ we use the following expression:

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And we have the value of half life, so, replacing we have:

λ = 8.04 / ln2 = 11.6

Now, we can replace in (1) and then, solve for t:

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t = -3.9766 / -11.6

<h2>t = 0.34 days</h2><h2></h2>
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