What are tiny air sacs of the lungs where oxygen and carbon dioxide are

exchanged?

•pharynx

•larynx

•bronchi

•alveoli

Which of the following are potential benefits of wind turbines? (may be more than one answer) A. viable source of power B. creates less pollution C. is expensive to set up D. is a renewable energy source

Which process is most likely responsible for the removal of the missing parts of the rock layers

Does it matter in this problem how many eggs are in a cluckster?

Consider the conversion of succinate to fumarate in the Citric Acid Cycle (reaction below). This reaction is endergonic under standard conditions (ΔGo'≈ 6 kJ/mol).

A 0.450 g0.450 g sample of impure CaCO3 (s) CaCO3 (s) is dissolved in 50.0 mL50.0 mL of 0.150 M HCl (aq) 0.150 M HCl (aq).

What is the molar mass of the following substance : Cs2CO3

What does the velocity of a wave describe

Sulfur (S) has 16 protons and 16 neutrons. How many electron shells does an element of sulfur have?

Which one of the following statements about orbital energies is incorrect? A) The energy of a given orbital increases as the nuclear charge Z increases. B) In many-electron atoms the energy of an orbital depends on both n and l.

When solid lead (II) sulfide ore burns in oxygen gas, the products are solid lead (II) oxide and sulfur dioxide gas.? A. write the balanced equation B. how many grams of oxygen are required to react with 29.9 grams of lead II sulfide? C.