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mr_godi [17]
3 years ago
15

1. A window washer does not want to change her position.

Chemistry
1 answer:
Nina [5.8K]3 years ago
7 0
It faces small large balanced and in balanced
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What is the volume of 88 grams of CO2 gas at STP?
I am Lyosha [343]
! mole of CO2 at STP has a volume of 22.4 liters
88 grams = 2 moles 

so the required volume = 2*22.4 = 44.8 liters
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3 years ago
A gecko used its sticky feet to crawl from the bottom of a window to the top of
sp2606 [1]

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8 0
3 years ago
If a substance has a half life of 58 years and starts with 500 g radioactive, how much remains radioactive after 30 years?
Vilka [71]

Answer:

A = 349 g.

Explanation:

Hello there!

In this case, since the radioactive decay kinetic model is based on the first-order kinetics whose integrated rate law is:

A=Ao*exp(-kt)

We can firstly calculate the rate constant given the half-life as shown below:

k=\frac{ln(2)}{t_{1/2}} =\frac{ln(2)}{58year}=0.012year^{-1}

Therefore, we can next plug in the rate constant, elapsed time and initial mass of the radioactive to obtain:

A=500g*exp(-0.012year^{-1} *30year)\\\\A=349g

Regards!

5 0
3 years ago
Why is hydrogen a non metal, usually placed with group I element in the periodic table, even though it does not show a metallic
podryga [215]

because it has ns1 electron configuration like the alkali metals

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