Cl₂ is a compound
<h3>Further explanation</h3>
Pure substance can be any element or compound
Elements if composed of one atom
A compound if it is composed of two or more atoms, either of the same type or of different types
Cl₂ consists of 2 Cl atoms.
Cl with 7 valence electrons will try to get its stability by binding 1 more electron, by covalently bonding with other Cl atoms to form a Cl₂ compound in the form of a gas
<span><span>20 At standard pressure, which substance becomes less soluble in water as temperature increases from 10.oC to 80.OC? (1) HCl (2) KCl (3)NaCl (4)NH4Cl</span>1<span>Use Table G, HCl is a gas and slopes down</span></span>
Answer:
moles Na = 0.1114 g / 22.9898 g/mol=0.004846
moles Tc = 0.4562g /98.9063 g/mol=0.004612
mass O = 0.8961 - ( 0.1114 + 0.4562)=03285 g
moles O = 0.3285 g/ 15.999 g/mol=0.02053
divide by the smallest
0.02053/ 0.004612 =4.45 => O
0.004846/ 0.004612 = 1.0 => Tc
to get whole numbers multiply by 2
Na2Tc2O 9
Explanation:
Hope it right hope it helps
