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Kryger [21]
3 years ago
9

What is physical weathering NOT caused by? (pls i really need help with this!!)

Chemistry
1 answer:
Anarel [89]3 years ago
3 0

Answer:

the changing tempure in rocks causing it to back apart

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Some amount of hydrogen peroxide (H2O2) breaks down to produce 3 molecules of oxygen (O2) and 6 molecules of water (H2O). How ma
soldier1979 [14.2K]

Answer:

Atoms_H=12Atoms

Explanation:

Hello,

In this case, the only source of hydrogen is in the 6 molecules of water, therefore, the atoms of hydrogen, by applying stoichiometry with the Avogadro's number is:

Atoms_H=6moleculesH_2O*\frac{1molH_2O}{6.022x10^{23}moleculesH_2O}\frac{2molH}{1molH_2O}*\frac{6.022x10^{23}AtomsH}{1molH} \\Atoms_H=12Atoms

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Nimfa-mama [501]

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After two half-lives, a sample contains 10 grams of parent isotopes. How many grams of the parent isotope were present to start?
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40 grams
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