H. Study the chemical equation below and answer the questions that follow. Na2CO3 (aq) + H2SO4 (aq) → Na2SO4 (aq) + CO2(g) + H20 (1)
What volume of 0.5 mol L sulphuric acid is needed to react with 21.2 g of Na2CO3 (molar mass
of Na2CO, is 105.99)?
i.​

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.

Use the periodic table to find the molar mass of each element. molar mass h = g/mol molar mass s = g/mol molar mass o = g/mol

Which is an example of a highly unstable isotope that is often used in fission reactions?