What is the percent by mass of oxygen in carbon dioxide (CO2) ?

27.29%

57.12%

72.71%

79.99%

How many core electrons does argon have?

In a balanced chemical reaction, the total mass of the products always equals the a. molar mass of the reactants. c. total mass of the reactants. b. atomic mass of the reactants. d. proportional masses of the reactants.

A solution has [oh-] = 4.0*10-8. what is the value of [h+] for the solution? answers

For the reaction: CH3I + Cl - → CH3Cl + I- What is the change in enthalpy for the reaction, ΔrH, in units of kcal/mol? Provide your answer to the nearest 0.1 kcal/mol.

A mole of any atom or molecule has the same number of?

What is the molarity of a solution made with 298g of potassium chloride dissolved in enough water to make 2L of solution?

Why is mass conserved in a chemical change? The energy used in the chemical reaction burns up the extra matter. The compounds are still exactly the same, they just look different.

Where the use of energy is concerned (in scientific sense), when is work done?

Properties of a solution that depend only on the ratio of the number of particles of solute and solvent in the solution are known as: intensive properties extensive properties colligative properties chemical properties

What type of chemical bond can form between an atom with 11 protons and an atom with 17 protons? what type of chemical bond can form between an atom with 11 protons and an atom with 17 protons? non-polar covalent ionic hydrogen polar covalent?