Answer:
- Absorbance of sample solution = 1.21
- Absorbance of reagent blank = 0.205
Explanation:
In order to solve this problem we need to keep in mind the <em>Lambert-Beer law</em>, which states:
Where ε is the molar absorption coefficient, b is the length of the cuvette, and C is the concentration.
By looking at the equation above we can see that if ε and C are constant; and b is 5 times higher (5.00 cm vs 1.00 cm) then the absorbance will be 5 times higher as well:
- Absorbance of sample solution = 0.242 * 5 = 1.21
- Absorbance of reagent blank = 0.041 * 5 = 0.205
Answer: 3.94 atm
Explanation:
Given that,
Initial pressure (P1) = 3.80atm
Initial temperature (T1) = 25°C
since the standard unit of temperature is Kelvin, convert 25°C to Kelvin
(25°C + 273= 298K)
Final pressure P2 = ?
Final temperature T2 = 36°C
(36°C + 273= 309K)
Since pressure and temperature are given while volume is held constant, apply the formula for Pressure's law
P1/T1 = P2/T2
3.80 atm / 298K = P2 / 309K
To get the value of P2, cross multiply
3.80 atm x 309K = P2 x 298K
1174.2 atm•K = 298K•P2
Divide both sides by 298K
1174.2 atm•K/298K = 298K•P2/298K
3.94 atm = P2
Thus, the final pressure is 3.94 atm
The unequal sharing of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near itshydrogen atoms. When a neutral molecule has a positive area at one end and a negative area at the other, it is a polar molecule.
Answer
B salt this is beacause salt is made of monomers
Hey there!
D = m / V
13.6 = 76.2 / V
V = 76.2 / 13.6
V = 5.602 mL
