Which reaction is exothermic? ch4 + 2o2 mc016-1.jpg co2 + 2h2o + 891 kj nh4no3 + h2o + 25 kj mc016-2.jpg nh4+(aq) + no3-(aq) 2h2o + 286 kj mc016-3.jpg 2h2 + o2 n2 + o2 + 181 kj mc016-4.jpg 2no

What is the percent by mass of magnesium sulfate in mgso4.7h2o

What are the advantages of using the metric system? designed as a decimal system making conversions simpler more accurate system of measurement has prefixes that correspond to an amount to use with all base units used by the entire scientific community

Idid a lab for chemistry where we put nails in a copper (ii) chloride solution. 1. why did the reaction stop? which reactant was used up? how do you know? 2. describe what was happening to the atoms of iron and copper during the reaction. what is this type of reaction called? 3. what would happen to the ratio of copper to iron if you had placed more nails in the beaker? if you had let the reaction go for less time? 4. what is the accepted ratio of copper atoms to iron atoms in this reaction? account for differences between your experimental value and the accepted value. write the balanced equation for the reaction.