The substances for moving things is that they are in motion which is Kinetic Energy
Answer:
B. 0.971 g
Explanation:
When MgCl₂(aq) reacts with Pb(NO₃)₂(aq), PbCl₂(s) and Mg(NO₃)₂(aq) are produced:
MgCl₂(aq) + Pb(NO₃)₂(aq) →, PbCl₂(s) + Mg(NO₃)₂(aq)
Thus, we need to find imiting reactant finding moles of each reactant:
<em>Moles MgCl₂:</em>
15.5mL = 0.0155L * (0.225 mol / L) = 3.49x10⁻³ moles
<em>Moles Pb(NO₃)₂:</em>
37.5mL = 0.0375L * (0.250mol / L) = 9.38x10⁻³ moles
As the ratio of the reactants is 1:1, the moles of PbCl₂ are 3.48x10⁻³ moles.
We need to convert thes moles to mass using molar mass of PbCl₂ (278.1g/mol), thus:
3.48x10⁻³ moles * (278.1g/mol) =
0.968g of PbCl₂ are precipitate
Thus, right answer is:
<h3>B. 0.971 g</h3>
The chemical reaction is balanced.
Explanation:
We have the following chemical reaction:
NaOH + HCl → NaCl + H₂O
It is a neutralization reaction between a base and an acid which produce a salt and water.
To balance the chemical reaction the number and type of atoms entering the reaction have to be equal to the number and type of atoms leaving the reaction. We do that to conserve the mass.
We do not need to add other stoechiometric coefficients because the reaction is already balanced.
1 Na atom is entering the reaction and 1 Na atom is leaving the reaction
1 Cl atom is entering the reaction and 1 Cl is leaving the reaction
1 O atom is entering the reaction and 1 O atom is leaving the reaction
2 H atoms are entering the reaction and 2 H atoms are leaving the reaction
Learn more about:
balancing chemical reactions
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