Answer:
A paper battery can work even if it is folded, cut or rolled up. A Paper battery consists mainly of carbon and paper; it can be used to power pacemakers within the body. A paper battery can be used both as a capacitor and battery. It is an ultra-thin storage device.Oct 10, 2014
Explanation:
Answer:
1.39 × 10²³ molecules of CaCl₂
Explanation:
Given data:
Number of moles of CaCl₂ = 0.23 mol
Number of molecules = ?
Solution:
Avogadro number:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
The number 6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ molecules
0.23 mol × 6.022 × 10²³ molecules / 1mol
1.39 × 10²³ molecules
Answer:
The volume of the container would be 1507 L
Explanation:
These question can be solved in two different ways:
Let's do the short road.
We know that 1 mol of anything at STP conditions occupies 22.4 L
By a rule of three:
1 mol contains 22.4L at STP
Then, 67.3 mol of gas would be contained in (67.3 . 22.4) /1 = 1507.5 L
We assume CO₂ as an Ideal Gas, so we can apply P . V = n . R . T
At STP, T is 273.15K and P = 1 atm. We replace:
1 atm . V = 67.3 mol . 0.082 . 273.15K
V = (67.3 mol . 0.082 . 273.15K) / 1 atm → 1507 L
Answer:Metals are an excellent conductor of electricity and heat because the atoms in the metals form a matrix through which outer electrons can move freely. Instead of orbiting their respective atoms, they form a sea of electrons that surround the positive nuclei of the interacting metal ions.
Explanation:
Answer:
6. this is because atomic mass 11 - atomic number 5 is equal to 6 neutrons.