Which sentence describes all atoms of one element? 1.) they have the same number of isotopes?
2.) they have the same number of neutrons?
3.) they have the same number of electrons?
4.) they have the same number of protons?

4. they have the same number of protons

Explanation:

while all the other particles and attributes can be changed, protons cannot.

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

b

explanation:

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