QUICK PLEASE List as many PROPER and IMPROPER lab procedures as you can in this picture.

Proper: Lab coat, protection, gloves, tied shoes, pants that cover the whole legs

Improper: The clothing does not cover his whole arms, experiments that are hazardous must be done using a fume hood, labratorical mask  (see the fumes?), flasks being put on the corner of the table (risky for tipping over)

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.

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 :