Answer is: The percent yield of lead chloride is 88%.
Balanced chemical reaction: 2HCl + Pb(NO₃)₂ → 2HNO₃ + PbCl₂.
m(PbCl₂) = 650 g; mass of lead (II) chloride.
m(Pb(NO₃)₂) = 870 g; mass of lead (II) nitrate.
n(Pb(NO₃)₂) = 870 g ÷ 331.21 g/mol.
n(Pb(NO₃)₂) = 2.63 mol; amount of lead (II) nitrate.
From balanced chemical reaction: n(Pb(NO₃)₂) : n(PbCl₂) = 1 : 1.
n(PbCl₂) = 2.63 mol; amount of lead (II) chloride.
m(PbCl₂) = 2.63 mol · 278.1 g/mol.
m(PbCl₂) = 731.4 g.
yield = 650 g ÷ 731.4 g · 100%.
yield = 88.88 %.
Answer:
Solubility of gases in water: a. decreases with increasing pressure above solution. b. increases with increasing pressure above solution.c. is independent of pressure above solution.d. Gases are not soluble in water.e. none of the above
The answer to the question is option B (increases with increasing pressure above solution).
Explanation:
Solubility is the chemical property of a solute to dissolve into a solvent. The solubility which is the characteristic property of a specific solute–solvent combination of a substance fundamentally depends on the solvent used, as well as temperature and pressure.
Concentration of molecules in the gas phase increases with increasing pressure. At low pressure, a gas has a low solubility, while at at high pressure, a gas has a high solubility. The rate at which gas molecules collide with the surface of the liquid and dissolve depends on the pressure of the gas in relation to the number of molecules of gas per unit volume. The solubility of gases in water, makes an increase in pressure result in a proportional increase in solubility, whereas a decrease in pressure decreases solubility.
This can be expressed in the equation: C= k x Pgas
where C= solubility of gas in solvent, k= proportionality constant and Pgas = partial pressure of the gas above the solution.
Answer:
The product of the reaction between a ketone and an alcohol is initially a hemiketal which yields a ketal on further reaction with another alcohol molecule.
The structure is found in the attachment.
Explanation:
This reaction is a <em>nucleophilic addition to the carbonyl group</em>. In organic chemistry, <em>a nucleophilic addition reaction is an addition reaction where a chemical compound with an electron-deficient or </em><em>electrophilic</em><em> double or triple bond, a pi (π) bond, reacts with electron-rich reactant, termed a </em><em>nucleophile</em><em>, with the elimination of the double bond and creation of two new single, or sigma (σ), bonds.</em>
In the reaction between a ketone and an alcohol, the <em>carbonyl</em> group of the ketone serves as the <em>electrophile</em> while the <em>hydroxyl</em> group of the alcohol is the <em>nucleophile</em>. The first product is known as a hemiketal because a single alcohol group has been aded to the carbonyl group of the ketone. Further nucleophilic additon of an alcohol group initiated by the presence of an acid e.g hydrochloric acid, results in the formation of a ketal which has two alcohol group added to the original ketone.
Answer:
48 grams of O₂ occupy 33.6L at STP
Explanation:
Let's apply Ideal Gases Law to this situation:
STP = Standard conditions of T° and pressure
T° = 273K
Pressure = 1 atm
P .V = n . R . T
1 atm . 33.6L = n . 0.082 . 273K
(1 atm . 33.6L) / (0.082 . 273K) = n
1,50 moles = n
Now, we must find out the mass of O₂ with the molar mass
Molar mass . moles = Mass
32 g/m . 1.5 moles = 48 g
Answer: The density if the bone is .
Explanation:
Mass of the bone = 3.8 grams
Volume of the bone =
Density is defined as mass present in per unit volume of the substance.
The density if the bone is .