Which of the following is not example of chemical change

A candle burning

B cake baking

C glass breaking

D a nail rusting

Which solution contains phenolphthalein pink?

The atomic radii of a divalent cation and a monovalent anion are 0.065 nm and 0.126 nm, respectively. (a) Calculate the force of attraction between these two ions at their equilibrium interionic separation (i. e.

Salt dissolving in water is a physical change. True or False

What is the mass of 125 mL gaseous chlorine, density = 3.16 g/L?

Balance the following equation: Ni (CIO), → Nici, + 0 When the equation is properly balanced, the correct coefficients are, respectively

The mass of 1 mol of chromium (atomic mass 51.996 amu) is

Which of the following elements will tend to form a cation? A. Oxygen B. Nitrogen C. Sulfur D. Lead E. All of the Above

Is pure orange juice a solution or a suspension

If a catalyst is used in a reaction: a. the energy of activation increases. b. the reaction rate does not change. c. the reaction rate increases. d. the equilibrium shifts.

Methanol (CH3OH) is produced commercially by the catalyzed reaction of carbon monoxide and hydrogen: CO (g) + 2H2 (g) ⇌CH3OH (g). An equilibrium mixture in a 1.50 L vessel is found to contain 0.0679 mol CH3OH, 0.160 mol CO, and 0.302 mol H2 at 500 K.