To measure the mass of a given powdered substance do the following:
1. Zero the weighing balance, that is, put the weigh balance at zero mark.
2. Put an empty weighing paper on the balance and take its reading. Record it as X1.
3. Use spatula to put the powder you want to measure on the weighing paper on the balance. Take your reading and record it as X2.
The mass of the powered is X2 - X1.
Answer:
the number of moles is 6
Explanation:
The computation of the number of moles is given below:
According to the question
Since 2 mol of KI produces 1 mol of PbI2
based on the above information
The number of moles would be
8 mol will produce 6 mol of PbI2
Therefore the number of moles is 6
Hence, the same is considered and relevant too
The other things would be ingored
<span>Electron cloud model was the great contribution of 20th centuary
</span><span>In the electron cloud model, the electron cloud is denser in some locations than in others the denser areas represent that the
</span><span>regions where the probability of finding an electron is high
</span>means there is more chance of finding or presence of an electron
so correct option is A
hope it helps
Answer:A
Explanation: because you have to distribute it