The potential energy is 4.10 J
Explanation:
The potential energy of a body is given by
where
m is the mass of the object
g is the acceleration of gravity
h is the height of the object relative to the ground
For the lemming in this problem we have
m = 0.078 kg is its mass
h = 5.36 m is the height above the ground
is the acceleration of gravity
Solving the equation,
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Answer:
Explanation:
<h3>a.</h3>We know that 3.20 grams of salt in 9.10 grams of water gives us a saturated solution at 25°C. To find how many grams of salt will gives us a saturated solution in 100 grams of water at the same temperature, we can use the rule of three.
Working it a little this gives us :
So, the solubility of the salt is 35.16 (g/100 g of water).
<h3>b.</h3>Using the rule of three, we got:
Working it a little this gives us :
So, it would take 71.09 grams of water to dissolve 25 grams of salt.
<h3>C.</h3>Using the rule of three, we got that for 15.0 grams of water the salt dissolved will be:
Working it a little this gives us :
This is the salt dissolved
The percentage of salt dissolved is: