0.272 g of Ni(NO3)2 contain 8,9655.10e23 molecules for the anhydrous salt.
It is a salt formed from strong acid and strong base and hence it is neither acidic nor basic.
1 or 2
a lot
7
The number of possible microstates in a system of 3 particles distributed between 2 boxes is 10.
Alpha radiation consists of alpha particles, which are helium nuclei composed of 2 protons and 2 neutrons. Since neutrons do not carry an electrical charge, alpha particles have a net charge of +2, meaning they have 2 electrons.
If a mixture is electrically neutral, for every alpha particle (which has a charge of +2), there must be two beta particles (each with a charge of -1) to balance the charges. So there are two more beta particles than alpha particles in the balloon.
One mole of particles is equal to 6.022 x 1023 of those particles. 2 moles would simply be that number times 2.12.044 * 1023 = 1.2044 x 1024
About 2% of the mass of the drop would be base if it is a 5% solution.
An alpha particle is composed of two protons and two neutrons.
A helium atom consists of 2 protons, 2 electrons and 2 neutrons.
Soil particles that are larger than 2 mm are called gravel.