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yarga [219]
3 years ago
8

Why does a solution of acid and sodium thiosulfate go cloudy

Chemistry
1 answer:
klemol [59]3 years ago
4 0
The soulustion. turn cloudy due to the precipitation of Sulphur.
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Suppose a student started with 142.0 mg of trans-cinnamic acid, 412 mg of pyridinium tribromide, and 2.30 mL of glacial acetic a
nirvana33 [79]

Answer: Theoretical Yield = 0.2952 g

               Percentage Yield = 75.3%

Explanation:

Calculation of limiting reactant:

n-trans-cinnamic acid moles = (142mg/1000) / 148.16 = 9.584*10⁻⁴ mol

pyridium tribromide moles = (412mg/1000) / 319.82= 1.288*10⁻³ mol

  • n-trans-cinnamic acid is the limiting reactant

The molar ratio according to the equation mentioned is equals to 1:1

The brominated product moles is also = 9.584*10⁻⁴ mol

Theoretical yield = (9.584*10⁻⁴ mol) * (Mr of brominated product)

                             =  (9.584*10⁻⁴ mol) * (307.97) = 0.2952 g

Percentage Yield is : Actual Yield / Theoretical Yield = 0.2223/0.2952

                                                                                           = 75.3%

4 0
3 years ago
When a connector is marked with "al-cu," the connector is suitable for use with copper, copper-clad aluminum, and aluminum condu
IgorLugansk [536]

When connectors are marked with a combination of metals, it can be used as a connector of one of the metals or an alloy of the two metals. So in this case, since the marking is “Al – Cu” where Al is aluminium and Cu is copper, therefore the answer is:

<span>Yes, it is suitable for use with copper, copper-clad aluminum, and aluminum conductors.</span>

6 0
3 years ago
What is the smallest unit that makes up matter?
nalin [4]
The smallest unit that make up the matter is atoms.
PLEASE MAKE IT BRAINLEST I NEED ONLY 1 LAST BRAINLIST FOR MY PROMOTION
6 0
3 years ago
Read 2 more answers
A closed container is filled with oxygen. the pressure in the container is 275 kpa . what is the pressure in millimeters of merc
miv72 [106K]
1 kpa = 7.5 mm of Hg  [Remember it or can be found on internet ]

So, 275 kpa = 7.5 x 275  =  2062.5 mm of Hg

8 0
3 years ago
True or False: Jumpstart is a fast-paced method for identifying problems and solutions in a single session that can be used with
Tpy6a [65]

Answer:

<em><u>The answer is</u></em>: <u>False.</u>

<u />

Explanation:

Six Sigma is a methodology for continuous improvement that increases performance by controlling variability and focusing the process on customer specifications. It will be used within other methods such as Rummler: Brache, Scrum and TQM.

JumpStart is an educational media franchise for children, consisting mainly of educational games, produced by JumpStart Games.

<em><u>The answer is</u></em>: <u>False.</u>

3 0
3 years ago
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