Answer:
Lemon juice has lowest pH.
Explanation:
pH is the negative log of hydrogen ion concentration. By increasing the Hydrogen ion concentration pH will decrease.
pH = -log [H⁺]
According to pH scale,
The pH of 7 is consider neutral. The pH below the 7 is consider acidic and above the 7 is basic.
The sodium hydroxide is strongest base because it fully dissociate into ions.
It dissociate to gives the sodium and hydroxyl ions and solution became more basic.
NaOH → Na⁺(aq) + OH⁻(aq)
Its pH is 12. It is also known as caustic soda.
The pH of blood is vary from 7.35 - 7.45. it is slightly alkaline.
The pH of lemon juice is ranging between 2-3.
The pH of tap water is ranging between 6-8.5.
From above given information it can be noticed that lemon juice have lowest pH i.e 2-3. It is acidic, because its pH is less than 7.
Answer:
A. Antoine Lavoisier
Explanation:
He is know for creating the first chemical textbook. This textbook included rules for naming different chemical compounds, which is the still the same method we use to this day.
Hoped this can help! :D
Answer:
The total energy of the system is maintained as energy is transformed.
Explanation:
The total energy of the system is conserved.
Tree rings tell us how old the tree is.
The given compounds are alkanes. This means that the formula
is C_nH_2n+2
The general trend for boiling point in alkanes is that the
greater number of carbon atoms, the higher the boiling point. If the alkane is
branched, the branched alkane will have a higher boiling point than the
straight chain.
Taking these into account: propane < heptane <
triptane < hexadecane < paraffin