Hello there!
<span> Use Avogadro's number, 1 mol = 6.02 x 10^23 atoms.
</span>Convert atoms to moles and you get:
<span>9.97x10^(-15) moles Co
</span>
Hope This Helps You!
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They use information from other things that relate to that topic and then use that to do their research
Ca(OH)2
Make sure your charges are balanced when you write the compound. Ca has a +2 charge and OH has a -1 charge so you need 2 of OH.
Answer:
5 ppb of Cd
Explanation:
Given , Concentration = 0.0050 mg/L
To find this concentration in parts per billion
As,
1 mg per liter = 1 ppm
Parts per billion is defined as the number of the units of the mass of contaminant per thousand million units of the total mass. The relation between ppm and ppb is shown below as:
1 ppm = 1000 ppb
Concluding as:
1 mg per liter = 1000 ppb
So,
0.0050 mg/L = 1000 × 0.0050 ppb = 5 ppb of Cd