KCI (S) Cao (s)
SiO2 (s)
Compound
Conductive
CO2 (s)
No
No
No
No
Based on the student's data, can they determine which substances are ionic, and which are covalent?
A. No, as ionic compounds are only conductive in an aqueous (water) solution.
B. Yes, as all of these compounds are ionic since they are not conductive.
C. No, as covalent compounds are only conductive in an aqueous (water) solution.
D. Yes, as all of these compounds are covalent since they are not conductive.

c is the answer because when something is left after something evaporates that shows the chemical change.

answer: the value of enthalpy change will be -152.80 kj.

solution:

pressure = 1atm , temperature = = 298 k

given that pressure and temperature are same in both gases , the number of moles of both gases can be determined by the ideal gas equation.

according to reaction 3 moles no are reacting with 1 mol of ,then 0.49 mol of no will react with moles of ozone that is 0.16 moles of ozone. since, no is limiting reagent and is an excessive reagent.

enthalpy change for the reaction between the given volumes of the gases is :

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer