<em>Answer:</em>
- PbS are not soluble in water.
<em>Solubility rule:</em> "<em>Like dissolve like</em>"
<em>Reason of insolubility of PbS.</em>
- When sulphides are attached with group one and group two elements of periodic table, they are soluble but when they are attached with transition metals like Pb, there is highly covalent bond which makes difficult dissociation of bonds in water.
- KClO2 and NH4Br are inoic substances , so they are easily soluble. HNO2 is weak acid which can ionize in water.
Answer:
Br Be Ge
Explanation:
Increases in electron affinity
Answer:
A-) 8 Atoms
B-) 6 Atoms
C-) 16 Atoms
D-) 24 Atoms
Explanation:
A) Na (1 Atom) C2 (2 Atoms) H (1 Atom)O4 (4 Atoms)
1 + 2 + 1 + 4 = <em>8 Atoms</em>
B) H (1 Atom) 2F( 2 Atoms) 2B (2 Atoms) Li (1 Atom)
1 + 2 + 2 + 1 = <em>6 Atoms</em>
C) 2 He2 (2 Atoms) P (1 Atom) S1 (Atom) O4 (4 Atoms)
2 . ( 2 + 1 + 1 + 4 ) = 2 . 8 = <em>16 Atoms</em>
D) 3 He2 (2 Atoms) O4 (4 Atoms) P (1 Atom) H (1 Atom)
3 . (2 + 4 + 1 + 1 ) = 3 . 8 = <em>24 Atoms</em>
<em>It looks messy but I hope it will be understood.</em>
<em>If I have any inaccuracies please let me know.</em>
<em>Have a nice day and never stop questioning!</em>
Answer:
Explanation:
we know that specific heat is the amount of heat required to raise the temperature of substance by one degree mathmeticaly
Q=mcΔT
ΔT=T2-T1
ΔT=26.8-10.2=16.6
C for water is 4.184
therefore
Q=1.00*4.184*16.6
Q=69.4 j
now we have to covert joule into calorie
1 calorie =4.2 j
x calorie=69.4 j/2
so 69.4 j =34.7 calorie thats why 34.7 calorie heat is required to raise the temperature of water from 10.2 to 26.8 degree celsius