Answer:
1.03mole
Explanation:
Given parameters:
Pressure = 0.884 atm
Temperature = 6°C = 273 + 6 = 279k
Volume = 26.5L
Unknown:
Number of moles = ?
Solution:
To solve this problem, we use the ideal gas equation:
PV = nRT
P is the pressure
V is the volume
n is the number of moles
R is the gas constant = 0.082atmdm³mol⁻¹K⁻¹
T is the temperature
n = 
= 
= 1.03mole
Notch gfi.hu,ivjmgfcmhtxumgfhkvHbyrdyu,
Answer:
pH = 0.832
Explanation:
pH is given by the formula;
pH = - log [H+]
in this case we are given 0.147 M HCl
HCl is a strong acid and therefore completely dissociates to give out H+ ions,
Therefore; [H+] = [HCl] = 0.147 M
Hence;
pH = - log 0.147 M
<u> = 0.832 </u>
Gold has a heavy enough nucleus that its electrons must travel at speeds nearing the speed of light to prevent them from falling into the nucleus. This relativistic effect applies to those orbitals that have appreciable density at the nucleus, such as s and p orbitals. These relativistic electrons gain mass and as a consequence, their orbits contract. As these s and (to some degree) p orbits are contracted, the other electrons in d and f orbitals are better screened from the nucleus and their orbitals actually expand.
Since the 6s orbital with one electron is contracted, this electron is more tightly bound to the nucleus and less available for bonding with other atoms. The 4f and 5d orbitals expand, but can't be involved in bond formation since they are completely filled. This is why gold is relatively unreactive.
Hope it helps
An atom has an average atomic mass of about 63.5 amu.
<span>
1 amu is equal to 1 gram per mole
so 63.5 amu is just equal to 63.5 grams per mole or 63.5 g/mol
the answer is Cu or copper.
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