Physical. chemical only applies when it undergoes a reaction
Answer:
Standardisation is used to determine the concentration of a volumetric solution in order to achieve accurate and reliable titration results
Answer:
The temperature of the boiler is approximately 147.1 °C
Explanation:
A Carnot engine is an ideal engine that has the highest efficiency among all the engines because the second law of thermodynamics.That efficiency
is:

with
the temperature of the hot reservoir (the boiler temperature) and
the temperature of the cold reservoir (the steam temperature). Solving for
:

207 is the mass number. 82 would be the atomic number
<span>Because protons are positively charged and neutrons have no charge then it is safe to say that such an atomic model would have the positive charge concentrated in the center of an atom (option d).</span>