Answer:
981.82g or 0.982 kg
Explanation:
I believe this is Physics, but okay!
We have to use the Specific Heat Capacity formula here.
Heat energy = mass x specific heat capacity x change in temperature
mass = Heat energy/(specific heat capacity x change in temperature)
Heat energy is measured in Joules so we need to find out how to do this.
To find an amount in Joules, we are given 135g and 0.89J/g°C.
135g x 400°C = 54000 to give us g°C
54000 x 0.89 = 48060 By multiplying these two values, we get given 48060J.
This is because: g°C/1 x J/g°C = Joules on it's own
mass = (48060)/[0.89 x (80 - 25)]
mass = 981.82g
Answer:
I'm not sure if this is true but in science class I learned that stress can cause a risk of diseases
Explanation:
the more months of stress you have, the higher the risk
Answer:
(a) Benzene = 0.26; toluene = 0.74
(b) Benzene = 0.55
Explanation:
1. Calculate the composition of the solution
For convenience, let’s call benzene Component 1 and toluene Component 2.
According to Raoult’s Law,
where
p₁ and p₂ are the vapour pressures of the components above the solution
χ₁ and χ₂ are the mole fractions of the components
p₁° and p₂° are the vapour pressures of the pure components.
Note that
χ₁ + χ₂ = 1
So,
χ₁ = 0.26 and χ₂ = 0.74
2. Calculate the mole fraction of benzene in the vapour
In the liquid,
p₁ = χ₁p₁° = 0.26 × 75 mm = 20 mm
∴ In the vapour
Note that the vapour composition diagram below has toluene along the horizontal axis. The purple line is the vapour pressure curve for the vapour. Since χ₂ has dropped to 0.45, χ₁ has increased to 0.55.
I think the best answer is that the spinal fluid surrounds and protects the backbone. Also, it protects the brain from trauma. It acts as a shock absorber. It supplies nutrients to the nervous system tissue and removes waste products from the brain.
The Earth's core is the part of Earth in the middle of our planet. It has a solid inner coreand a liquid outer core.
