Chemistry homework helppp

hevi_g

i am stuck on a question on chemsheets about moles and avogadro constant. please could someone help it’s urgent!!

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sorry idk why it attach two photos but it’s question 6

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5hyl33n

Volunteer Team, Clearing and Applications Advisor

Original post by hevi_g

i am stuck on a question on chemsheets about moles and avogadro constant. please could someone help it’s urgent!!

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Question 6

a) Calculate the mass of a ¹H atom.

Step 1:
Find out how many protons, neutrons and electrons there are in a ¹H atom.

Step 2:
Find the total mass of the protons, electrons and neutrons.

E.G. If there are 2 protons, 1 electron and 3 neutrons, you need to do:
(2 x 1.6726 x 10^-24) + (9.1094 x 10^-28) + (3 x 1.6749 x 10^-24)

THIS IS NOT THE CORRECT ANSWER.

b) Calculate the mass of a ¹H⁺ ion.

Step 1:
Find out how many protons, neutrons and electrons there are in a ¹H⁺ ion.

Step 2:
Find the total mass of the protons, electrons and neutrons.

E.G. If there are 2 protons, 1 electron and 3 neutrons, you need to do:
(2 x 1.6726 x 10^-24) + (9.1094 x 10^-28) + (3 x 1.6749 x 10^-24)

THIS IS NOT THE CORRECT ANSWER.

c) Calculate the mass of one mole of ³H atoms.

Step 1:
Find out how many protons, neutrons and electrons there are in a ³H atom.

Step 2:
Find the total mass of the protons, electrons and neutrons.

E.G. If there are 2 protons, 1 electron and 3 neutrons, you need to do:
(2 x 1.6726 x 10^-24) + (9.1094 x 10^-28) + (3 x 1.6749 x 10^-24)

THIS IS NOT THE CORRECT ANSWER.

Step 3:
Multiply your answer from step 2 by Avogadro's constant to calculate the mass of one mole.