A 100.0 mL sample of 0.76 M HCI at 23c was mixed with 100.0 mL of 0.76 NaOH at 23c in a coffee cup calorimeter and the following reaction occurred The temperature of the solution increased and a maximum temperature of 28.2 degrees cleius was recorded. Assume that no heat was lost to the surroundings, the volumes were additive, the specific heat capacity of the solution was 4.184 j/go and the density of the solution was 1.00 g/mL
A) calculate the enathalpy change for the formation of 1.0 mol H2O in this reaction
B) is the reaction endothermic or exothermic
C) was the energy conserved in the process

Ch4 is nonpolar and insoluble in water. since all of the hydrogen atoms are evenly spread around the carbon atom even through the c h bond is polar all the poles cancel each other out.

Which of the following did you identify correctly

The teacher is mostly talking about the distillation of a mixture

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.