How many moles are 1.20*10^25 atoms of phosphorous

What causes the trade winds?

The atoms of a certain element each contain 11 protons and 1 valence electron. Describe this element and its reactivity

What is the molar mass of a molecule that contains one sodium atom, one oxygen atom, and one hydrogen atom?

When an erythrocyte is removed from circulation the iron ion of hemoglobin?

Express 250,000 mL in liters. A) 0.25 L B) 2,500 L C) 25 L D) 250 L

Why do the chemical properties cycle through each period? Every eighth element starting with hydrogen restarts the transition from metal to inert gas. Elements with atomic numbers which are multiples of eight start a new period.

Which statement correctly describes the Ka of a weak acid? The Ka is large, and the equilibrium favors products. The Ka is large, and the equilibrium favors reactants. The Ka is small, and the equilibrium favors products.

True or False? The fatal 1930 incident in Muese Valley, Belgium, was associated with leakage of toxic chemicals from a former dump site.

How many moles of neon (Ne, 20.179 g/mol) are in 68.4 grams of neon

A 50.00 mL sample of groundwater is titrated with 0.0300 M EDTA. Of 12.40 mL of EDTA is required to titrate the 50.00 mL sample, what is the hardness of the groundwater in molarity and in parts per million of CaCO 3 by mass