Answer:
The mass of oxygen that participates is 2.72g
Explanation:
Oxygen gas is O2.
O2 has the molar mass of approximately 32.
Mass can be calculated by multiplying the molar mass and the moles.
Moles = Mass/Molar mass
therefore, Mass= Moles*Molar mass
Which is equal to 32*0.085= 2.72g
NaH is an ionic compound as shown below, and is made of sodium cations (Na+) and hydride anions (H-). It has the same octahedral crystal structure as NaCl, with each sodium ion surrounded by six hydride ions. The free hydride ions give this molecule its strong basic character. hope this helps
An ion is an element that bears only one electric charge, either positive or negative. An isotope is an element with the same number of protons but a different number of neutrons. An electron is a negatively charged subatomic particle. A dipole fits the characteristics. Hence, the answer is B.
Answer:
The correct answer is - (4) 1s2 2s2 2p5 3s2
Explanation:
An excited state is a state when the valence electron has moved to some other higher energy orbital, from its ground state orbital. The ground state has a lower energy level or sublevel. In this case, the higher energy level orbit fills before the lower energy level.
In option 4, the last electron is filled in higher energy orbit 3s2 before filling the lower or ground energy level 2p5, in the ground state it would be 1s2 2s2 2p6 3s1 instead of 1s2 2s2 2p5 3s2.
Thus, the correct answer is option 4.
<span>The noble gases are a group of chemical elements that make up Group 18
on the periodic table. These gases all have similar properties under
standard conditions: they are all odorless, colorless, monatomic gases
with very low chemical reactivity.</span>
