A sample of gas at 1.0 atm pressure has a volume of 20.0 L. If the
pressure is raised to 2.5 atm, what is the new volume? The
temperature is held constant.

New volume = 8.00 Liters

Explanation:

Boyles Law => P₁V₁ = P₂V₂

P₁ = 1.0 Atm

V₁ = 20.0 L

P₂ = 2.5 Atm

V₂ = ?

P₁V₁ = P₂V₂ = V₂ = V₁(P₁/P₂) = 20.0L(1.0Atm/2.5Atm) = 8.00L

convalent bond :

is a chemical bond formed by the sharing of electron between 2 atoms.

it is the direct chemical bond between 2 atoms.

in bond formation atoms are involved here.

electrovalent bond:

is a chemical bond defined as electroststic attraction between 2 atoms.

it is the electrostatic attraction between 2 atoms.

in bond formation, ions are involved here.

hope it

and ur welcm

: )

- 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