What do elements in the same group have? the same atomic mass the same number of electron shells similar properties similar atomic numbers

What keeps an inflated balloon from falling down?

If 200 grams of glucose is converted what will the total mass of ethanol and carbon dioxide be

What is the mass of a nitrogen dioxide molecule?

If the alum reaction was done starting with 12.000 g of al, how many moles of hydrogen gas would be produced according to the balanced equation?

Which of the following processes would you predict to have a positive value for ΔSºreaction? A. 2SO2 (g) + O2 (g) → 2 SO3 (g) B. P4O10 (s) + 6H2O (l) → 4H3PO4 (s) C. 2POCl3 (g) → 2PCl3 (g) + O2 (g) D. 2H2 (g) + O2 (g) → 2H2O (l)

Which type of rock (metamorphic, sedimentary, igneous) can you find fossils in?

What is the chemical formula for water

For a reaction in which a diatomic molecule dis - sociates into atoms, what are the signs of ΔS and ΔH? Explain your answer. You may use the reaction N2 (g) ⎯→ 2N (g) as an example of such a reaction.

Which element is presented in all organic compounds

Which of these traits does not cause a change in the reaction rate? A. density B. temperature C. concentration D. particle size