MnSO4.h2o + h2c2o4 + 2h2o gives
mnc2o4.3h2o + h2so4
For R-CO(NH3)2 compare rotational barrier in liquid and gas phase
The C-N bond rotational barriers for amides are lower in gas phase because solvent effect takes place in the solvent medium and increases hindrance to rotation. Read more on this link :http://www.mhhe.com/physsci/chemistry/carey5e/Ch08/ch8-8.html
To high-purity silicon is added arsenic atoms. Is this material n-type or p-type
Arsenic is a Group VA element and, therefore, will act as a donor in silicon, which means that this material is n-type.