If you combine 270.0 ml of water at 25.00 â°c and 100.0 ml of water at 95.0 â°c, what is the final temperature of the mixture? use 1.00 g/ml as the density of water.

43.92 °C.

Explanation:

If we combine warm water with cold one, the heat will transfer from the hot water to the cold until reaching an equilibrium temperature.

The amount of heat released by hot water = the amount of heat absorbed by cold water.

The amount of heat released to or absorbed by water (Q) = m.c.ΔT.

where, Q is the amount of heat released to or absorbed by water.

m is the mass of water.

c is the specific heat capacity of water (c = 4.186 J/g.°C).

ΔT is the temperature difference (final T - initial T).

Since, d of water = 1.00 g/mL.

the mass of cold water at 25.0 °C = d.V = (1.00 g/mL)(270.0 mL) = 270.0 g.

the mass of warm water at 95.0 °C = d.V = (1.00 g/mL)(100.0 mL) = 100.0 g.

Q released by warm water = Q absorbed by cold water.

- (m.c.ΔT)released by warm water = (m.c.ΔT)absorbed by cold water.

Since c is the same so,

- (m.ΔT)released by warm water = (m.ΔT)absorbed by cold water.

- [(100 g)(final T - 95.0 °C)] = (270 g)(final T - 25.0 °C).

- 100 final T + 9500 = 270 final T - 6750.

270 final T + 100 final T = 9500 + 6750

370 final T = 16250.

∴ final T = 16250/370 = 43.92 °C.

Mass is the amount of matter in an object.  weight is the measurement of the pull of gravity on an object.  say for example, you travel to the moon which has a different gravitational field compared to the gravitational field of earth. (gravitational fields: earth = 1, moon = 0.165)  now when you are on the moon, the pull of gravity on you is different than on the earth. and as weight is the measurement of the pull of gravity on an object, that means yes, your weight can and will change on the moon.  however, on the moon, on earth or even on jupiter, the amount of mass inside of you remains the same. meaning your physical mass remains constant.  in conclusion it is possible for your weight to change as your mass remains constant. 

Maybe you should get some from your teacher and learn more so you can get your grades up and maybe study a bit more