Silicon is in the third period on the periodic table. Which orbital levels do its electrons occupy?

Predict the temperature of the water leaving a condenser

For the following nuclear reaction, what was the beginning radionuclide (X) ? X → 86Rn222 + 2He4

What is a measure of the energy of motion wich you feel as hot or cold

A glacier recedes and exposes bare rock. Which of the following will most likely occur next?

4AI+30 2 > 2AI2O3 What id the chemical reaction?

What kingdom is humans in!

Propane (C3H8) has a molar mass of 132 g/mole. You started out the day with a tank containing 9071 g of propane. At the end of the day, your tank contained 7532 g of propane gas. How many moles of gas did you use?

Why decomposition of ammonium nitrate is a redox reaction?

Two formulas for compounds containing hydrogen and oxygen are H2O and H2O2. Do these formulas represent the same compound? Explain.

My dog made become frightened and cover when he hears loud thunder this is an example of a reaction to What kind of stimuli A. chemicals B. light C. touch D. sound