Answer:
Protein Concentration is 2.82mg/L
Explanation:
According to Beer-Lambert's Law, Absorbance is directly proportional to the concentration.
However, the concentration of a solution can be determined from a calibration curve, in which Absorbance is plotted on the y-axis and the Concentration on the x-axis.
Plotting the best line, the equation of line is used
y = mx + c
where y is absorbance = 0.150
m is slope = 0.0163
x is concentration
c is intercept = 0.104
inserting the values from the question
y = mx + c
0.150 = 0.0163x + 0.104
0.0163x = 0.150 - 0.104
0.0163x = 0.046
Divide both sides by 0.0163
0.0163x/0.0163 = 0.046/0.0163
x = 2.82
Concentration of protein = 2.82 mg/L
Answer:
C
Explanation:
Only this choice is applicable and correct.
The inter-molecular forces of attraction between the molecules must have been broken (overcome) before the molecules can gain an increase in the kinetic energies between them.
So your practically trying to finding the molar mass of CaSO₄.2H₂O and that is found by adding all the molar masses of the individual elements:
So Ca = 40 g/mol
S = 32 g/mol
O = 16 /mol
H = 1 g/mol
molar mass of CaSO₄.2H₂O = [(40) + (32) + (16 × 4) + (2 × 1 × 2) + (2 × 16)]
= 172 g/mol
Answer:
NaO
Explanation:
Empirical formula:
It is the simplest formula gives the ratio of atoms of different elements in small whole number
.
Given data:
Percentage of sodium = 59.0%
Percentage of oxygen = 41%
Empirical formula = ?
Solution:
Number of gram atoms of Na = 59.0 / 23 = 2.6
Number of gram atoms of O = 41 / 16 = 2.6
Atomic ratio:
Na : O
2.6/2.6 : 2.6/2.6
1 : 1
Na : O = 1:1
Empirical formula is NaO.
