Sorry it’s upside down but i really need with these 2 can someone explain

Explanation:

26)

n = 13.23 mol

Explanation:

Volume = 72 L

Pressure = 344.4 KPa (344.4/101 = 3.4 atm)

Temperature = 225 K

Moles of gas = ?

Solution:

PV = nRT

n = PV/RT

n = 3.4 atm . 72 L / 0.0821 atm. L /mol. K . 225 K

n = 244.8 mol /18.5

n = 13.23 mol

27)

c) The balloon might pop due to increase in volume of gas by the heat.

Explanation:

It is known that every thing expend on heating. when balloon is inflated to its capacity in summer it will pop because gas inside it get warmer because of heat and gas molecules move faster because of high kinetic energy. Thus gas expand and put force on balloon which then get explode.

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer