Column A

Question

1.
20g of NaCl at 50°C:
20g of NaCl at 50°C
2.
45g KCl at 60°C:
45g KCl at 60°C
3.
70g of CaCl2 at 10°C:
70g of CaCl2 at 10°C
Column B
a.saturated
b.supersaturated
c.unsaturated
Question 24
Which scenario best demonstrates an example of Newton's first law of motion?

a
A car passenger moves forward when a car suddenly stops.
b
A shopping cart accelerates when it is pushed.
c
A rocket lifts off from a launch pad.
d
A man pushes a canoe off the shore and into the water.

Answer 1

For the first part regarding the solubility scenarios:

• 20g of NaCl at 50°C: This would most likely fall under c. unsaturated as NaCl is highly soluble in water and 20g is unlikely to reach saturation at 50°C.

• 45g KCl at 60°C: Similar to NaCl, KCl is also quite soluble in water, and c. unsaturated could be the most accurate description assuming that the amount does not exceed solubility limits at that temperature.

• 70g of CaCl2 at 10°C: Calcium chloride is very soluble and while 70g might seem high, at lower temperatures, it could still be c. unsaturated. However, if there are solubility limits defined for this scenario that this amount is above, it could potentially lean toward a. saturated.

Now for Question 24 regarding Newton's first law of motion:

The option that best demonstrates an example of Newton's first law of motion is:

a. A car passenger moves forward when a car suddenly stops.

This scenario illustrates inertia, where the passenger continues in motion due to his inertia as the car comes to an abrupt stop.