Help me helpp me

The fourth option

Explanation:

So if you got the periodic table, you can search for boron and get it's Molar Mass: B=10.811u

We know the given mass and we know that there's only 1 mol of boron given, we can calculate it by the given:

We use avogadro's number (6.022×10²²), plug in our new value to get the # atoms: (Multiply 8.14 by Avogadro's number to get the atom number)

so the atom number for 88g of Boron would be : 4.90×10²² atoms of B

in the given question, the partial pressure is calculated by using the ideal gas equation, that is, pv = nrt

here, p is pressure, v is volume = 25 l, n is number of moles = 0.0104 moles, r is gas constant = -0.0821 l.atm / mol.k

t is temperature = 273 k

p = nrt / v

p = (0.0104 mol × 0.0821 l.atm / mol.k × 273 k) / 25 l

= 0.0093 atm

tracks, burrows, eggshells, nests, tooth marks, or gastroliths