g Consider the balanced equation: 2 N2H4 (g) N2O4 (g) --> 3 N2(g) 4 H2O(g) How many moles of H2O would form if 9.75 moles of N2H4 completely react

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )

Write the balanced equation for a reaction between aqueous nitric acid (hno3) and solid lithium metal (this is a single replacement reaction)

Which of the following is an indication that a substance has undergone a chemical change? a. no new product has been formed. b. the color of the substance has not changed. c. the original constitute has not changed. d. the molecular structure has changed.