The level of mercury in an open end manometer is 20mm higher on the open
ended side. Considering the gas is at STP, what is the pressure of the gas?

106,080 newtons per meter squared

Explanation:

First you take the density of mecury multiply by the height in meters then multiply by the gravity: 13600×0.02×10= 2720

Then add the answer to the standard atmospheric presssure:

2720+ 103,360= 106,080

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms

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