The mixing of which pair of reactants will result in a precipitation reaction? a. ba(no3)2(aq) + na2co3(aq) b. nh4br(aq) + nh4i(aq) c. k2so4(aq) + cu(no3)2(aq) d. naclo4(aq) + (nh4)2s(aq)

A. Ba(NO₃)₂(aq) + Na₂CO₃(aq)

Explanation:

Ba(NO₃)₂(aq) + Na₂CO₃(aq) → BaCO₃(s) + NaNO₃(aq)

indicate valleys, hills, steepness and gentleness of slopes.

explanation:

contour lines on a map indicate elevation, or depth. numeric notations on contour lines refer to the level of elevation, or height about sea level.

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.