The half-life of carbon14 is 5,730 years. If a fossil is determined to have a carbon-14 amount corresponding to 4 half-lives, what is the approximate age of the fossil?

22,000 years

35,000 years

17,000 years

29,000 years

A compound has a molar mass of 92.02 grams/mole, and its percent composition is 30.4% nitrogen (N) and 69.6% oxygen (O). What is its molecular formula? A. N2O4 B. NO2 C. N2O D. N4O2

Phosphorus is: 1 found free in the atmosphere 2 returned to the soil by rhizobium 3 added to the soil through weathering 4 usually very abundant in an ecosystem

An ion has a charge of 3+. if this ion has 8 protons, how moany electrons does it have? A 3 B 5 C 7 D 8 E 11

Which statement best describes the molecules in a solid? A: Molecules move completely at random and at very high speeds. B: Molecules expand to the edge of their container. C: Molecules vibrate in a fixed position and do not move around much.

What is the molar mass of Aluminum chromate

What is the element Ar classified as in the periodic table?

Two objects, one heavy and one light, travel at one of two speeds. Which will have the most inertia?

Which statements correctly describe water boiling in a pot? Air bubbles from the atmosphere are being absorbed. The water's internal kinetic energy is increasing. The water is gaining internal potential energy. The water's temperature is increasing.

Biofuel is any fuel that is produced from living or once living matter in a short period of time, days, weeks, or even months.

How are revolution and year related