How many grams are in .705 moles of Cr?
2 answers:
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Answer : The ages of the brother and sister are, 10 and 16 years respectively.
Solution :
Let the age of brother be 'x' and the age of sister be 'y'
There are two equations formed which are,
x + y = 26 ..........(1)
3y - 4x = 8 ..........(2)
First we have to multiple equation (1) by 4 and then added equation (1) and (2), we get the value of 'y'.
Now put the value of 'y' in equation (2), we get the value of 'x'
3(16) - 4x = 8
4x = 40
x = 10
The age of brother = x = 10 years
The age of sister = y = 16 years
Therefore, the ages of the brother and sister are, 10 and 16 years respectively.
Hello!
To calculate the household concentration of NaOH we need to use the dilution formula, clearing for M2, as you can see in the equation below:
Now, we input the values from the data we have onto this equation. M1=19,1 M; V1=10 mL; V2=400 mL, and solve the equation to get the result:
So, the household concentration of NaOH will be 0,48 M
Have a nice day!
To calculate the household concentration of NaOH we need to use the dilution formula, clearing for M2, as you can see in the equation below:
Now, we input the values from the data we have onto this equation. M1=19,1 M; V1=10 mL; V2=400 mL, and solve the equation to get the result:
So, the household concentration of NaOH will be 0,48 M
Have a nice day!