20 POINTS! (NOTE, WRITE THE NET IONIC REACTION WITH THE SOLUBILITY STATES AND CHARGES, NOT THE MOLECULAR REACTION) . Question is- Write a net ionic equation for the overall reaction that occurs when aqueous solutions of sodium hydroxide and carbonic acid are combined. Assume excess base.

Cobalt-60 is an artificial radioisotope that is produced in a nuclear reactor and is used as a gamma-ray source in the treatment of certain types of cancer. if the wavelength of the gamma radiation from a cobalt-60 source is 1.00 × 10-3 nm, calculate the energy of a photon of this radiation.

Amass of 100.0 g of solute is dissolved in water so that 850. ml of a 0.7500 m solution has been prepared. what is the molar mass of the solute?

The alkali metals (group 1) consist of lithium (3), sodium (11), potassium (19), rubidium (37), cesium (55), and francium (87). they are soft, metallic solids with low densities and low melting points. based on the data shown in figure 1, how many valence electrons do alkali metals share?