A flask contains 300 ml of 0.4M NaCl. ¿How many moles of NaCl are in 15ml?
let the number of mole of Nacl in 15ml be x
300ml=0.4M
15ml=x
x=300/(0.4*15)
X=300/6
x=50ml
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A flask contains 300 ml of 0.4M NaCl. ¿How many moles of NaCl are in 15ml?
To calculate the number of moles of NaCl in 15 ml, we need to use the concentration of NaCl in the flask.
Given:
- Volume of NaCl solution = 300 ml
- Concentration of NaCl = 0.4 M
First, we can calculate the number of moles of NaCl in the 300 ml flask.
moles = concentration × volume
moles = 0.4 M × 300 ml
moles = 120 moles
Now, to find the number of moles in 15 ml, we'll use a proportion.
moles in 300 ml moles in 15 ml
----------------- = -----------------
120 moles x
This can be rearranged as:
x = (moles in 15 ml × 300 ml) / 120 moles
Now we'll substitute the values and calculate:
x = (moles in 15 ml × 300 ml) / 120 moles
x = (0.4 M × 15 ml) / 120 moles
Simplifying this equation, we get:
x = 0.005 moles
Therefore, there are 0.005 moles of NaCl in 15 ml of the solution.