Answer:
The first number is 138.
Step-by-step explanation:
Let the first number be <em>x.</em>
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Then since they are consecutive numbers, the second number will be (<em>x</em> + 1), the third (<em>x</em> + 2), the fourth (<em>x</em> + 3) and the fifth being (<em>x</em> + 4).
We are given that their sum is 700. Therefore:
Solve for <em>x</em>. Combine like terms:
Subtract 10 from both sides:
Divide both sides by five. Therefore:
The first number is 138.
Answer:
A = 0.84
Step-by-step explanation:
The absorbance of the myoglobin solution can be calculated by using the Beer-Lambert law:
<u>Where:</u>
<em>A: is the absorbance </em>
<em>ε: is the molar attenuation coefficient = 15,000 M⁻¹cm⁻¹ </em>
<em>l: is the optical path length = 1 cm</em>
<em>C: is the concentration = 1 mg/ml </em>
Since the concentration is given in mg/ml and the molar attenuation coefficient is given in M (mol/L) we need to convert the concentration in mg/ml to mol/L and for that, we need to use the molecular weight of myoglobin = 17.8 kDa = 17.8x10³ g/mol:
Now, we can calculate the absorbance of the myoglobin:
Therefore, the absorbance of the myoglobin solution is 0.84.
I hope it helps you!