Answer:
It makes proteins ....................
Answer:
its the 4th one (group 18 )
Answer:
Moles= 10.55*10^29ǜ.02*10^23
=1.75*10^6 moles
Moles= mass/molar mass
1.75*10^6=mass/ 183
Mass= 320*10^6 g
The pH of the solution is obtained to be 9.67.
<h3>What is a buffer?</h3>
A buffer is a solution that serves to militate against changes in acidity or alkalinity. The buffer is often made of a solution of a strong acid and its salt or a weak base and its salt.
Now we have the that;
Number of moles of base = 250 /1000 * 0.80 = 0.2 moles
Number of moles of salt = 150/1000 * 0.50 = 0.075 moles
Total volume of the solution = 250 + 150 = 400 mL or 0.4 L
Molarity of the base = 0.2 moles/0.4 L = 0.5 M
Molarity of the salt = 0.075 moles/ 0.4 L = 0.1875 M
pKb = - log( 1.8 x 10^-5) = 4.74
pOH = pKb + log [salt/base]
pOH = 4.74 + log (0.1875/ 0.5)
pOH = 4.33
pH = 14 - 4.33
pH = 9.67
The pH of the solution is obtained to be 9.67.
Learn more about pH:brainly.com/question/15289741
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We are asked how many times would 1 mole of twinkies travel to pluto and back.
We are given that:
1 twinkie = 9.4 cm
Distance from sun to pluto = 5,900,000,000 km
We know that:
1 km = 100000 cm
1 mole = 6.02x10^23 atoms
therefore 1 twinkie = 9.4 cm = 9.4x10^-5 km
If 1 twinkle is 9.4x10^-5 km long and travels 5,900,000,000 km
You multiply the distance of twinkle by the distance from sun to pluto.
So:
9.4x10^-5 km x 6.02x10^23 x 5,900,000,000 = 3.339x10^29 times.
So 1 twinkle will travel 554600 times from the sun to pluto. Times this amount by 2 to get how many times it will travel to pluto and back.
3.339x10^29 x 2 = 6.677x10^29 times
Therefore 1 mole of twinkies will travel to pluto and back 6.677x10^29 times