Prove Lavoisier's law (the law on mass maintenance) for the chemical reaction shown by the equation 4Al +3O2 > 2Al2O3 i need it done by 20 mins plsss​

Margaret wants to make an orange flavored drink by stirring powdered drink mix into a glass of water. she doesn't like drinks that have small clumps of powdered solid in them, so she wants the drink to be a perfect solution. what factors should margaret not consider when deciding how much powder to add to her glass of water?

Word equation for k+ h2o yield koh + h2

Draw any one of the skeletal structures of a 2° alkyl bromide having the molecular formula of c6h13br and two stereogenic centers. indicate chirality by using wedge and hashed wedge notation. lone pairs do not need to be shown.