A single atom of an element has 11 protons, 11 electrons, and 12 neutrons. Which element is it? V
Na
Mg
Se

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 percentage composition of carbon in the compound ch4

Suppose you wanted to make 100 grams of water. what is the molar mass of water (h2o)?