Why are some amino acids described as essential amino acids?

A) They are the ones most used in the body.

B) They can be stored in the body.

C) They are the only ones needed by the body.

D) They cannot be made by the body.

How can atoms be neutral if they contain charged particles?

What is the movement of thermal energy?

Why do you think that clouds and water vapor act like "insulators" from the sun?

What are multi valent metal ions?

36) Which pair represents two forms of an element in the same phase at STP but with different structures and different properties? A) I2 (s) and I2 (g) B) O2 (g) and O3 (g) C) H2 (g) and Hg (g) D) H2 (s) and H2O ()

What is the word equation for KNO3 = KNO2 + O2

Which of the following is true of mixtures? A) a mixture is a combination of two or more substances in which each substance retains its own properties B) A mixture is composed of a single pure substance C) A mixture must contain multiple compounds

Identify the main source of energy used by most organisms

Write a net ionic equation to show that codeine, c18h21o3n, behaves as a bronsted-lowry base in water.

What is the name of the hybrid orbitals used by chlorine in clf3?