Hey there!:
Molar mass H2O = 18.02 g/mol
Δ<span>H vap = 40.7 kj/mol
</span>
energy = ( mass ) / ( molar mas H2O ) * ΔH vap
energy = ( 27.9 / 18.02 ) * 40.7
energy = 1.54827 * 40.7
energy = 63.09 Kj
Answer C
hope this helps!
Average speed in km/h:
S = D/T
T = 10/60 hrs
= 0.1667
S = 10 / 0.1667
= 59.988 km/h
True...............................
Answer:
A) 3.59 cm
Explanation:
Given that :-
The density of the gold ingot =
Given that:- Mass = 5.50 lbs
Also, considering the conversion of lbs to g as shown below:-
1 lb = 453.592 g
Thus,
Mass = = 2494.756 g
The volume = Length*Breadth*Height
Given that:- Length = 12.0 cm , Breadth = 3.00 cm
Considering the expression for density as:-
Solving for height, we get that:-
Height=3.59 cm
Gallium has 2 valence electrons.
Hope I helped? ^ω^