Which of the following equations is not correct because is violates the law of the conservation of mass. o 2KCIO3
2KCI + O2
o 2 Na + 2 H2O 2NaOH + H2
o Zn + 2HCI ZnCl2 + Hz
o 4Fe + 302
2Fe2O3

Problem page gaseous ethane reacts with gaseous oxygen gas to produce gaseous carbon dioxide and gaseous water . if of water is produced from the reaction of of ethane and of oxygen gas, calculate the percent yield of water. be sure your answer has the correct number of significant digits in it.

Agood hypothesis includes which of the following? a: prediction b: data c: uncertainty d: conclusion

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer