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The density of the metal is 7.11 g/mL.
<h3>What is the density of the metal?</h3>
The term density of the metal is defined as the ratio of the mass to the volume of the metal. The volume of the metal was obtained by the displacement method. The volume of water that was displaced is the volume of the metal.
Hence;
Mass of the metal= 56.188g - 1.429g = 54.759 g
Volume of the metal = 33.6mL - 26mL = 7.70 mL
Density of the metal = 54.759 g/ 7.70 mL
= 7.11 g/mL
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The answer is number 4 (Chlorine becomes an anion by gaining an electron from sodium). This occurs because Sodium (Na) is a group 1 element, it does not have a high electronegativity. However, Chlorine, a halogen, has a high electronegativity, taking the electron from Sodium, forming an Ionic Bond.
Answer:
C. The enthalpy of a reaction is the sum of the enthalpies of intermediate reactions.
Explanation:
The heat of any reaction ΔH∘f for a specific reaction is equal to the sum of the heats of reaction for any set of reactions which in sum are equivalent to the overall reaction.
Answer:
t = 37.1 s
Explanation:
The equation for the reaction is given as;
2 N2O5(g) --> 4 NO2 + O2
Initial: 0.110 - -
change: -2x +4x +x
Final: 0.110 - 2x +4x +x
But final = 0.150atm;
0.110 - 2x + 4x + x = 0.150 atm
3x = 0.150 - 0.110
x = 0.0133 atm
Pressure in reactant side;
0.110 - 2x
0.110 - 2 (0.0133) = 0.0834 atm
The integral rate law expression is given as;
ln ( [A] / [Ao] ) = -kt
k = rate constant = 7.48*10^-3*s-1
ln (0.0834/0.11) = (7.48*10^-3) t
upon solving, t = 37.1 s
