Is the following chemical equation balanced? MgI2 + Br2 MgBr2 + I2 yes no
2 answers:
Yes
Explanation:
This chemical equation:
is balanced, because the number of atoms of each element is the same on the reactant side and on the product side. In fact:
- Mg: one atom on the left, one on the right
- I: 2 atoms on the left, and 2 on the right
- Br: 2 atoms on the left, and 2 on the right
So, the reaction is balanced.
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Answer:
a)
b)
c)
Explanation:
We have:
m: is the ball's mass = 1.5 kg
v₀: is the initial speed = 15 m/s
g: is the gravity acceleration = 9.81 m/s²
a) In the initial position we have:
h: is the height = 0
The potential energy is given by:
The kinetic energy is:
And the mechanical energies:
b) At 5 m above the initial position we have:
h = 5 m
The potential energy is:
Now, to find the kinetic energy we need to calculate the speed at 5 m:
And the mechanical energies:
c) At its maximum height:
: is the final speed = 0
Now, the potential, kinetic and mechanical energies are:
I hope it helps you!