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Wewaii [24]
3 years ago
8

What is the best reason for a student to remove a dangling bracelet when heating test tubes of acidic solutions in a hot-water b

ath in a chemistry lab?
Chemistry
2 answers:
allsm [11]3 years ago
8 0
So it doesnt touch and create a negative reaction

Evgen [1.6K]3 years ago
4 0

Explanation:

When we perform any experiment then it is advised to strictly follow the instruction in order to avoid any accident or mishappening in the laboratory.

Hence, when heating a test tube it is safe to remove the dangling bracelet because it is possible that the bracelet might pull over the test tube.

And, this may lead to spilling the reagent or acid present in the test tube.

Therefore, it may cause an accident in laboratory.

That is why, it is advised to remove a dangling bracelet when heating test tubes of acidic solutions in a hot-water bath in a chemistry lab.

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Example of gases collected through upward delivery​
fgiga [73]

Answer:

In this process The more dense gases are collected in a gas jar. Carbon dioxide, Nitrogen dioxide are collected by this way. Air is displaced upward thus, this process is known as upward delivery

Hope it helped :)

4 0
3 years ago
Read 2 more answers
23.495 g sample of aqueous waste leaving a fertilizer manufacturer contains ammonia. The sample is diluted with 72.311 g of wate
Otrada [13]

Answer:

1.86% NH₃

Explanation:

The reaction that takes place is:

  • HCl(aq) + NH₃(aq) → NH₄Cl(aq)

We <u>calculate the moles of HCl that reacted</u>, using the volume used and the concentration:

  • 32.27 mL ⇒ 32.27/1000 = 0.03227 L
  • 0.1080 M * 0.03227 L = 3.4852x10⁻³ mol HCl

The moles of HCl are equal to the moles of NH₃, so now we <u>calculate the mass of NH₃ that was titrated</u>, using its molecular weight:

  • 3.4852x10⁻³ mol NH₃ * 17 g/mol = 0.0592 g NH₃

The weight percent NH₃ in the aliquot (and thus in the diluted sample) is:

  • 0.0592 / 12.949 * 100% = 0.4575%

Now we <u>calculate the total mass of NH₃ in the diluted sample</u>:

Diluted sample total mass = Aqueous waste Mass + Water mass = 23.495 + 72.311 = 95.806 g

  • 0.4575% * 95.806 g = 0.4383 g NH₃

Finally we calculate the weight percent NH₃ in the original sample of aqueous waste:

  • 0.4383 g NH₃ / 23.495 g * 100% = 1.86% NH₃

6 0
3 years ago
How many neutrons make up one of these potassium atoms?
Doss [256]
Potassium has twenty neutrons
6 0
3 years ago
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Two forces are described below:
Mazyrski [523]

Answer:

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Explanation: Cuse ;) MeIsBigSmartsNow                                                                                         Its correct cuse ;)

3 0
4 years ago
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In a solution, the substance that has been dissolved is called the...
amm1812

Answer:

solute

Explanation:

The substance being dissolved is called a solute. The thing the solute is being dissolved in is called a solvent.

6 0
3 years ago
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