50 cm³ of 2.5 Moldovan-3 hydrochloric acid was placed in a polystyrene beaker of negative will heat capacity its temperature was recorded and then 50 cm³ of 2.50 Moldm-3 NaOH at the same temperature was quickly added with string the temperature rose by 17°C the resulting solution may be considered to have specific heat capacity of 4.2 what is an approximate value of the murder enthalpy of neutralisation of hydrochloric acid and sodium hydroxide from this experiment

Electromagnets coils of wire paper clips picked up 10 3 15 6 20 9 25 12 ms. owens' class was studying magnets. ms. owens showed her students how to make an electromagnet using a nail, a d-cell battery, and plastic coated wire. the students wrapped the wire around the nail and then attached the ends to the battery. when they were finished, they tested their magnets by investigating how many paperclips their magnets could pick up. they also tested whether they could increase the strength of their electromagnets by using more coils of wire. they recorded the class average of their results in the data table seen here. ms. owens asked her students to graph their data in a line graph. how should the students label the x-axis on their line graph? a) size of battery b) number of paper clips c) number of coils of wire d) strength of electromagnet