Answer: B) 2 (as indicated by electron distribution shown), but taking into account the real properties of this element, 4,7,8 also occur (see below).
Explanation:
This is the electron complement/atomic number of ruthenium, which actually has the structure [Kr] 5s1 4d7
Nevertheless, Ru does not form Ru(I) compounds and few Ru(II) compounds (RuCl2, RuBr2, RuI2). It also forms Ru(III)Cl3 and a larger number of Ru(IV) compounds, e.g. RuO2, RuS2. It also forms RuO4
Answer:
chicken wire paper mache paint food dyebak8ng soda white vinegar
Answer:
nothing
Explanation:
aslong as nothing falls off fhen the mass and weight wont change
n=m/M
8.0g÷58.10g/mol=0.14mol
V=n/c
0.14mol÷0.89M=0.16L=1.6×10²mL
Answer:
Hydroxyl ion concentration is
.
Explanation:
From the given,
pH of the solution = 11.30
pH+pOH = 14
11.30 + pOH = 14
pOH = 14-11.30 = 2.7
The pOH of the solution is 2.7
<u>Concentration of hydroxyl ion:</u>
![2.7= -log[OH^{-}]](https://tex.z-dn.net/?f=2.7%3D%20-log%5BOH%5E%7B-%7D%5D)
![log[OH^{-}]= -2.7=5.08\times10^{-11}M](https://tex.z-dn.net/?f=log%5BOH%5E%7B-%7D%5D%3D%20-2.7%3D5.08%5Ctimes10%5E%7B-11%7DM)
Therefore, hydroxylion concentration is
.