Chemistry
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New answer posted
10 months agoContributor-Level 9
When positive charge increases, ionic radii decreases in isoelectronic ions
Al?³ < Mg? < Na? < K?
New answer posted
10 months agoContributor-Level 10
Δx . Δp = h/4π
Δx . mΔv = h/4π
Δv = 5 * 10? * 0.02/100 = 1000 m/s
∴ Δx = h/ (4πmΔv) = 6.63*10? ³? / (4*3.14*9.1*10? ³¹*1000)
= 5.8 * 10? m
= 58 * 10? m.
New answer posted
10 months agoContributor-Level 10
CH? + I? CH? I + HI
It is reversible due to reducing nature of HI but it can be irreversible by addition of oxidizing agents like, HNO? , HIO? , HgO, etc. which will oxidize HI into I?
New answer posted
10 months agoContributor-Level 10
P? = 300 kPa = 3 * 10? Pa = 3 bar
T? = 300 K
P? = 1.2 * 10? Pa = 12 * 10? Pa = 12 bar
T? =?
P? /T? = P? /T?
3/300 = 12/T?
T? = (12 * 300)/3 K = 1200 K
∴ T in °C = 1200 - 273 = 927°C
New answer posted
10 months ago
Contributor-Level 9
Novolac is a linear polymer obtained from phenol and formaldehyde by condensation reaction.
[Structure of Novolac polymer]
New answer posted
10 months agoContributor-Level 10
[MnCl? ]³?
Mn (25) → [Ar] 4s²3d?
Cl? → weak ligand
Mn³? → 3d? i.e. t? g³, eg¹
Hybridization → sp³d² and paramagnetic
New answer posted
10 months agoContributor-Level 10
Compound Oxidation state of P
H? P? O? → 5
H? P? O? → 3
H? P? O? → 4
New answer posted
10 months agoContributor-Level 9
Bauxite contains SiO?, TiO? & Fe?O? as impurities. SiO? being acidic is leached with NaOH as Na?SiO?.
Al?O? + 2NaOH → 2NaAlO? + H?O
SiO? + 2NaOH → Na?SiO? + H?O
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