2 years ago

What value was a mole originally based upon?

1 answer:

8 0

I think the correct answer would be the number of atoms in a carbon isotope. This is because before mole was created atomic mass unit was first used to measure molecular stuff. Then, later on mole was created which is based on carbon-12 isotope.

You might be interested in

Write the formulas for the following compounds: (a) rubidium nitrite, (b) potassium sulfide, (c) sodium hydrogen sulfide, (d) ma

choli [55]

Answer:

All are having different valent cation and anion like mono,di and trivalent polyatomic ions .

A. RbNO3

B. K2S

C. NaHS

D. Mg3(PO4)2 formed by divalent Mg+2 and trivalent PO43-

E. CaHPO4

F. PbCO3 , lead is in Pb+2 form

G. SnF2

H. (NH4)2SO4

I. AgClO4

J. BCl3

6 0

2 years ago

Liquids have a(n)____shape and A(n)_____volume.

shusha [124]

B. Indefinite, definite

4 0

2 years ago

Answer question number 2

kipiarov [429]

Answer:

it would be the second choice

3 0

2 years ago

How many numbers does positive atoms have

anastassius [24]

I'm not sure I'm sorry for that but I found this http://www.chem4kids.com/files/atom_ions.html

7 0

2 years ago

Which electron transition represents a gain of energy?

xz_007 [3.2K]

The correct answer is (A) from 2nd to 3rd shell.

The explanation :

when a gain of energy is the shift of the electrons from a shell of low energy to the shell of high energy

and we have here 2nd shell is the shell of low energy, and 3rd shell is the shell of high energy.

∴ (A) from 2nd to 3rd shell is the correct answer.

5 0

2 years ago