To answer this question use the hydrazine-nitrogen tetroxide rocket fuel reaction: 2n2h4 + n2o4 = 3n2 + 4h2o. how many moles of n2h4 are needed to react with 4 moles of n2o4 a) 4 moles b) 2 moles c) 8 moles d) 6 moles

Define dew point. i am writing this part to be able to ask the question

15. which of the following is not human-caused groundwater pollution? a. water in an aquifer dissolves elements such as arsenic and mercury from surrounding rock. b. water in an aquifer is contaminated by leachate that seeps into the ground from a landfill. c. water in an aquifer becomes polluted with chemicals used in hydraulic fracturing, or fracking. d. water in an aquifer absorbs harmful bacteria from the drainage field of a septic tank.

Citric acid has a ph between 1 and 3.  it is considered to be aa. weak acidb. weak basec. strong based. strong acid