Answer:25,06 kJ of energy must be added to a 75 g block of ice.
ΔHfusion(H₂O) = 6,01 kJ/mol.
T(H₂O) = 0°C.
m(H₂O) = 75 g.
n(H₂O) = m(H₂O) ÷ M(H₂O).
n(H₂O) = 75 g ÷ 18 g/mol.
n(H₂O) = 4,17 mol.
Q = ΔHfusion(H₂O) · n(H₂O)
Q = 6,01 kJ/mol · 4,17 mol
Q = 25,06 kJ.
Explanation:
This change in pressure is caused by changes in air density, and air density is related to temperature.
3 and 4 because the other two answers are different species.
Hello.
Alkali metals are the most reactive group in the periodic table, not to be confused with Alkaline earth metals.
Also, Methane is a gas, not a group on the periodic table.
they contain triple bond, one sigma bond and 2 pi bonds. Pi bonds are weak and easily broken making the compound active.
<span>Chemical reaction is the process of breaking down bonds in reactants and forming new bonds in products. </span>
<span>In Alkynes breaking down bonds is easier so they are more active.
Have a nice day
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