what is a pure substance made of positive and negative ions in a fixed ratio called (1 point)
a polar molecule
a hydrogen bond
an atom
an ionic compound
3 answers
an ionic compound
A 50 gram glass holds 400 grams of liquid water and 75 grams of ice. After 20 minutes the mass of ice is 50 grams. Calculate the mass of the liquid water at this point in time using the law of conservation of mass
According to the law of conservation of mass, the total mass of the system should remain constant throughout the process.
Initially, the mass of the glass is 50 grams, the mass of liquid water is 400 grams, and the mass of ice is 75 grams. Thus, the total initial mass is:
50 grams (glass) + 400 grams (liquid water) + 75 grams (ice) = 525 grams
After 20 minutes, the mass of the ice decreased from 75 grams to 50 grams. This means that 25 grams of ice have melted into liquid water.
Therefore, the total mass of the system at this point in time is still:
50 grams (glass) + 400 grams (liquid water) + 50 grams (ice) = 500 grams
To calculate the mass of the liquid water, subtract the mass of the glass and the remaining mass of the ice from the total mass:
500 grams (total mass) - 50 grams (glass) - 50 grams (ice) = 400 grams
Hence, the mass of the liquid water at this point in time is 400 grams.
Initially, the mass of the glass is 50 grams, the mass of liquid water is 400 grams, and the mass of ice is 75 grams. Thus, the total initial mass is:
50 grams (glass) + 400 grams (liquid water) + 75 grams (ice) = 525 grams
After 20 minutes, the mass of the ice decreased from 75 grams to 50 grams. This means that 25 grams of ice have melted into liquid water.
Therefore, the total mass of the system at this point in time is still:
50 grams (glass) + 400 grams (liquid water) + 50 grams (ice) = 500 grams
To calculate the mass of the liquid water, subtract the mass of the glass and the remaining mass of the ice from the total mass:
500 grams (total mass) - 50 grams (glass) - 50 grams (ice) = 400 grams
Hence, the mass of the liquid water at this point in time is 400 grams.