The answer will depend on the material of the metre stick. Some are wood but there are also plastic or metal ones.
2.2 hectograms.
No the meter stick is larger
Hectograms can't be converted to microns since they are not compatible to each other. Hectograms deals with mass while microns deals with length.Hence, there is no way to determine 30 hg in microns.
7.4 kilograms
In one liter there are 100,000 hectograms. There are 100 hectograms in one gram, and that is multiplied by the 1,000 grams in a liter.
The answer will depend on how wide and thick it is.
2.2 hectograms.
Mass.
You can measure mass.
since it is balanced the net moment about the pivot is zero. The meter stick center of gravity mass is at the 50 cm point, or 25 cm to the right of the pivot. 150 x 25 = mass of stick x 25 ; so mass is also 150 grams
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At 500 mm, halfway through the width of the stick.
meter stick
There aren't any because hectograms are measurement for weight.
What is your question
its mass increases as per Einstein's relativistic variation in mass...
No. A stick is a stick and a meter is a unit of length.