Force acting on the body when the body is at rest the net formals is given
Answer:
Carbonated drinks in cans have a headspace to avoid explosion
Explanation:
- When we see in carbonated drinks in cans we can see there is a small amount of space above the liquid level known as the headspace. This space is not a wasted space. The gas filled in the can is compressed highly which when opened comes out with a high pressure with an explosion.
- Therefore, to avoid the carbonated drinks not to explode when shaken the carbonated drinks and the bottled juices have headspace. This means the headspace is not wasted.
Answer:
The standard enthalpy of formation of methanol is, -238.7 kJ/mole
Explanation:
The formation reaction of CH_3OH will be,
![C(s)+2H_2(g)+\frac{1}{2}O_2\rightarrow CH_3OH(g),\Delta H_{formation}=?](https://tex.z-dn.net/?f=C%28s%29%2B2H_2%28g%29%2B%5Cfrac%7B1%7D%7B2%7DO_2%5Crightarrow%20CH_3OH%28g%29%2C%5CDelta%20H_%7Bformation%7D%3D%3F)
The intermediate balanced chemical reaction will be,
..[1]
..[2]
..[3]
Now we will reverse the reaction 3, multiply reaction 2 by 2 then adding all the equations, Using Hess's law:
We get :
..[1]
..[2]
[3]
The expression for enthalpy of formation of
will be,
![\Delta H_{formation}=\Delta H_1+2\times \Delta H_2+\Delta H_3](https://tex.z-dn.net/?f=%5CDelta%20H_%7Bformation%7D%3D%5CDelta%20H_1%2B2%5Ctimes%20%5CDelta%20H_2%2B%5CDelta%20H_3)
![\Delta H=(-393.5kJ/mole)+(-571.6kJ/mole)+(726.4kJ/mole)](https://tex.z-dn.net/?f=%5CDelta%20H%3D%28-393.5kJ%2Fmole%29%2B%28-571.6kJ%2Fmole%29%2B%28726.4kJ%2Fmole%29)
![\Delta H=-238.7kJ/mole](https://tex.z-dn.net/?f=%5CDelta%20H%3D-238.7kJ%2Fmole)
The standard enthalpy of formation of methanol is, -238.7 kJ/mole
Sunlight is collected from a renewable resource, which is naturally replenished one a human timescale
<u>Respuesta:</u>
16 gramos de vitamina C y 8 gramos de colorantes.
Explanation:
Debemos multiplicar el porcentaje de cada componente por la cantidad total (100 %) de zumo.
800 g de zumo = 100%
- Tenemos un 2 porciento (2 en 100 o 2/100) de vitamina C. Por lo tanto, la cantidad en gramos de vitamina C es:
2/100 x 800 g = 16 g
- Tenemos un 1 porciento de colorantes en el zumo (1/100). Por lo tanto, la cantidad en gramos de colorantes es:
1/100 x 800 g = 8 g