How many moles are in 2.3 grams of phosphorus

round to significant number i got .07 after round it to the significant number lease correct me i'm wrong

Select the correct answer. when carbon dioxide dissolves in water, it sometimes reacts with water to form carbonic acid as in this balanced equation: co2 + h2o → h2co3. if 495 milliliters of carbon dioxide at 25°c and 101.3 kilopascals reacts with excess water, what is the theoretical yield of carbonic acid? use the periodic table and the ideal gas resource a. 0.889 g b. 1.10g c. 1.27g d. 2.02g what's the answer! quick!

What is the mass of 0.46 mol of mgcl2

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)