Question 48

The total mass of the beaker and solution after the salt is dissolved is exactly 554 g.

When 4 g of salt is added to the beaker filled with water, the total mass becomes the original mass of the water plus the mass of the salt. Therefore, the total mass is 550 g + 4 g, which equals 554 g.

A) More than 554 g

This option is incorrect because the addition of 4 g of salt to the initial mass of the water (550 g) results in a total mass of exactly 554 g, not more. There is no additional mass added beyond the 4 g of salt.

B) Exactly 554 g

This option is correct as it accurately represents the total mass after the salt is dissolved. The initial mass of the beaker and water is 550 g, and when 4 g of salt is added, the resulting mass is 554 g.

C) Less than 550 g

This option is incorrect because the total mass cannot be less than 550 g after adding 4 g of salt. The mass can only increase or remain the same, making this option invalid.

D) Between 550 g and 554 g

This option is incorrect as well. The addition of 4 g of salt to the original mass of 550 g results in a total mass of exactly 554 g, not a mass that falls between 550 g and 554 g.

Conclusion

The correct answer is definitively B, as the total mass after dissolving the salt is precisely calculated to be 554 g. All other options fail to accurately reflect the simple addition of mass that occurs when the salt is introduced to the water.