Answer:
26.20% w/w of KBr in the sample
Explanation:
Mohr titration is a way to quantify Br⁻ and Cl⁻ ions in solution. The reaction is:
KBr(aq) + AgNO₃(aq) → KNO₃(aq) + AgBr(s)
<em>where 1 mole of KBr reacts per mole of AgNO₃</em>
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Thus, moles of AgNO₃ in (25.13mL-0.65mL = 24.48mL) of a 0.04614M solution are:
0.02448L × (0.04614mol / L) = 1.130x10⁻³ moles of AgNO₃ = moles of KBr.
Mass of KBr -Molar mass: 119g/mol- is:
1.130x10⁻³ moles of KBr × (119g / 1mol) = <em>0.1344g of KBr</em>
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Thus, %w/w of KBr in the sample is:
%w/w = 0.1344g / 0.5131g ×100 = <em>26.20% w/w of KBr in the sample</em>
Answer:
The answer is freezing (Option B)
Explanation:
To begin with, it is important to note that lava flowing from Hawaiian volcanoes are not sticky but very runny. They cool down or freeze after flowing a long way.
Since the lava is not sticky (because it is not thick), it means they are thin and prone to freezing or cooling immediately when the flow stops. Upon freezing, the lava forms crystal rocks (shiny in texture and gray in color) that are not big.
Answer:
D.
Explanation:
chemical erosion is where the composition of a rock changes.
The power plant would be Mitochondrion because it makes ATP for the cell. Hope this helps!
Answer:
Butanoic acid.
Explanation:
Hello,
In this case, when a primary alcohol such as 1-butanol (OH is bonded to a primary carbon) is oxidized in the presence of a strong oxidizing media such as potassium dichromate (K2Cr2O7) and sulfuric acid, the stepwise oxidation goes to the corresponding aldehyde with a further oxidation to the corresponding carboxylic acid:
Therefore, on the attached picture you can find that the formed aldehyde is butanal and the inly organic product, due to the strong oxidizing media is finally butanoic acid.
Best regards.