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gregori [183]
2 years ago
12

Which of the following is a radioisotope used to date rock formations older than 50,000 years old?

Chemistry
2 answers:
Natasha2012 [34]2 years ago
3 0
I'm not so sure but I would say Answer Choice B
Lady_Fox [76]2 years ago
3 0

i am pretty sure its uranium 235

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2 years ago
How many moles of HCl are required to completely neutralize 0.30 moles of Ca(OH)2?
hammer [34]
Each mole of Ca(OH)₂ will produce 2 moles of OH- ions

Each mole of OH- ions will require one mole of H+ ions

Thus,
moles of OH- ions = moles of H+ ions = 2 x 0.3
moles of H+ ions required = 0.6

Each mole of HCl will produce one mole of H+ ions
Moles of HCl = moles of H+ ions
Moles of HCl = 0.6
3 0
3 years ago
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How is stoicheometry used to <br>keep camels alive​
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3 years ago
The mass number of an atom can be calculated from the
11111nata11111 [884]

Mass number (A) =protons (p+) + neutrons(n°)

8 0
2 years ago
Phenolphthalein indicator is??
Aleonysh [2.5K]

Answer:

Hey mate.....

Explanation:

This is ur answer.....

<em>Phenolphthalein is often used as an indicator in acid–base titrations. For this application, it turns colorless in acidic solutions and pink in basic solutions. It belongs to the class of dyes known as phthalein dyes.</em>

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