Answer: Tyndall effect is the scattering of light due dispersed colloidal particles that does not settle in a solution. Colloidal particles constantly moves because of Brownian motion and blocks or hinders light particles to pass through. Colloidal particles are medium sized particles but smaller enough than suspension.
Explanation:
Below are the choices:
a. −166 kJ/mol
<span>b. 166 kJ/mol </span>
<span>c. 1.64 kJ/mol </span>
<span>d. 1.66 × 10^5 kJ/mol
</span>
To calculate the activation energy of a reaction, we use the Arrhenius equation. You may want to look it up to see how and why it works. In the problem you posted, there are two temperatures and two rate constants. After some rearranging and substitution of the Arrhenius equation, we have Ea = R T1 T2/(T1-T2) ln(k1/k2) = 8.314 J/mol K (600 K)(650 K)/(600 K-650 K) ln(2.7×10^-4 M^−1sec^−1/3.5×10^−3 M−^1sec^−1) = 166145 J/mol = 166 kJ/mol => choice b
Answer:
It's the third option
Explanation:
Because the particles of the solid are very closed together and packed they can barely move, causing the item to have a fixed shape and volume.
<h3>
Answer:</h3>
The law of conservation of mass has already been applied. There is an equal number of each element on both sides of the equation.
<h3>
Explanation:</h3>
<u>We are given;</u>
C₂H₄ + 3O₂ → 2H₂O + 2CO₂
We need to ask ourselves the following questions;
Is the equation balanced?
- Yes, the equation because the number of atoms of each element is equal on both sides of the equation.
- That is; Reactants: 2 carbon atoms, 4 hydrogen atoms and 6 oxygen atoms.
- Products: 2 carbon atoms, 4 hydrogen atoms and 6 oxygen
What is the law of conservation of mass?
- According to the law of conservation of mass, the mass of reactants should always be equal to the mass of the products in chemical reactions.
What makes the equation obey the law of conservation of mass?
- For an equation to obey the law of conservation of mass, it must be balanced.
- In this case, <u>the equation given is already balanced and therefore obeys the law of conservation of mass</u>.
Units of the SI System
There are seven base units in the SI system:
the kilogram (kg), for mass
the second (s), for time
the kelvin (K), for temperature
the ampere (A), for electric current
the mole (mol), for the amount of a substance
the candela (cd), for luminous intensity
the meter (m), for distance
Hope this helps! <3
