Inorganic Chemistry Answers

A solution is prepared by dissolving 4.40 g of KSCN in enough water to make 250 mL of solution. What is the concentration of the solution?

Hi! I have a question about Lattice Energy (enthalpy)

I know that when making a bond the reaction is exothermic (positive)
and breaking a bond the reaction is endothermic (negative).

Lattice enthalpy or lattice formation enthalpy is defined as the enthalpy of formation of 1 mole of an ionic compound from gaseous ions under standard conditions, which is endothermic (negative).

My question is ..
Why lattice formation is negative? It should be positive when making the ionic lattice because we are releasing energy.

Is bond making/breaking different than lattice making/breaking?

Calculate the ionisation energy of rubidium per atom, if light of wavelength 5.84  108 m produces electrons with a speed of 2.450x106 m/s

What is the enthalpy change when one mole of crystal lattice is formed from the isolated gaseous ions?

(A)What would be the calculated magnetic moment of [Ni(H2O)6]2+ ?
(b) What kind of metals are extracted by electrometallurgy? Give an example.
(c) In the later actinides, why does the +3 state become predominent?
(d) What is YAG and what are its uses?

What is the molar mass and atomic mass of M if Cl contains 37.38mg of the compound MCl4 of 50.00mg

A weak acid HA has Ka=10^-6. What would be the molar ratio of this acid and its salt with strong base so that the pH of the buffer solution is 5?

What can not affect electron affinity

milk of magnesia is sometimes used as a remedy for an acid stomach. would you expect the pH of milk of magnesia to be less than 7, more than 7, or 7? why?

how many grams of ammonia will be obtained from 40 g of nitrogen and excess of hydrogen , if the percent yield is 87% ?