What is always true of a combustion reaction?

carbon dioxide will be produced

the reaction absorbs energy

oxygen gas must be one of the reactants

one reactant must contain carbon

What are the two parts of an atom?

What is the [h+] if the ph of a solution is 1.65? [H+] = [?] x 10^? answer [?] EDIT: The answer is [h+] = 2.24 x 10^-2

The table below shows the electronegativity values of various elements on the periodic table. electronegativities which pair of atoms would form a covalent bond?

What is the maximum mass of s8 that can be produced by combining 87.0 g of each reactant? 8so2+16h2s=3s8+16h20?

Why different fuels are used in different vehicles?

If the heat released during condensation goes only to warming the iron block, what is the final temperature (in ∘C∘C) of the iron block? (Assume a constant enthalpy of vaporization for water of 44.0 kJ/molkJ/mol.)

Which of the following is not a disaccharide? A) sucrose B) maltose C) lactose D) amylose E) all of the above are disaccarides

The process by which a semipermeable membrane allows water molecules, small molecules, and ions to pass through while retaining large particles

Ice melting, water boiling, lighting a match, grape juice freezing. Which statement describes evidence of a chemical reaction

An ion from a given element has 22 protons and 18 electrons. what is the charge on the ion?