Chemistry Answers

Are ionization energy and electron affinity the same phenomenon

At 2.50 g of SF6 is introduced into an evacuated 5-L container at 83 ºC, what pressure in atmospheres is developed?

The equilibrium constant, K_c, for the following reaction is 1.31×10^-2 at 700 K.

NH₄I(s) NH₃(g) + HI(g)

Calculate K_c at this temperature for the following reaction:

NH₃(g) + HI(g) NH₄I(s)

K_c = 

Calculate the wavelength of a particle with masses 9.11x10-31Kg travelling at speed 1.0x107 m/s and that of a ball of mass 0.1Kg travelling at 35 m/s. Comment on the significance of the wavelengths calculated.

A new element has been discovered and all you know is that it is a noble gas Predict the number of electrons in its outer orbit and possible atomic number(s)

A new element has been discovered and all you know is that it is a halogen Predict the number of electrons in its outer orbit and possible atomic number(s)

how many moles of sodium are needed to react with sulfic acid to produce 3.75 moles of sodium according to the following unbalanced reaction

Na+ H2(SO4)> Na2 (SO4)+H2

How to find wavelength with Mass given

Determine the average rate of decomposition of H

3

PO

4

H3PO4 between 10.0 and 40.0 s

s.

Consider a solution initially containing 0.40 mol fluoride anion and 0.30 mol of hydrogen fluoride (HF). What is the pH after addition of 0.20 mol of HCl to this solution? (HF, Ka = 7.2 × 10(–4))?