Answer:
The answer to your question is: V1 = 27.8 ml of HCl 18 M
Explanation:
Data
HCl = [18M]
HCl Vol = ?
HCl = [ 2M]
HCl vol = 250 ml
Formula
V₁ C₁ = V₂ C₂
V₁ = V₂ C₂ / C₁
Process (substitution)
V₁ = (250)(2) / 18
V₁ = 500 / 18
V1 = 27.8 ml
<span>it is 3/6 = 0.5 mol/kg of solvent i.e. 0.5 molal <span>solution</span></span>
Answer: The number 4 indicates 4 electrons.
Explanation: We are given an electronic configuration, which is:
Here,
- The letters denote the sub-shells of an element.
- The numbers written before the letters which are 1, 2 and 2 represents the Principle Quantum Number and these represents the energy level of the sub-shells.
- The number which are written in the superscripts which are 2, 2 and 4 denotes the electrons which are present in the sub-shell.
Hence, 4 indicates 4 electrons present in 2p sub-shell.
Answer:
Water (H2O) is polar due to the bent shape of the molecule. The shape means most of the negative charge from the oxygen is one one side of the molecule and the positive charge of the hydrogen atoms is on the other side of the molecule. This is an example of polar covalent chemical bonding.
Hope this helps!
Answer:
No
Explanation:
The same amount of matter is present before and after chemical and physical changes. Matter cannot be created or destroyed
