Calculate the mass of nacl needed to make 40% solution from 3kg of water ? could you explain step by step : -)

List four observations that indicate that a chemical reaction may be taking place

Provide a stepwise curved arrow mechanism that fully explains the outcome of the reaction shown below. oh нао* heat он

Main expenses you plan on making payments on a new car too. you want to spend 15% of your monthly net pay on the car payment, insurance, registration, and taxes combined. what is your monthly car allowance? $149.46 $298.91 $448.37 $597.83