Na2SiO3 (s) + 8 HF (aq) H2SiF6 (aq) + 2 NaF(aq) + 3H2O (l) 1. How many moles of HF are need to react with 0.600 mol of Na2SiO3?

2. How many grams of NaF form when 0.800 mol of HF reacts with excess Na2SiO3?

3. How many grams of Na2SiO3 can react with 0.900 g of HF?

Which statement correctly describes metallic bonds? a. they form when certain atoms lose electrons and other atoms gain electrons. b. they involve an attraction between anions and cations. they always involvpoth a metal and a nonmetal. d. they can only form between atoms of the same element. e. they form because electrons can move freely between atoms.

Asample of freon gas has a volume of 2.23 liters, a pressure of 4.85 kpa, and a temperature of -1.36°c. calculate the volume at a pressure of 1.38 kpa and a temperature of 5.5°c. (show work)

Areader can tell that the meaning of “obnoxious” will include “having the quality of something” because of the .a) prefix b)pronunciation c)suffix d) word root