The mass of the Pbl2 : 1308.87
<h3>Further explanation</h3>
Given
18.2 mL of a 0.156 M Pb(NO3)2
26.2 mL of a 0.274 M KI
Reaction
Pb(NO3)2 (aq) + 2 KI (aq) - Pbl2 (s) + 2 KNO3
Required
the mass of the Pbl2
Solution
mol Pb(NO3)2 = 18.2 x 0.156 = 2.8392 mlmol
mol KI = 26.2 x 0.274 =7.1788 mol
Limiting reactant Pb(NO3)2(smaller ratio of mol : reaction coeffiecient)
mol Pbl2 based on limiting reactant (Pb(NO3)2)
From equation, mol ratio of Pb(NO3)2 : Pbl2 = 1 : 1, so mol Pbl2=mol Pb(NO3)2=2.8392
Mass Pb(NO3)2 :
At STP, 1 mol = 22.4
1 mol = 6.022 X 10^ 23
so your answer is right it is B 6.022 X 10^ 23
<span>The acidity or alkalinity of an unknown aqueous solution is indicated by its pH value. pH value determines whether something is acidic or alkaline.</span>
Answer:
D- 31.9988 g/mol
Explanation:
The molar mass of a substance is the mass in grams of one mole of the substance. For a compound, the molar mass is the gram - formula mass or gram - molecular weight. It is determined by the addition of its component atomic masses;
To find molar mass of O₂;
Atomic mass of O = 15.9994g/mol
Molar mass of O₂ = 2(15.9994) = 31.9988g/mol
The statement that best describes a mixture is -
- two or more substances that are mixed but can be separated back to their original form, maintaining their original properties.
Explanation:
A mixture is that form of matter in which two or more substances are simply mixed in any proportion and it can be separated back to their original form.
- There are two types of Mixtures -
- Homogeneous Mixtures
- Heterogeneous Mixtures
<h2>___________________</h2>
In Homogeneous Mixtures, the composition is uniform throughout such as sugar in water , salt in water , sulphur in carbon disulphide , water and alcohol , whereas Heterogeneous Mixtures has non Uniform composition such as sand and salt , sugar and salt , wood , blood , water in soil etc.
- Pure substance is a Homogeneous material which consists of a single type of particles atoms or molecules with definite set of properties.
