Answer:
I have no Idea please give more context to your question.
Explanation:
In the chemical reaction in which sucrose is heated and decomposes to form carbon dioxide and water a. sucrose is a reactant
To find the freezing point, you use the following formula
fp solution= fp solvent - Δfp solution
fp solvent= 0 C (since the solvent was not stated, you can assume is water which freezing point is 0 degree celsius)
but first, we need to find the depression in freezing point (Δfp solution)
Δfp solution= Kf x i x m, where Kf is constant for the solvent, i is the number of particles produced by the solute and m is the molality of the solution.
Kf= 1.86 for water
i= 4 , becausethe solute breaks into 4 ions, K3PO4---> 3K+ + PO4-3
m= 2.60
Δfp solution= (1.86) (4) (2.60)= 19.3 C
fp solution= 0 - 19.3C=<span> -19.3C
</span>
for boiling point, we use a similar formula and way to solve it.
Δbp solution= bp solvent + Δbp solution
bp solvent= 100 C for water
to find the elevation boiling point (Δbp soln) is equal to:
Δbp solution= Kb x i x m
Kb= 0.512
i= 4
m= 2.60
Δbp solution= (0.512) (4) (2.60)= 5.32 C
bp solution= 100C + 5.32C= <span>105.32 C</span>
Answer:
Explanation:
Physical and chemical properties of acids:
Acids are sour in taste.
All acids have pH less than 7.
All acids turns blue litmus paper red.
Acids react with metals and form salts.
HCl + Mg → MgCl₂ + H₂
Acids react with base and form salt and water.
HCl + NaOH → NaCl + H₂O
Acids react with carbonates and form carbon dioxide, water and salt.
2HCl + CaCO₃ → CaCl₂ + H₂O + CO₂
Physical properties of bases:
All bases are bitter in taste.
They turn litmus paper from red to blue.
They are slippery.
All bases have pH above 7.
Bases react with acid and form water and salt.
NaOH + HCl → NaCl + H₂O
Bases conduct electricity.
Bases such alkali when react with water produces OH⁻.
Answer:
Astronomers study light from distant objects. ... Optical telescopes collect visible light. The three main types are reflecting telescopes, refracting telescopes, and catadioptric telescopes. Radio telescopes collect and focus radio waves from distant objects.
