The reaction that exemplifies a double replacement reaction is as follows: K2S + CoCI2 -> 2KCI + CoS, which is option 1.
<h3>What is a double replacement reaction?</h3>
A double replacement reaction is a type of reaction in which two elements are substituted in the reacting compounds.
In the reaction given as follows:
K2S + CoCI2 -> 2KCI + CoS
- Pottasium replaces cobalt in Cobalt chloride
- Sulfur replaces chlorine in Cobalt chloride
Therefore, the reaction is a type of double replacement reaction.
Learn more about double replacement reaction at: brainly.com/question/19267538
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They make scientific hypothiesis
Missing text find on internet: a<span> 90,0 mL sample of water is heated to its boiling point.
V(H</span>₂O) = 90,0 mL.
d(H₂O) = 1,00 g/mL.
m(H₂O) = 90 mL · 1,00 g/mL.
m(H₂O) = 90 g.
n(H₂O) = m(H₂O) ÷ M(H₂O).
n(H₂O) = 90 g ÷ 18 g/mol.
n(H₂O) = 5 mol.
Q = n(H₂O) · ΔHvap
Q = 5 mol · 40.65 kJ/mol.
Q = 203,250 kJ.
Q - heat reqiured.
Hello There!
Conduction is the transfer of heat from one particle of matter to another.
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Well if it loses one electron, then you would have more protons, so I would assume you would have a positive charge :)