Which physical method can be used for obtaining a sample of salt from a small beaker of salt water?

2H2 + O2 + 2H20 If you have 50 grams of hydrogen (H2), how many moles of water (H20) could be produced?

What is the name of the element? Protons: 92 Neutrons: 146 A.) uranium B.) xenon C.) protactinium D.) there is no such element.

What is the rate of a reaction if the value of kis 0.1, [A] is 1 M, and [B] is 2 M? Rate = K[A]2[B]2 A. 1.6 (mol/L) / s B. 0.8 (mol/L) / S C. 0.2 (mol/L) / S D. 0.4 (mol/L) / S

Use the data in the table above to calculate an approximate ΔH∘ in kilojoules for the synthesis of hydrazine from ammonia: 2NH3 (g) + Cl2 (g) ⟶N2H4 (g) + 2HCl (g) Express your answer to two significant figures and include the appropriate units.

Determine the percentage composition (by mass) of oxygen in NH4NO3.

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