Question

hii friend iam prachi vishwakarma iam 13 year old and how old are you any one asked questions for me I am solve esliye​

Answer 1

Answer:

Calcium formate is separated from the solution, heat treated to remove formaldehyde and then dried. Calcium formate can also be made from calcium hydroxide and carbon monoxide at high pressure and temperature – e.g., at 180 °C and 35 atm. It may also be made from calcium chloride and formic acid.

Explanation:

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Answer 2

The discovery of an easily portable substance to write on is almost as old as writing itself. Around 3000 BC, in Egypt, people begin making a flexible smooth surface, which will accept and retain ink without blur or smudge.

It is known by the name of the aquatic plant which provides the structure - papyrus. It will remain in regular use longer than any other material in the history of written documents.