An acid solution was prepared by dissolving 0.767dm3 of hydrogen chloride gas in water at STP to make 0.25dm3 of solution.18cm3 of this solution were enough to neutralize 25cm3 containing 9.864g of the compound YHCO3 per liter of solution. Determine (i)Concentration of the base in g/dm3
(ii)Atomic mass of Y.
(iii)Write the correct formula of the base.

If two atoms are bonded to a central atom with no lone pairs, how will they be arranged

1. explain hydrogen peroxide, h 2 o 2 properties and decomposition reaction. 2. describe how each of the following natural cycles plays a part in earth’s climate system. (a) the water cycle (b) the carbon cycle

Which theory was contradicted by experiments with the photoelectric effect? light spreads out after it passes through a small opening. as soon as light strikes metal, electrons will be ejected. visible light, regardless of color, will cause the ejection of electrons when striking metal. the kinetic energy of ejected electrons depends on the frequency of light that strikes the metal.