Answer: a) : anode
b. : cathode
c. : anode
Explanation:
Electrochemical cell is a device which converts chemical energy into electrical energy. It consist of two electrodes, anode and cathode.
Oxidation i.e. loss of electrons , which results in an increase in oxidation number occurs over anode.
Reduction i.e. gain of electrons, which results in decrease in oxidation number occurs over cathode.
a. : oxidation : anode
b. : reduction : cathode
c. : oxidation : anode
The number of atoms in a molecule varies depending on the specific molecule formed. As a rule of thumb, a molecule must be composed of at least two atoms with no maximum amount of atoms as long as all the atoms in the molecule are bonded together somehow.
Answer:
definite volume. indefinite shape
Answer:
The missouri River is a Longesr tributary of the Mississippi River.
Answer:
Explanation:
<u>1. Molar masses of the two compounds</u>
i) Vitamin C:
Formula: C₆H₈O₆
ii) Sucralose
<u>2. Molarity of the solution:</u>
The osmotic pressure is a colligative property which can be calculated using the following equation:
Where:
- Π is osmotic pressure (atm) = 3.04 atm
- M is the molar concentration of dissolved species (mol/L).
- R is the ideal gas constant = 0.08206 L-atm/mol- K
- T is the temperature (Kelvin) = 295 K
You can solve for M:
<u>3. Number of moles</u>
You can calculate the number of moles of the dissolved species using the formula:
<u>3. Equation to find moles of each compound</u>
Number of moles of each compound:
i) Vitamin C
Let x be the mass in grams of vitamin C in the 1.124g sample. Then, 1.124g - x is the mass of sucralose.
- Number of moles = mass in grams / molar mass
- Number of moles = x / 176.13 g/mol = x / 176.13
ii) Sucralose
- Number of moles = (1.124g - x) / 397.64 g/mol = (1.124 - x / 397.64)
iii) Total moles equation:
Then,
And the mass percent of vitamin C and sucralose are: