All categories

3 years ago

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.

You might be interested in

Which book has kinetic energy

bekas [8.4K]

Where is the picture

3 0

3 years ago

What is the osmotic pressure of a solution made from 22.3 g of methanol (MM = 32.04 g/mol) that was added to water to make 321 m

xxMikexx [17]

Answer: The osmotic pressure of a solution is 53.05 atm

Explanation:

To calculate the concentration of solute, we use the equation for osmotic pressure, which is:

$\pi=iMRT$

Or,

$\pi=i\times \frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (in mL)}}\times RT$

where,

$\pi$ = osmotic pressure of the solution = ?

i = Van't hoff factor = 1 (for non-electrolytes)

Mass of solute (methanol) = 22.3 g

Volume of solution = 321 mL

R = Gas constant = $0.0821\text{ L.atm }mol^{-1}K^{-1}$

T = temperature of the solution = $25^oC=[273+25]=298K$

Putting values in above equation, we get:

$\pi=1\times \frac{22.3\times 1000}{32.04\times 321}\times 0.0821\text{ L.atm }mol^{-1}K^{-1}\times 298K$

$\pi=53.05atm$

Hence, the osmotic pressure of a solution is 53.05 atm

7 0

2 years ago

One quarter of a 1-mole piece of iron turns to rust in six months. Which rate describes the speed at which the iron rusts?

avanturin [10]

1/4 mol = 0.25 mol

6 months = 0.5 year

rate = 0,25 mol / 0.5 year = 0.5 mol/year or approx 0.042 mol/month

7 0

3 years ago

Read 2 more answers

The structure of a water molecule (H20) can be written as H-O-H, with each dash representing a chemical bond.

svet-max [94.6K]

Answer:

oxygen shows 2 bonds with hydrogen

8 0

2 years ago

What types of evidence do scientists use to determine evolutionary relationships among groups

lions [1.4K]

There are several things that can help scientists evaluate which category something belongs to. The similarity in features is one of them. If two skulls looked alike, they were probably species of the same evolutionary category. For example say humans and monkeys rather than humans and dogs.
Similarly fossils have helped scientists categorise species. Study of the chromosomes (in cases with available chromosomes) can help scientists figure out a lot about the subjects and categorise them.

5 0

2 years ago