What type of reaction is this? Zn + K2 CrO 4 --> K + ZnCro4

A) single replacement
B) double replacement
C) decomposition
D) synthesis

There are main groups in the modern periodic table of elements

Ican determine the molar mass of an element by looking on the under the atomic mass for the element. for example the molar mass of phosphorus is 30.974 grams/mole. avogadro’s number tells me the amount of representative particles in 1 mole of any substance. this means 12.011 gram sample of carbon and a 32.0 gram sample of sulfur have the same number of atoms.

How many moles of no2 will form when 3.3 moles of cu are reacted with excess hno3?