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ololo11 [35]
3 years ago
7

According to most scientists, what is the ultimate cause of most mass extinctions? a) Overhunting B) The evolution of new specie

s to replace old ones C) Major changes in the environment D) Asteroid impacts
Chemistry
1 answer:
Alenkinab [10]3 years ago
8 0

Answer:

Answer is D

Explanation:

asteroid inpacts

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The heaviest commonly used United States coin is the half dollar, which has a mass of 11.340g. The lightest United States coin i
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13.6×10^3

Explanation:

11.340+2.268= 13.608

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What elements make up molecules make up molecules of sugar
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C12H22O11 aka carbon, hydrogen, and oxygen
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How many half-lives will pass by the time 1.56% of I-131 is present? B. Approximately how many days does that equal? *
serg [7]

Answer: Hmmmmm that's crazy....

There are a couple of equations one could use for this type of problem, but I find the following to be the easiest to use and to understand.

Fraction remaining (FR) = 0.5n

n = number of half lives that have elapsed

In this problem, we need to find n and are given the FR, which is 1.56% or 0.0156 (as a fraction).

0.0156 = 0.5n

log 0.0156 = n log 0.5

-1.81 = -0.301 n

n = 6.0 half lives have elapsed

Explanation:

Just wanted to help. Hopefully it's correct wouldn't want to waster your time ;)

6 0
2 years ago
Calculate the wavelength of a photon of light having a frequency of 3.50 x 1015 Hz. A. 1.05 x 1024 m B. 1.33 x 1016 m C. 8.57 x
Ann [662]

Answer:

1.17x107m

Explanation:

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3 years ago
An average quality lawn captures ______ times the carbon output of a typical gasoline-powered mower
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An average quality lawn captures 4 times the carbon output of a typical gasoline-powered mower.
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3 years ago
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