A calcium atom has 20 electrons . Electrons in the sub shell experience the lowest effective nuclear charge A . 1s
B. 2p
C. 3D
D. 4s

What type of reaction is zn + cucl2 → cu + zncl2?

Phosphorous acid, h3po3(aq) , is a diprotic oxyacid that is an important compound in industry and agriculture. the values of phosphorous acid are 1.30 6.70 calculate the ph for each of the given points in the titration of 50.0 ml of 1.5 m h3po3(aq) with 1.5 m koh(aq) .

Needthe meter is the standard unit for: 1) height 2) length 3) weight 4) mass