A higher temperature makes the particles move faster, that makes them collide more often. The answer would be this: "It increases the average kinetic energy and number of collisions per minute."
Answer:
C) The dissolving reaction of A was exothermic, and the dissolving reaction of B was endothermic.
Explanation:
hope this helps :)
E:2
M ummmmm
<em>try</em><em> </em><em>simplifying</em>
1.D 2.C 3.B 4.A is the answer i believe you're looking for.
The moles of each element found in a 5.00 g nickel coin is calculated as below
moles =mass/molar mass
calculate the mass of each element =% composition of element/100 x total mass of nickel
Mn = 9/100 x5 = 0.45g
Cu=56/100 x5= 2.8 g
Ag= 35/100x5= 1.75 g
moles of each element is therefore=
Mn = 0.45g/54.94 = 8.19 x10^-3 moles
Ag=1.75g/107.87 g/mol = 0.0162 moles
Cu = 2.8 g/63.5 g/mol=0.0441 moles