when 102.4 grams of sodium produces calcium by reacting with calcuim iodide the reaction also produces sodium iodide. How many atoms of calcium will be formed?

Pure substances and solutions are alike because they: are both homogeneous can both be homogeneous or heterogeneous are both heterogeneous are both types of mixtures

General properties of matter include all but which of the following. a. Mass b. Color c. Volume d. Denstiy

Scientists created the first geologic column by determining the relative ages of sedimentary rock in A) one chosen area B) the area where life began C) North America D) areas all over the world

When light strikes a transparent material, most of the light is absorbed or reflected. a. true b. false Is it B?

Surface tension and viscosity are used to describe. (circle one) a. solids b. liquids c. gases

What is the function of the ribosome

How much energy, in joules, does 150.0 g of water with an initial temperature of 25 C need to absorb be raised to a final temperature of 75 C

What mass of oxygen is contained in a 5.8 g sample of NaHCO3?

Which statement correctly compares the number of chromosomes in a body cell to that in a sex cell of humans? A. A body cell has 21 chromosomes; a sex cell has 23 B. A body cell has 21 chromosomes; a sex cell has two C.

Halocarbons contain carbon, hydrogen, and atoms from which set of elements? 1. lithium, sodium, and potassium 2. nitrogen, oxygen, phosphorus, and sulfur 3. nitrogen, oxygen, and fluorine 4. fluorine, chlorine, bromine, and iodine