they are made by of two types of elementary particles
electrons and quarks
quetion answered by
(jacemorris04)
I) cc14
ii) h20
iii) i’m not sure
not fully sure but hope this helps!
A. Theresa is going to be my girl this year, he promised himself as he left the gym full of students in his new fall clothes.
Answer:
The solution is given below
Explanation:
Heat, q= mc∆T
q= 125g x 4.18 J/g∙°C x (21.18x- 24.28) °C
q= -1619.75J
NEGATIVE SIGN INDICATES THAT HEAT IS ABSORBED.
Enthalpy Change, ∆H = 1619.75 7/ 10.5 g
= 154.26 J/g
No. of moles of KBr = Mass of KBr/ Molecular Weight of KBr
=10.5g/119gmol-1
=0.088 mol
∆H= 1619.75 J/ 0.088 mol
= 18.41 kJ/mol
