Living things change over time in response to

changes in their environment

cloning

future change

past extinctions

How are gases different from liquids and solids in terms of the distance between the particles?

A compound with formula AL (XF4) 3 contains (unidentified) element X, which is 11.3% by mass of the composition of the substance. What is identity of element X

Living organisms make their own carbon

Which of the following chemical equations violates the law of conservation of mass? A. Ti + 2Cl2 yields TiCl4 B. 2C2H2 + 5O2 yields 4CO2 + 2H2O C. Li2SO4 + 2Ca (NO3) 2 yields 2LiNO3 + 2CaSO4 D, MgSO4 + 2NaOH yields Mg (OH) 2 + Na2SO4

For the following endothermic reaction at equilibrium: Fe2O3 (s) + 3 H2 (g) 2 Fe (s) + 3 H2O (g) Decide if each of the following changes will increase the value of K (T = temperature).

a substance that undergoes a physical change like melting is still the same substance is it true or false

What is a polar molecule

A mixture of He He, N 2 N2, and Ar Ar has a pressure of 22.1 22.1 atm at 28.0 28.0 °C. If the partial pressure of He He is 2475 2475 torr and that of Ar Ar is 1049 1049 mm Hg, what is the partial pressure of N 2 N2?

Oceans make the temperaturs of nearby land more extreme ... True or false

The Greek letter D stands for A. Mass of B. Rate of C. Change in D. Heat stored in