Given: na2sio3 (s) + hf(aq) h2sif6 (aq) + 2 naf (aq) + 3 h2o (i). how many moles of hf are needed to react with 0.9300 mol of na2si03

practical process described pest part of scientific investigation.

because practical knowledge is powerful then therotical knowledge.

i don't see a text, but i am gonna assume this *orbit* the curved path, usually elliptical, described by a planet, satellite, spaceship, etc., around a celestial body, as the sun.

since electrons are negative the answer is neagtaive