how many moles of estradiol (mw = 272) are there in 2 ml of a 100 μm solution
n= c×v
= (100×10^_6)(0.002L)
=200000
To calculate the number of moles of estradiol in 2 ml of a 100 μm solution, we need to use the formula:
moles = (concentration (mol/L) * volume (L)) / molecular weight (g/mol)
First, we need to convert the concentration from micromolar (μm) to molar (mol/L):
100 μm = 100 * 10^(-6) mol/L = 0.0001 mol/L
Next, we convert the volume from milliliters (ml) to liters (L):
2 ml = 2 * 10^(-3) L
Now we can substitute the values into the formula to calculate the number of moles:
moles = (0.0001 mol/L * 2 * 10^(-3) L) / 272 g/mol
moles = 0.00000074 moles
Therefore, there are approximately 0.00000074 moles of estradiol in 2 ml of a 100 μm solution.
To determine the number of moles of estradiol in a given solution, you need to use the formula:
Number of moles = (concentration in Molarity) x (volume in liters)
Here, the concentration is given as 100 μm (micromolar) and the volume is 2 ml. However, you need to convert the volume to liters before using the formula. To do that, divide the volume in ml by 1000.
Volume in liters = 2 ml / 1000 = 0.002 L
Now, plug the values into the formula:
Number of moles = (100 μm) x (0.002 L)
Next, we need to convert micromolar (μm) to molar (M). Since 1 μm is equal to 1x10^(-6) M, we can rewrite the concentration as:
100 μm = 100 × 10^(-6) M
Now, let's calculate the number of moles:
Number of moles = (100 × 10^(-6) M) x (0.002 L)
Number of moles = 2 × 10^(-5) moles
Therefore, there are 2 × 10^(-5) moles of estradiol in 2 ml of a 100 μm solution.