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: C5H14N2
Explanation:
The element mass are:
C = 58.77 g
H = 13.81 g
N = 27.42 g
To get their moles, we have to divide by the molar mass which will be:
C: 58.77 / 12.01 = 4.8934
H: 13.81 / 1.008 = 13.7004
N: 27.42 / 14.01 = 1.9572
We then divide by the smallest mole which will be:
C: 4.8934 / 1.9572 = 2.5
H: 13.7004 / 1.9572 = 7
N: 1.9572 / 1.9572 = 1
We then multiply by 2 so that we can get whole number ratio:
C: 2.5 × 2 = 5
H: 7 × 2 = 14
N: 1 × 2 = 2
Therefore, the empirical formula will be = C5H14N2
Answer:
Coefficients represents no of moles while subscripts represent no of atoms.
Answer : The volume of water produced by this reaction would be, 4.75 liters.
Explanation : Given,
Volume of HCl gas = 9.5 L
The balanced chemical reaction will be:
As we know that at STP, 1 mole of gas occupy 22.4 L volume of gas.
By the stoichiometry we can say that:
As, 4 liter volume of HCl gas react to give 2 liter volume of water
So, 9.5 liter volume of HCl gas react to give volume of water
Therefore, the volume of water produced by this reaction would be, 4.75 liters.