Answer:
Ba(ClO₃)₂ → BaCl₂ + 3 O₂ <em>Descomposition. </em>
CaO + CO₂ → CaCO₃ <em>Combination. </em>
NaNO₂ + HCl → NaCl + HNO₂ <em>Double replacement. </em>
Mg + ZnSO₄ → MgSO₄ + Zn <em>Single replacement. </em>
Explanation:
A combination reaction is defined as a reaction in which two or more substances combine to form a single new substance.
A + B → AB
A descomposition reaction is defined as a reaction in which a compound breaks down into two or more simpler substances.
AB → A + B
A double replacement is a chemical reaction were the positive and negative ions of two ionic compounds exchange places to form two new compounds.
AB + CD → AD + CB
A single replacement is another type of reaction were one element replaces a similar element in a compound.
A + BC → AC + B
Thus, with this information it is possible to classify these reactions as:
Ba(ClO₃)₂ → BaCl₂ + 3 O₂ <em>Descomposition. </em>One single molecule breaks down into two or more molecules
CaO + CO₂ → CaCO₃ <em>Combination. </em>Two substances are combined to form one single molecule
NaNO₂ + HCl → NaCl + HNO₂ <em>Double replacement. </em>Na and H are exchange places to form two new compounds
Mg + ZnSO₄ → MgSO₄ + Zn <em>Single replacement. </em>Mg is replacing Zn.
I hope it helps!
A 25.00 ml sample of hydrochloric acid solution, HCl, is titrated with 0.0512 m NaOH solution. the volume of NaOH solution required is 21.68 ml then the molarity of the HCl solution is 0.044 M .
Calculation ,
Formula used : ...( i )
Where M is the molarity or concentration and V is the volume in ml .
concentration of hydrochloric acid solution ( ) = ?
concentration of NaOH ( ) = 0.0512 M
volume of hydrochloric acid solution ( ) = 25.00 ml
volume of NaOH ( ) = 21.68 ml
Putting the value of concentration , volume of both in equation ( i ) we get .
× 25.00 ml = 0.0512 × 21.68 ml
= 0.0512 × 21.68 ml / 25.00 ml= 0.044 M
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Mass of lead Pb = 4.00 g (given)
Density of lead= 11.34 g/mL (given)
When lead is placed in a graduated cylinder which is partially filled with water, the volume of lead will be the volume of water displaced by it.
Density (d) of a substance is the ratio of mass (m) to the volume (m) of the substance.
The formula of density is given as:
Putting the given values of density and mass of lead, we get
Rearrange the equation, to find the volume
Therefore, volume replaced by lead is 0.353 mL
Answer:
I
Explanation:
I dont know, man, that looks hard man. I wish i could help you right now but i got trampled over by a group of screaming goats. i think i got a concussion man, I canyt think straight.
Answer:
Here's what I find
Explanation:
You don't use ΔHfus. You use ΔHvap
There are some preliminary calculations:
- Use the density of the liquid to calculate its mass.
- Use the molar mass to calculate the moles (n)
The formula for the heat (q) absorbed during vaporization is
q = nΔHvap
Insert your numbers into the formula, do the calculation, and you have the answer.