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Explain why the enthalpy of lattice dissociation of potassium oxide is less endothermic than that of sodium oxide.

Lattice dissociation enthalpy is the enthalpy change when one mole of a gaseous ionic lattice dissociates into isolated gaseous ions. The process is endothermic because energy is required to overcome the ele...
LJ
Answered by Louise J. • Chemistry tutor
27648 Views

How Do I Integrate cos(x) and sin(x) with higher powers?

The answer to this question depends on one thing, whether this power is odd or even. For even powers we use the identity cos(2x) = 2cos^2(x)-1 = 1-2sin^2(x). So for example, the integral of cos^2(x) is found...
CR
Answered by Ciarán R. • Maths tutor
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Why is the pancreas both an endocrine and exocrine gland?

Endocrine organs release their products (usually hormones) directly into the blood. The pancreas contains islets of Langerhans which are made up of alpha and beta cells. Beta cells secrete insulin and alpha ...
RC
Answered by Rym C. • Biology tutor
41623 Views

differentiate: y^2 + 3xy + x + y = 8

dy/dx = 3x+1/ -2y-3x-1
GF
Answered by Gabrielle F. • Maths tutor
4892 Views

"why has the amount of antibiotics in animal feeds gone down in recent times"

. increase in the number of cases of antibiotic resistance . increase in risk of horizontal gene transfer of resistance . resistant bacteria causes harm/ ineffective medical treatments . reduces risk of/ red...
WT
Answered by William T. • Biology tutor
3016 Views