Which is not a possible clue that a chemical change has occurred?

A. The color changes.

B. The substance melts.

If water were a nonpolar molecule, how would its properties be different?

What is the theoretical yield of Na2SO4, in grams?

What does conserving mass mean in a chemical equation A. There are more of each type of atom on the reactant side than on the product side. B. There is equal number of each type of atom on the reactant and product side. C.

A 3.0 mole sample of KBrOz was decomposed according to the following equation. How many moles of O2 are formed? * 2KBrO3 → 2KBr + 302

I'm a chemical formula such as H2O what does a small number next to an element symbol tell you

What will most likely happen when a warmer air mass exists above a polar ice sheet? The temperature of the ice sheet will be lowered. Heat will be transferred from the air mass to the ice. The air mass will exert high pressure and rise upwards.

A 2.00 L sample of gas at 35 C is to be heated at constant pressure until it reaches a volume of 5.25 L. To what Kelvin temperature must this sample be heated?

Of the following reactions, which one produces oxygen gas? Fermentation Anaerobic respiration Aerobic respiration Photosynthesis

Describe the electrodes in this iron-copper galvanic cell.

What happens to wood when it burns?