Which element is a metalloid?
a. argon (ar)
b. silicon (si)
c. potassium (k)
d. magnesium (mg)?

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!

Explanation for basic character?

Which of the following would be an accurate picture of the earth during the summer time of the northern hemisphere?