Answer:
4.9 × 10²³ molecules
Explanation:
Given data:
Number of molecules = ?
Number of moles of oxygen = 0.815 mol
Solution:
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
0.815 mol × 6.022 × 10²³ molecules / 1 mol
4.9 × 10²³ molecules
Mouth ⇒ oesophagus ⇒ Stomach ⇒ small intestine ⇒ large intestine ⇒ rectum ⇒ anus.
Note: the liver produces bile which neutralises the acidity of hydrochloric acid in the stomach, but food does not go through the liver. Moreover, the pancreas is a major part in enzyme production, but food does not pass through the pancreas either.
The question is incomplete, the complete question is shown in the image attached to this answer
Answer:
Most similar - sulphur
least similar- gallium
Explanation:
The compound formed when hydrogen reacts with oxygen is water. The chemical formula of water is H2O.
Water is very similar to H2S which is the compound formed when hydrogen reacts with sulphur. The bonds in water and H2S are both polar covalent bonds.
However, gallium is a metal and its hydride (GaH3) is least similar to water.
The correct answers are B, C and E. Explanation: Centripetal force: It is the force which is required to keep the body in
