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1. Weigh 60 g NaOH.
2. Put this NaOH in a 1 L volumetric flask.
3. Add slowly 200 mL distilled water and stir.
4. Put the flask in a thermostat at 20 0C and maintain for 1 hour.
5. Add distilled water up to the mark. Stir vigorously.
6. Standardize the solution by titration with oxalic acid, potassium hydrogen phtalate, etc.
7. Transfer the solution in a bottle and apply a label (date, name of the operator, name of the solution, normality).
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How many protons and neutrons in N-15?
The number after the "N", 15, is the mass number. The mass number is the sum of the number of protons and the number of neutrons. So, if you find a periodic table, you can find the atomic number, which is the same as the number of protons. Because the atomic number of nitrogen is 7, it has 7 protons. Then we take the mass number (protons + neutrons) and subtract the number of protons to find the number of neutrons. 15 - 7 = 8 neutrons in 15N.
What is the normality of isotonic saline 85 percent NaCL?
NaCl (gmw=58g, valence=1) Grams of equivalent weight = 58/1 = 58grams so 1EQ/ 58grams=1 Normality is expressed in Eq/L With 1% defined as 1 gram per 100 ml, 85% is 85 grams per 100 ml (1EQ/58grams) * (85grams/100ml) * (1000ml/L) = 85000eq/5800L = 14.655 or 15N Although I don't think you were supposed to do 85%, for clinical chemistry it should be something more like 0.85% or the solution would be too hypertonic. In which case it would be (1eq/58grams)*(0.85grams/100ml)* (1000ml/L) = 850eq/5800L = 0.14655 or 0.15N FG 9/16/2012
What element has 8 proton 8 neutrons and 10 electrons?
The element that has 9 protons is fluorine. Its atomic number is 9, indicating that the element has 9 protons in the nuclei of its atoms. If there are 10 electrons, then the fluorine atom has gained an electron and is now a negatively charged anion with a charge of 1-.
14N and 15N are isotopes they differ in protons numbers?
The isotope N-14 has 7 neutrons and the isotope N-15 has 8 neutrons.
-5 - 15n equals 10?
-5 -15n = 10add 5 to both sides-15n = 15divide both sides by -15n = -1
What is 15N equals 0?
It's an equation in 'N' ... about the simplest one you could write.The solution of that equation is: N=0 .
How would you factorise 15n - 1?
14
What kind of equation i could use to put 15n and 105 in my equation?
You could do so many. Here are some examples: 15n=105 15n+105=1005 15n-105=270 Hope this is what you were looking for. :) Good luck!
What is n in 15n 10 190?
To figure out what N stands for 15n, 10 and 190 needs to be used in an equation. If the equation was 15n-10=190, you would start by adding 10 to both sides to give you 15n=200. The next step would be to divide both sides by 15 which gives you n=13.33.
What is a continent on 15N latitude?
Bob
What country is 15N and 150W?
hawaii
Eight subtraced fromt he product of fifteen and a number?
The product of 15 and a number (when the number is n) is 15n. Subtract 8 from this and we have 15n-8
What is n if 7 over 9 is equal to 14 over 15 times n?
1.2PARTIAL SOLUTION:7/9 = 14/15n7(15n) = (14)(9)105n = 126n = 1.2
What does 15n and 14 n have in common?
n
What is the answer to the product of triple a number and five?
15n
What is 15N 91W on your world map?
guatemala
