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practice: label the reactants, yield, and products of the chemical equations below:

agno3 + h2s → ag2s + 2hno3
al + n2 → 2 aln
h2so4 + nacn → hcn + na2so4
kclo3 → kcl + o2

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)

The lattice enthalpy (formation of ionic solid from ions in the gas phase) for agcl(s) is -916 kj/mol and the hydration enthalpy (dissolution of gaseous ions into water) is -850 kj/mol. how much heat (in joules) is involved in forming 1l of saturated agcl solution (1.8 × 10-4 g / 100 ml water) by dissolving agcl(s)? assume solution volume does not change much upon dissolution. the equations are given below. ag+(g) + cl−(g) æ agcl(s)

Which answer tells the reason the earth’s climate is getting warmer? too many animals are becoming extinct. large glaciers are melting in antarctica. the earth is moving closer to the sun. driving cars gives off gases that trap heat in the atmosphere.