Mary roller skates 18 miles in 1 1/2 hours what is her average speed in miles per hour

When the equation: __Fe2O3 (s) + __CO (g) → __Fe (l) + __CO2 (g) is correctly balanced using the smallest whole numbers, the coefficient of Fe (l) is

Suppose you found a material in which 12.5% of the original radioactive atoms were present. if the half-life is 47 years, how old is the material?

If something has an atomic number of 13 and an atomic mass of 26.98 how many protons does It have

What is the Bronsted-Lowry definition of an acid? A. a compound that donates protons B. a compound that accepts protons C. a substance that increases hydroxide ion concentration D. a substance that increases hydronium ion concentration

What is the relationship between the internal energy of a substance and its particle movement?

Balance the following redox equation in acidic solution using the smallest integers possible and select the correct coefficient for the H + (aq) ion.

Toussaint L' ouveeture lead a revolt that eventually resulted in Independence for

If a solution contains 1 x 106 hb molecules, how many o2 binding sites are available? if the solution of hb is 50% saturated with o2, how many binding sites are occupied by o2?

A. what are isotopes? b. how are the isotopes of a particular element alike? c. how are they different?

The line of longitude used as the origin in a system of coordinates