Final Velocity (VF) - Initial Velocity (VI) Time (t)
A cheetah starts at rest (0 m/s) and begins to run after an antelope. He runs for 180 seconds getting up to a velocity of 28 m/s. What is
the cheetah's acceleration?
Final Velocity (VF) =
m/s
Inital Velocity (Vi) =
m/s
Time =
seconds
What is the cheetah's acceleration?=
m/s2
Do not forget to round to one decimal place!

it is a good conductor

explanation:

given:

mass of na = 115 g

excess cl2

to determine:

mass of nacl produced

explanation:

given reaction is-

2na(s) + cl2(g) → 2nacl(s)

since cl2 is in excess, na will be the limiting reagent

as per the reaction stoichiometry na: nacl = 1: 1

i.e. moles of na reacted = moles of nacl formed

now, # moles of na = mass of na/atomic mass

                                  = 115 g/23 g.mol-1 = 5 moles

therefore, moles of nacl = 5

molar mass of nacl = 58 g/mol

mass of nacl = 5 moles * 58 g.mol-1 = 290 g

ans: amount of nacl produced = 290 g

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.