Answer:
0.0890 M
Explanation:
Since the concentration of KCl is irrelevant in this case, the concentration of Na2S2O3 can be determined using a simple dilution equation:
C1V1 = C2V2, where C1 = 0.149 M, V1 = 150 mL, V2 = 250 mL
C2 = 0.149 x 150/250
= 0.089 M
To determine the concentration of S2O32- (aq), consider the equation:
The concentration of Na2S2O3 and S2O32- (aq) is 1:1
Hence, the concentration in molarity of S2O32- (aq) is 0.089 M.
To 3 significant figures = 0.0890 M
Percent Composition by Mass. Percent composition is calculated from a molecular formula by dividing the mass of a single element in one mole of a compound by the mass of one mole of the entire compound. This value is presented as a percentage.
The best answer. :)
The Standard Temperature and Pressure is 1 atm, 273 K
<u>Explanation:</u>
STP is Standard Temperature and Pressure
- Standard temperature is characterized as zero degrees Celsius (0°C), or 273.15 degrees Kelvin (273.15 K). This is the point of solidification of water at sea level, in the air at standard pressure.
Standard Temperature is
0° C in Celsius or 273 K in Kelvin
- Standard Pressure is 1 Atm, 101.3kPa or 760 mmHg or torr. STP is the "standard" condition regularly utilized for estimating gas density and volume.
Standard Pressure is
1 Atmosphere (atm)
760 Torricelli's (torr)
760 Millimeters of Mercury (mmHg)
101.325 KiloPascals (kPa)
C, the graph shifts to the right due to 9 being subtracted and compresses due to the fraction 1/6.