A gaseous mixture, composed of Hydrogen and Helium, has a pressure of 3.4 atm. If the partial pressure of hydrogen is 2.1 atm, what is the partial pressure of the helium gas? (Hint: partial
pressures!!)
1.3 atm
0 3.4 atm
0 2.1 atm
5.5 atm
N

- 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

14 days is the half-life of phosphorus-32