Evaporating is a type of cooling process so then the alcohol starts evaporating and takes the heat from your arm and it feels cold because it evaporates, which makes it feel cool.
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Answer:
76.1g
Explanation:
The balanced equation for this reaction is as follows:
3NaOH + AlCl3 --> Al(OH)3 + 3NaCI
From the above equation, it can be observed that 1 mole of AlCl3 is needed to produce 3 moles of NaCl.
Using the formula below, we convert the mass of NaCl to moles;
Molar mass of NaCl = 23 + 35.5 = 58.5g/mol
mole = 100/58.5
mole = 1.71mol of NaCl
Since 1 mole of AlCl3 is needed to produce 3 moles of NaCl.
Then 1.71 moles of NaCl will be produced by 1.71/3 = 0.57mol of AlCl3
Molar mass of AlCl3 = 27 + 35.5(3)
= 27 + 106.5
= 133.5g/mol
Mole = mass/molar mass
Mass = molar mass × mole
Mass = 133.5 × 0.57
Mass = 76.1g
You find the molar mass of NaCl first, by adding the weight of both to get 58.44g.
Then you set up the equation with what is given:
2.4mol NaCl and multiply it by 58.44g NaCl to get your answer= 140.256g
<span>Anions and cations attract one another by means of.. the forces of attraction that hold oppositely charged ions together in ionic compounds
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Answer:
the object falls faster and faster until it strikes the ground.
Explanation:
-When objects are in free fall, the only force acting on these objects is gravity. Free fall thus occurs when an object is dropped in air that experiences no air resistance.
-Freely falling objects will fall with same acceleration due to the force of gravity and thus the object falls faster and faster as the speed increases, the net force acting on the objects is weight, their weight-to-mass ratios are always the same, their acceleration is g which is as a result of the force of gravity.