Answer:
18m/s
Explanation:
Given parameters;
Initial velocity = 10m/s
Acceleration = 2m/s²
Time = 4s
Unknown:
Car's new velocity = ?
Solution:
We use one of the kinematics equation to solve this problem:
v = u + at
v = new velocity
u = initial velocity
a = acceleration
t = time
v = 10 + (2 x 4) = 18m/s
Answer: 4 mol H2O2
Explanation:
First we need to write an equation that relates H2O2 to H2O (water)
H2O2 --> H2O + O2
Now we need to balance the equation so there's the same amount of atoms on each side. We can do this by adding a 2 in front of the H2O2 and H2O. So our balanced equation is now:
2 H2O2 --> 2 H2O + O2
Now, we do dimensional analysis to answer the question.
4 mol H2O * (2 mol H2O2)/(2 mol H2O) = 4 mol H2O2