Answer:
advantages:
. The error due to weighing the solute can be minimised by using concentrated stock solution that requires large quantities of solute. 2. We can prepare working standards of different concentrations by diluting the stock solution which is more efficient since consistency is maintained
3. Some of the concentrated solutions are more stable and are less likely to support microbial growth than working standards used in the experiments.
Answer:
False
Explanation:
Molecules are not more sizable atoms than the average atom. Molecules are compunds of two different symbolic elements, when you combine then you get a molecule. The answer to your question is false because if they were larger molecules, they would be in object around us but molecules are not in all objects around us.
Answer:
Lewis structure in the attached image.
Explanation:
To draw the Lewis structure of H₂SO₄, we need to consider the octet rule: atoms gain, lose or share electrons to have 8 electrons in their valence shell. Hydrogen is an exception because its valence shell is complete with 2 electrons (duet). H, S and O are nonmetals, so they form covalent bonds to complete their valence shell, that is, they share pairs of electrons.
- S has 6 valence electrons, so it has to share 2 pairs of electrons to reach the octet.
- O has 6 valence electrons, so it has to share 2 pairs of electrons to reach the octet.
- H has 1 valence electron, so it has to share 1 pair of electrons to reach the duet.
In the attached image is the resulting Lewis structure.