Three significant figures would be 45.0 since it would end with the nine so you look at the next digit to see if you round up or it remains the same. It is greater than five so round up to zero. This makes the ones place also go up so the answer is 45.0 The zero after the decimal counts as a significant figure.
The chemical formula for an ionic compound is metal + nonmetal = ionic
Answer is: empirical formula of a compound is CaCl₂.
1) Calculate amount of substance for calcium
m(Ca) = 80 g.
n(Ca) = m(Ca) ÷ M(Ca).
n(Ca) = 80 g ÷ 40.078 g/mol.
n(Ca) = 1.996 mol.
2) Calculate amount of substance of chlorine
m(Cl) = 140 g.
n(Cl) = m(Cl) ÷ M(Cl).
n(Cl) = 140 g ÷35.45 g/mol.
n(Cl) = 3.94 mol.
3) n(Ca) : n(Cl) = 1.996 mol : 3.94 mol /1.996.
n(Ca) : n(Cl) = 1 : 2; one calcium atom and two chlorine atoms.
Explanation:
Both alcoholic group and carboxylic group are polar in nature.
This is because in carboxylic groups are both hydrogen bond acceptor and hydrogen bond donor. Also there is presence of two electronegative oxygen atoms.
Whereas in alcoholic groups also there is hydrogen bonding and there is one electronegative oxygen atom present.
Hence, it makes carboxylic group more polar.
Thus, we can conclude that and both are polar in nature.
Assuming that the concentration is given as 0.010M (there is a big difference between m and M):
Sulfuric Acid (H2SO4) is a strong acid, and thus will completely dissociate into ions in solution. This will result in
For each mole of H2SO4, there will be 2 moles of H+. So, [H+] = 0.0200M