The student investigated the temperature change when different masses of sodium carbonate were added to 50 cm3 of water at 20 °C.
Table 2 below shows the results.
Mass of sodium carbonate in g
2.0
4.0
6.0
8.0
10.0
12.0
14.0
Final temperature of solution in °C
21.5
23.0
24,5
26.0
26.6
26.6
26.6
Describe the relationship between the mass of sodium carbonate added and the final
temperature of the solution.
Use values from Table 2 in your answer. D
(3 Points)

in chemistry, a solution’s concentration is how much of a dissolvable substance, known as a solute, is mixed with another substance, called the solvent. the standard formula is c = m/v, where c is the concentration, m is the mass of the solute dissolved, and v is the total volume

what is the question here. i think you messed up.

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.