2) el plomo (pb) tiene de número atómico (z) 82 y de número másico (a) 207. las partículas del
átomo neutro son:
a. número de protones
b. número de electrones
c. número de neutrones

Which of these properties, used alone, would be least useful in identifying most minerals? a. color b. luster c. streak d. density

If 34.2 grams of lithium react with excess water, how many liters of hydrogen gas can be produced at 299 kelvin and 1.21 atmospheres? 2 li (s) + 2 h2o (l) yields 2 lioh (aq) + h2 (g)

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!