What does 3 dots inside a silver ring mean?

Chemistry

2 answers:

Alex73 [517]3 years ago

8 0

It's reported inside the riddles or decorations

frez [133]3 years ago

3 0

There is really no way of knowing unless the particular 'maker' of the ring is reknown. I would suggest to take it to a jeweler to have it tested to see if it is real gold or gold platitum mixed etc. Most reliable jewelry stores will test it free, especially if you tell them, 'If this is real, I'm thinking about hiring you to polish it.; This is what I did the last time I found a gold/diamond ring, and after finding out it was the real deal, I paid them $25.00 to polish it, and it looks brand new.

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Which lab safety rule do you think is the most important to follow in chemistry lab?

Flauer [41]

Answer:

Practice good personal hygiene. Wash your hands after removing gloves, before leaving the laboratory, and after handling a potentially hazardous material. While working in the laboratory, wear personal protective equipment - eye protection, gloves, laboratory coat - as directed by your supervisor.

Explanation:

7 0

3 years ago

The monomer of poly(vinyl chloride) has the formula C2H3Cl. If there are 1,565 repeat units in a single chain of the polymer, wh

monitta

Answer:

$\large \boxed{9.780 \times 10^{4}\text{ u}}$

Explanation:

The molecular mass of a monomer unit is:

C₂H₃Cl = 2×12.01 + 3×1.008 + 35.45 = 24.02 + 3.024 + 35.45 = 62.494 u

For 1565 units,

$\text{Molecular mass} = \text{1565 units} \times \dfrac{\text{62.494 u}}{\text{1 unit }} = \mathbf{9.780 \times 10^{4}}\textbf{ u}\\\\\text{The molecular mass of the chain is $\large \boxed{\mathbf{9.780 \times 10^{4}}\textbf{ u}}$}$