azaylia asked:


I am having a problem with the build up of scaling on my distillation flasks after distillation. This is probably due to the hardness of the water? (I use distilled water)
What can I use to remove this?
I have used conc. H2SO4, detergent soaking with hot water and ethanol, but none have worked.
I am not distilling distilled water.
I am doing Ammonia and TKN analysis (diluted with distilled water).
After distillation there is a deposit on the flask.

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chottan_mottan asked:


Some conditions
- it cannot be CZ or mossanite
- Hardness should be close to 10, same as natural diamond

I saw some “russian lab diamond” on ebay, but they have hardness mohr’s scale of 8.5. Any suggestions?

Kansieo.com

Upon this rock asked:


CATHOLIC QUIZ 2
HARDNESS LEVEL: *3* [[The scale is 1 – 4 (4 being the hardest) ]]

All are welcome—please include if you are Catholic.

This quiz is not a “True or False” quiz.

(1)What three conditions are necessary for a sin to be considered mortal?
(2)Which virtue is known to be the “remedy” for the deadly sin, Pride?
(3)Christians baptize with water in different ways: Immersion, Aspersion, and Infusion.
-Which two ways does the Catholic Church prefer?
(4)What is the ultimate authority that interprets what the biblical text means for the Catholic faith?
(5)What color are the priest’s vestments in Lent (and Advent)?

**I will post correct answers in 5 minutes or so
++Answer the Ones You Know

++The First to get All Correct
will be awarded “Best Answer” by me (and you’ll get points)

++Include your Religion/denomination
ANSWES:
1–grave matter, full knowledge, deliberate consent
2–Humility
3–Immersion, Infusion
4–Magisterium
5–Purple/violet

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~ asked:


whats the hardness of pure tin on moh’s scale?

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jayancjaa asked:


Fiber glass Reinforcement Plastic (FRP) pipe hardness testing -how to use the barcol machine and what is the unit of hardness? how to measure? Is there any scale or dial guage? Please explain these matters to me.

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$aR@I-I T asked:


If i have this mineral and i think that it is feldspar how can i be sure that it is by useing The Mohs scale of mineral hardness?????????????

PLZ I REALLY NEED HELP SUM 1 HWLP ME PLS!!!!!!!!!!!!!!!!!!!!

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Drew C asked:


I have a blue topaz ring, which is rated at an 8 on the hardness scale. I’ve read that it’s okay to wear it everyday, but I’ve also heard not to.
If you have a topaz ring, how often do you wear it, how long have you had it and how is the condition?

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✌♥☆ asked:


I was wondering how rubies formed, Also I was wondering if their a nine on the hardness scale, couldn’t they only be cut with diamonds? thanks!

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yoyo asked:


It is dark green in the centre and the outside is light green, and it is completly transparent. I found it on a beach at lake huron. It was out pretty far were it was wavy and there were no other rocks (the other rocks probably got eroided), so I’m guessing it’s pretty hard (an 8 - 9 on the mohs hardness scale). It’s approximatly 30 carats. Could it be an emerald?

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metal gear asked:


tungsten is the strongest metal out there so ive heard and it has like a 9.0 on the moh’s hardness scale and i was wondering if there was anyone capable of forging a folded steel katana but out of tungsten?
haha i know how regular steel katanas are forged
its just that i wanted to know if there where katanas out there that would cut through harder objects without having to be sharpened and wont get chips in it
hahaha ahh thats what it was called tungsten carbide i forgot the other part of the name so i just left it at tungsten
but i mean is there any metal harder than steel thats smith able into one? it does not matter about the weight

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