Explanation:
The activation energy of a chemical reaction is the amount of energy that must be added to go from the energy level of the reactants to the energy level of transition state.
B: Painting over a metal surface in order to prevent rust is known as
rust proofing and it works by preventing oxygen and water from reaching
the metal surface thus preventing a redox reaction which would result in
rusting.
The mass of silver chloride produced is 24.79g.
Given,
volume = 1.11 L
Molarity = 0.156 M
First, convert molarity to moles by multiplying by the volume:
0.156 M AgNO3 = (0.156 moles AgNO3)/1 L x 1.11 L = 0.173 moles AgNO3
We are only interested in AgCl, not AgNO3. We convert moles of silver nitrate to moles of silver chloride using the balanced equation. This is a 1:1 conversion:
0.173 moles AgNO3 x (1 mole AgCl)/(1 mole AgNO3) = 0.173 moles AgCl
To get mass from moles, we multiply by the molar mass:
0.173 moles AgCl x (143.32 g/mol) = 24.79 g AgCl
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Answer: oxidized
Explanation:
When a glucose molecule loses a hydrogen atom as the result of an oxidation-reduction reaction, the molecule becomes
oxidized.
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To make computations easier, let us assume that there is 1 liter solution of the sample.
So using the density formula to know what the mass of this sample would be:
1 L x 1000 mL / 1L x 1.20g/ 1 mL = 1120g
Now use the percent concentration by mass to know how many grams of HCl you can have:
1120 g sol x 39 g HCl / 100 g = 313.6 g HCL
To determine the solution's molarity, use the molar mass to know the number of moles present:
313.6g x 1 mole / 36.46g = 8.60 moles
since the sample has a volume of 1 L, the molarity is:
C = n / V = 8.60 moles / 1.0 L = 8.60 M
To get the solution's molarity, determine the mass of water.
Msol = Mwater + Macid
Mwater = Msol - Macid = 1120 - 313.6 = 806.4 g
The molarity will be:
b = n/ Mwater = 8.60 moles / 806.4 x 10^-3 = 10.66 molal
the solution's molarity will be equal to its normality since HCl acid can only release one mole of protons per mole of acid
Normality = 8.6 N
