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devlian [24]
4 years ago
6

Positrons:

Chemistry
2 answers:
yarga [219]4 years ago
7 0

Answer:

D. all of the above

Explanation:

Whitepunk [10]4 years ago
6 0

Answer:

all the above

Explanation:

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Fittoniya [83]
The second one is, "<span>Be careful to present only objective facts"</span>
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what is the total ionic and net ionic equation for for the reaction between between mercury (II) nitrate and iron (III) chloride
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Explanation:

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4 0
3 years ago
A geological sample is found to have a Pb-206/U-238 mass ratio of 0.337/1.00. Assuming there was no Pb-206 present when the samp
azamat

Answer:

Age=2.52*10^9 years

Explanation:

To determine the age, we need to know how much U have become Pb, so first we have to calculate the Pb moles present in a sample:

n_{Pb}=\frac{0.337g}{206g/mol}=0.00164 mol

n_{U}=\frac{1 g}{238g/mol}=0.0042 mol

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P=\frac{0.00164}{0.00164+0.0042}=0.28

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4 0
4 years ago
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If a basketball travels a distance of 4 meters in 5 seconds, what is its average speed?
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i think d

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