A basketball is inflated to a pressure of 1.50 atm in a 20.0°C garage. What is the pressure of the basketball outside
where the temperature is -5.00°C?

P = 1.37 atm

Explanation: For this problem we will use the Gay Lussac Law which is P1/T1 = P2/T2 then derive for P2 which is the outside pressure. Also remember to convert the units of temperature from °C to Kelvin.

T1 = 20°C + 273 = 293 K

T2 = -5°C + 273 = 268 K

P2 = P1 T2 / T1

= 1.50 atm ( 268 K ) / 293 K

= 1.37 atm

Cancel out the units of K so that the remaining unit will be in atm.

P₂ = 1.4 Atm

Explanation:

Volume is assumed to be constant => Gay-Lussac Law => P ∝ T (Decreasing Temperature => Decreasing Pressure expected).

=> Empirical Relationship => P₁/T₁ = P₂/T₂

P₁ = 1.5Atm                    P₂ = ?

V₁ = V₂                           V₂ = V₁

T₁ = 20.0°c (=293K)       T₂ = -5°C (=268K)

P₁/T₁ = P₂/T₂ => P₂ = P₁(T₂/T₁) = 1.5Atm(268K/293K) = 1.4Atm

the mantle

explanation:

earth is divided into three layers: the crust or the outermost layer on which we live; the underlying, middle layer - the mantle - and the core (the innermost layer of earth).

alkaline metals are lithium, sodium, rubidium, potassium, cesium and francium.

alkali metals have electronegativity from 0.7 to 1, lowest in periodic table of elements, which means that alkali metals (i group in periodic table) has positive oxidation number in compounds.

electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

alkaline metals (far left in main group) have lowest ionizations energy and easy remove valence electrons,

for example, potassium is the alkali metal and has a single valence electron in the outer electron shell.

electron configuration of potassium is: ₁₉k 1s²2s²2p⁶3s²3p⁶4s¹.

they can not exist alone in nature, because they are very reactive.