Answer:
the first.
Explanation:
Newton's law of universal gravitation, in part, states that every particle attracts every other particle in the universe.
We calculate first the initial pressure of the gas.
P = nRT/V
= (0.215 g/mL)(1 mol/16 g)(0.0821 L.atm/mol K)(302K)
= 0.333 atm
Using the relationship between the pressure and temperature,
P1/T1 = P2/T2
Substituting the known values,
(0.333 atm) / (29 + 273) = P2/(950)
P2 = 1.05 atm
Answer is: <span>the percent yield for this reaction is 75,37%.
</span>m(MgCl₂) = 962 g.
n(MgCl₂) = m(MgCl₂) ÷ M(MgCl₂).
n(MgCl₂) = 962 g ÷ 95,21 g/mol.
m(MgCl₂) = 10,1 mol.
n(MgCl₂) : n(Mg) = 1 : 1.
n(Mg) = 10,1 mol.
m(Mg) = 10,1 mol · 24,3 g/mol.
m(Mg) = 245,43 g.
ω(Mg) = 185 g ÷ 245,43 g · 100% = 75,37%.
Answer:
Formation of a precipitate
Explanation:
- A precipitate is a compound in solid-state that is formed when two soluble or aqueous compounds or salts react during a precipitation reaction.
- Precipitation reaction involves a reaction between two soluble salts or compounds to form a precipitate and an aqueous compound.
- For instance, a reaction between potassium chloride and silver nitrate is a precipitation reaction.
KCl(aq) + AgNO₃(aq) → KNO₃(aq) + AgCl(s)
- All the other choices are indicators of a chemical reaction or a chemical change.
