What volume of carbon dioxide at STP will be produced when 1.03 mol of HF are reacted with an excess amount of sodium carbonate? Na2CO3 (aq) + 2 HF (aq) → H2O (ℓ) + CO2 (g) + 2 NaF (aq)

Ahypothrticalax type of ceramic material is known to have a density of 2.10 g/cm3 and a unit cell of cubic symmetry with a cell edge length of 0.57 nm. the atomic weights of the a and x elements are 28.5and 30.0 g/mol, respectively. on the basis of this information, which of the following crystal structures is (are) possible for this material: sodium chloride, cesium chloride, or zinc blende

Ethanol (c2h5oh) is produced from the fermentation of sucrose in the presence of enzymes. c12h22o11(aq) + h2o(g) 4 c2h5oh(l) + 4 co2(g) determine the theoretical yield and the percent yields of ethanol if 680. g sucrose undergoes fermentation and 326.5 g ethanol is obtained. theoretical _ g _ percent %

Which of the following are in a chemical family a. ca, sc, k b. cu, ag, au c. so, ge, sb