Answer:
Option B
Explanation:
When water changes its state, there will be no change in mass because mass is neither created nor it can be destroyed
When water changes its state, there will be no change in composition as well because composition change occurs when there is a chemical reaction and thus change in physical state does not affect its composition
When mass does not change, there will be no change in weight because weight = mass × acceleration due to gravity
As acceleration due to gravity does not change, therefore if mass does not change, there will be no change in weight
Density changes when there is a change in physical state because volume changes as there is a change in physical state and mass remains same
Answer:
The characteristics of the nucleus consists of nucleons protons and neutrons.Protons and neutrons are made of quarks and held together by the string force generated by gluon exchange between quarks.The nucleus contains the most genes and has mitochondria.
First, calculate for the amount of heat used up for increasing the temperature of ice.
H = mcpdT
H = (18 g)*(2.09 J/g-K)(50 K) = 1881 J
Then, solve for the heat needed to convert the phase of water.
H = (1 mol)(6.01 kJ/mol) = 6.01 kJ = 6010 J
Then, solve for the heat needed to increase again the temperature of water.
H = (18 g)(4.18 J/gK)(70 k)
H = 5266.8 J
The total value is equal to 13157.8 J
Answer: 13157.8 J
