Answer:
Boron
Explanation:
Using the periodic table we can see that Period 2 represents the second row. Group 13 indicates the 13th column.
Answer:
The no. of moles of tungsten contains (4.8 x 10²⁵ atoms) = (1.0 mol) (4.8 x 10²⁵ atoms)/ (6.022 x 10²³ atoms) = 79.7 mol.
Explanation:
Mark brainly if you like my answer
Answer: Groups 15 and 16.
Explanation:
All other answer choices include metals, which form ionic bonds.
Answer:
The partial pressure of Ar is 356.3 mmHg
Explanation:
The concept of the molar fraction can be applied to calculate the partial pressure of a gas, in a mixture where the molar fraction is equal to the gas pressure, over the total pressure.
PCO2 / Total pressure = n° moles CO2 / Total moles
So we have the total pressure, the moles of Ar and the total moles
The sum of moles is moles Ar + moles CO + moles CO₂ =
1.27 + 3.04 + 1.5 = 5.81
1,5 moles of Ar / 5.81 moles = Partial pressure Ar / Total Pressure
1,5 moles of Ar / 5.81 moles = Partial pressure Ar / 1380mmHg
(1,5 moles of Ar / 5.81 moles) . 1380mmHg = Partial Pressure Ar
356,3 mmHg = Partial Pressure Ar
