Answer:
<h3>The answer is 2.75 × 10²⁴ molecules</h3>
Explanation:
The number of molecules of CO2 can be found by using the formula
<h3>N = n × L</h3>
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
N = 4.56 × 6.02 × 10²³
We have the final answer as
<h3>2.75 × 10²⁴ molecules</h3>
Hope this helps you
Your instructor is probably expecting the answer B) III only.
III) The evolution or <em>absorption of heat</em> is evidence of a <em>chemical change</em>.
I) Boiling water and IV) mixing paint are <em>physical changes</em>.
II) A change in colour on mixing is usually an indication of a reaction (but not when mixing paint). However, in this case, the lighter blue colour might have happened simply because you are diluting the solution. You would have to do an experiment which is correct.
Answer:
In a turbine generator, a moving fluid—water, steam, combustion gases, or air—pushes a series of blades mounted on a rotor shaft. The force of the fluid on the blades spins/rotates the rotor shaft of a generator. The generator, in turn, converts the mechanical (kinetic) energy of the rotor to electrical energy.
Explanation:
Hope this helps!
Brain-List?
Answer:
C
Explanation:
O2 is a gas and gas has spread out molecules compared to the other states of matter. As such, liquid and solids have stronger intermolecular forces. Since dioxygen is the only gas in the possible answers, O2 has the weakest intermolecular force.
Physical change is a change in size, shape, state or solution. You still have the same material.
Chemical change forms a new substance. It can be seen by a color change, odor change, gas formation, precipitate formation or large change in energy.
Hope it helps
