Which equations are balanced? Select four options.

-Mg3N2 + H2O → 3MgO + 2NH3
-C3H8 + 5O2 → 4H2O + 3CO2
-Zn + 2HCl → ZnCl2 + H2
-3Ca(OH)2 + 2H3PO4 → Ca3(PO4)2 + 6H2O
-3H2SO4 + 2Fe → Fe2(SO4)3 + H2
-4Al + 3O2 → 2Al2O3

Water flows at a steady rate from a tap. its takes 40 seconds to fill a 4 litre watering can from the tap. the rate at which water flows from the tap is halved. complete: 4 litres into cm3

Given ab and cb are tangents of p, and m =10°. what is the measure of abp?

Which questions would most a reader identify the author's purpose for writing? check all that apply. what type of text is this? what type of reviews did the book receive? how many copies of the book have been sold? what is the central idea? how does this text make one feel?