Answer is: b) subscripts in chemical formulas.
Law of multiple proportions is also called <span>Dalton's Law.
</span>John Dalton (<span>1766 – 1844) was an English </span>chemist and <span>physicist</span><span>.
</span>Ratios of the masses of elements combine as ratios of small whole numbers. This is <span>basic for writing down </span>chemical formulas<span> for compounds.</span>
Answer:
127.15 g of ZnCl₂
Solution:
The balance chemical equation is as follow,
<span> Zn + 2 HCl </span>→ ZnCl₂ + H₂
According to equation,
65.38 g (1 mole) of Zn produced = 136.28 g (1 mole) of ZnCl₂
So,
61.0 g of Zn will produce = X g of ZnCl₂
Solving for X,
X = (61.0 g × 136.28 g) ÷ 65.38 g
X = 127.15 g of ZnCl₂
Answer is: pH of benzoic acid is 4.052.
c(C₆H₅<span>COOH) = ck = 0.225 M.
</span>c(C₆H₅COO⁻) = cs = 0.160 M.
pKa(C₆H₅COOH) = 4.2.
Henderson–Hasselbalch equation for buffers: pH = pKa + log(cs/ck).
pH = 4.2 + log(0.160 M / 0.225 M).
pH = 4.2 - 0.148.
pH = 4.052.
