1 yd2 = 8.361×10-25 Tm24.14×1025 yd2 = 4.4×1025 × 8.361×10-25 Tm2= 36.7884 Tm2
1 Answers 1 viewsd,e
1 Answers 1 viewspH= -log[H+]pH= -log[1×10^-3]pH= 32) pH= -log[3.6×10^-5]pH= 5-log3.6pH= 4.44
1 Answers 1 viewsH= mcΔtm= H/cΔt= 42000/(4.2×100) = 100g
1 Answers 1 viewsFreezing point of water = 0°CBoiling point of water = 100°CCwater = 4.2 Jg-1°C-1q = m × c × ∆T m = q/∆T × c= 42.6/(100-0) × 4.2= 0.01g
1 Answers 1 viewsa) 4x3
1 Answers 1 viewsv=m/Mv(HCl)=5mol5mol=m/36.6g/molm=183gv(HCl)2=12+2=14molm(HCl)=14mol*36.6g/mol=512.4gw=183g/512.4g*100%=35.71%
1 Answers 1 viewsKb-the degree of dissociation of the solution into ionsRight variant: 4
1 Answers 1 views147N+42He→178O+11H714N+24He→817O+11H is an example of a fission reaction
1 Answers 1 views1 cubic metre =1000 litres10l = 1×10/1000 = 0.01B. 0.01m3
1 Answers 1 views