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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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Only positive ions have a charge. true or false?
Elis [28]

Answer:

true

Explanation:

5 0
3 years ago
Please explain how roasting a hot dog over a fire involves all three forms of heat transfer. Please use full sentences and corre
sergejj [24]

Ok so First of all we start with the fire. The fire gives off radiation because you can feel the heat through space. The fire also gives of conduction because you put the hotdog on the fire to cook it, and the hotdog will give off steam when it is hot causing it to give of Convection.

There is how cooking a hotdog over a fire uses all three heat transfer

3 0
3 years ago
Jeffrey is on his skateboard and starts skating down a ramp. Ten seconds later he is travelling at
AfilCa [17]

Answer: 2m/s^2

Explanation:

Velocity of skateboard = 20.0 m/s.

Time taken = Ten seconds (10 s)

Acceleration ​= ?

Recall that acceleration is the change in velocity of a body per unit time.

i.e Acceleration = (velocity / Time)

Acceleration = 20.0m/s ➗ 10 s

Acceleration = 2m/s^2

Thus, Jeffrey acceleration was 2m/s^2

7 0
3 years ago
An aqueous solution is analyzed and found to contain potassium ions and sulfite ions. write the equation for the dissolution of
enot [183]
1) T<span>he dissolution of the salt potassium sulfite:
K</span>₂SO₃(aq) → 2K⁺(aq) + SO₃²⁻(aq).
Potassium has +1 charge because it lost one electron to accomplish stabile electron configuration of noble gas argon.
2) From dissolution reaction: n(K⁺) : n(SO₃²⁻) = 2 : 1.
n(K⁺) = 0.700 mol.
0.700 mol : n(SO₃²⁻) = 2 : 1.
n(SO₃²⁻) = 0.700 mol ÷ 2.
n(SO₃²⁻) = 0.350 mol; amount of sulfite anions.
7 0
3 years ago
Explain acid rain and it effects to the environment​
PSYCHO15rus [73]

Answer:Ian is looking at cells using a microscope. He sees a nucleus and a large vacuole in the central area of a cell. What type of cell is he most likely looking at?

Explanation:

Ian is looking at cells using a microscope. He sees a nucleus and a large vacuole in the central area of a cell. What type of cell is he most likely looking at?

4 0
3 years ago
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