2HCl + MgS → H2S + MgCl2 If you start with 2 moles of HCl and 1.2 moles of MgS, how many moles of H2S can form?

What is the limited reactant?
What is the excess reactant?
How much product will form?
How much of the excess reactant will remain?

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?

How are isotopes of the same chemical element alike? how are they different?

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?