Answer:
100 mL volumetric flask.
Explanation:
For preparation of any solution we generally use volumetric flask.
We will weigh the required amount of NaCl (based on calculation for 100 mL of 0.422 M NaCl) and will add this in a 100 mL volumetric flask.
There is only one mark in the volumetric flask.
So we will start adding water to it through wash bottle.
Then will continue stirring the solution to dissolve NaCl with addition of more amount of water (use funnel to add water).
Then finally we will make up the solution to 100 mL of mark.
Osmotic pressure can be calculated using the following equation:
Here,
C representated concentration
R represented gas constant
T represented temperature
representated osmotic pressure
R=0.0821 atm L mol ⁻¹
T = 25 + 273 = 298 K
C=
Given mass of the substance= 6.00 g
Volume= 1 L
=0.75 atm
Putting all the values in the equation:
Molar mass of the substance= 195 g mol⁻¹.
The element that has been reduced in the chemical equation is .
The given reaction has been:
The reaction has been the redox reaction, in which the one of the reactant has been oxidized, and the other has been reduced in the chemical reaction.
<h3>Reduction in the reaction</h3>
The reduction has been defined as the gain of electrons. In the given reaction, the Mg loses 2 electrons and has been converted to the Mg ion.
Thus, Mg has been oxidized in the reaction.
The Cl has been present as the diatomic molecule and with the gain of two electrons from the Mg it has been converted to two chloride ions.
Thus, the element that has been reduced in the chemical equation is .
Learn more about reduction, here:
brainly.com/question/14698511
Answer:
0.054 moles of carbon dioxide will be produced
Explanation:
Step 1: Data given
Number of moles oxygen = 0.085 moles
Step 2: The balanced equation
2C8H18 + 25O2 → 16CO2 + 18H2O
Step 3: Calculate moles of carbon dioxide
For 2 moles octane we need 25 moles oxygen gas to produce 16 moles carbon dioxide gas and 18 moles water vapor
0.0544
For 0.085 moles O2 we'll have 16/25 * 0.085 = 0.054 moles CO2
0.054 moles of carbon dioxide will be produced