All of the following are chemical change except a) souring milk.

B) solution of sugar water

C) rusting iron

D) tarnishing of silver

How can one tell how much of each reactant will be used in a reaction?

The mass of a eraser

If it takes one second to count two rice grains, calculate the time in years required to count a mole of rice grainrg.

If a housing boom occurs in the United States, the demand for carpenters will likely A. decrease. B. greatly decrease. C. stay the same. D. increase.

What would happen if you put two cups of water and add 1 tablespoon of sugar and a table spoon of black pepper?

If I have 325 mL of oxygen gas at a temperature of 25°C, and I heat it to a temperature of 75°C, what is the new volume (in mL) ?

C5H8 + _02 = 8h2o+5co2

Which statement about enzymes is true? They are large molecules that decrease the rate of reactions in the body. They are large molecules that increase the rate of biologicallyimportant reactions. They slow the rate of chemical reactions.

How many seconds are you in school every week?

A student decreases the temperature of a 417 cm³ balloon from 278 K to 231 K. Assuming constant pressure, what should the new volume of the balloon be? 376 cm³ 417 cm³ 462 cm³ 924 cm³