The alchemists were the first chemists, but they were also mixing chemicals, they believed that magic would help with their experiments.but it didn't. but their experiments of the science of chemistry did.<em><u></u></em>
Answer: 
Explanation:
Single replacement reaction is a chemical reaction in which more reactive element displaces the less reactive element from its salt solution.
A more reactive element is one which can easily lose or gain electrons as compared to the other element.
As Magnesium is more reactive than tin, it can easily displace tin from its salt solution 
and form magnesium chloride and tin in elemental form.
The balanced chemical equation is:
Answer:
P₂= 116.7 atm
Explanation:
Here apply the Boyle's law equations that states :at constant temperature the volume of a dry mass of a gas is inversely proportional to its pressure.
This is simplified as;
P₁V₁=P₂V₂ where P is pressure and V is volume
Given that;
P₁=1
V₁=1.81 m³
P₂=?
V₂=1.55*10^-2 m³
Apply the formula
1*1.81 =P₂*1.55*10^-2 m³
1.81/1.55*10^-2 =P₂
P₂= 116.7 atm
According to the research, the correct option is remove. An air-to-air heat pump removes heat from the outside air and deposits it in the conditioned space.
<h3>What are heat pumps?</h3>
It is characterized by being a thermal machine or a device based on thermodynamics that, through an absorption process, takes heat from one place and transfers it to another, that is, it extracts heat from a cold source to a hot one.
An air-to-air heat pump starts by sucking in outside air or recovers heat from outside and transfers it to a higher temperature level in the ambient air, raising the temperature of the room, being adjustable to adapt to the heating needs of the conditioned space.
Therefore, we can conclude that according to the research, the correct option is remove. An air-to-air heat pump removes heat from the outside air and deposits it in the conditioned space..
Learn more about heat pumps here: brainly.com/question/1081420
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