Based on their chemical formulas, which of these common substances is an element?
A. Bleach (NaClo)
B. Silver (Ag)
C. Quartz (SIO2)
D. Marble (CaCO3)

If 34.2 grams of lithium react with excess water, how many liters of hydrogen gas can be produced at 299 kelvin and 1.21 atmospheres? 2 li (s) + 2 h2o (l) yields 2 lioh (aq) + h2 (g)

All cells are made of four types of acids, lipids, proteins, and carbohydrates.

An object becomes electrically charged when: electrons are created in it electrons from it are destroyed electrons are transferred to it protons from it are destroyed protons are created in it