Amphoteric oxide is: 1) Al2O3? 2) SiO2
13.4 g of a sample of unstable hydrated salt, Na2SO4.xH2
An n-p-n transistor of current gain 80 in common emitter mode gives emitter current equal to 8.1
In a binomial distribution consisting of 5 independent trials, the probability of 1 and 2 success