The mass of KCl per volume of solution=.35X(35.5+39)=26.075g/L
The answer is b . when you increase the temperature your chemical the particles are getting energized and will be able to move around and they need to move around in order to be able to collide with energy that is greater than itself<span />
To find the atomic mass of an isotope, simply multiply the fraction by the mass<span> number for each </span>isotope<span>, then just add them together.</span>
Answer:
ΔH of CH4(g)+2O2(g)→CO2(g)+2H2O(l) is -899 KJ
Explanation:
step 1: write down thye reaction and rearrange them in a way that similar contents cancel out to produce the required reaction and add the enthalpy change of each.
CH4(g)+O2(g)→CH2O(g)+H2O(g) ΔH = -284 KJ
CH2O(g)+O2(g)→CO2(g)+H2O(g) ΔH = -527 KJ
2H2O(g)→2H2O(l) ΔH = 44 KJ x -2
the minus is because the last reaction has been reversed and multiplied by 2 so that the gaseous state H2O cancels with the others to leave liquid H2O in the required final reaction.
ΔHrxn = (-284)+(-527)+[44 x (-2)] = -899 KJ
Answer: B
Explanation:
B. Distance and Mass
Newton's Law of gravitation states
G being a constant
M being mass 1
m being mass 2
r being the distance between them from their center of mass