georgina

how to calculate delta h for the reaction 2B(s)+3H2(g)arrow B2H6(g)given the following data: 2B(s)+3/2O2(g)arrowB2O3(s) deltaH=-1273kj B2H6(g)+3O2(g)arrowB2O3(s)+3H2O(g) deltaH=-2035kj H2(g)+1/2O2(g)arrowH2O(l) deltaH=-286kj H2O(l)arrowH2O(g) deltaH=+44kj

Which of the following defines the probability of an event A, or P(A)? The probability of A equals 0.50. The probability of A equals the number of possible outcomes in the sample space divided by the number of outcomes favorable to A. The probability of A...

two forces of magnitudes 7N and 9N act at an angle alpha such that sin alpha=0.4. Find the magnitudes of the two possible resultants

what is the weight in kg and height in cm for a patient who weighs 130 ponds and is 5ft 7 inches tall?

the height of a parallelogram is 4.5cm.the base is twice the height.what is the area