Answer:
b.
Explanation:
Mitosis is important for growth and development of living organisms.
Answer:
ΔH°comb=-5899.5 kJ/mol
Explanation:
First, consider the energy balance:
Where
is the calorimeter mass and
is the number of moles of the samples;
is the combustion enthalpy. The energy balance says that the energy that the reaction release is employed in rise the temperature of the calorimeter, which is designed to be adiabatic, so it is suppose that the total energy is employed rising the calorimeter temperature.
The product
is the heat capacity, so the balance equation is:

So, the enthalpy of combustion can be calculated:

I will be happy to solve any doubt you have.
Answer:
E) I = 18.4 N.s
Explanation:
For this exercise let's use momentum momentum
I = Δp =
- p₀
The energy of the stone is only kinetic
K = ½ m v²
The initial energy is Ko and the final is 70% Ko
= 0.70 K₀
energy equation
= 0.7 ½ m v₀²
You can also write
= ½ m vf²
½ m vf² = ½ m (0.7 v₀²)
= v₀ √ 0.7
Now we can calculate and imposed
I = m (-vo √0.7) - m vo
I = m vo (1 +√0.7
I = 0.5000 20.0 (1.8366)
I = 18.4 N.s
Answer:
B. 1 m/s
Explanation:
Metric unit conversions:
0.3 km = 300m
5 minutes = 5*60 = 300 seconds
So if a seal can reach a depth of 300m in a time of 300 seconds, its diving speed is the distance divided by time duration
v = s/t = 300/300 = 1m/s
So B is the correct answer