What did early Greeks believe the world was made of

Suppose you use a microspope to look at the skin of an onion. What structure will you see that would not be found in a cell from your skin a. Endoplasmic Reticulum b. Golgi Apparatus c. Cell Wall d. Plasma Membrane

What is the oxidizing agent in the reaction fe + agno3 fe (no3) 3 + ag?

An atom of an element has 28 innermost electrons and 7 outermost electrons. In which period of the Periodic Table is this element located? 1. 5 2. 2 3. 3 4. 4

3. Potassium chlorate, KC103, decomposes when heated to produce potassium chloride and oxygen gas. If 6.50 grams of KClO3 were heated in a test tube, how many grams of oxygen gas should be given off?

A reaction has? h? rxn = - 129 kj and? s? rxn = 301 j/k.

Based on the symmetry of the molecules, which is a polar molecule? SeCl2 (bent) BeCl2 (linear) BF3 (trigonal planar) CF4 (tetrahedral) O2 (diatomic linear)

7) change 21.1 mg into grams

Why is an ionic solution a good conductor of electricity while a covalent solution is a poor conductor

How many grams of zinc metal will react completely with 8.2 liters of 3.5 M HCl? Show all of the work needed to solve this problem. Zn (s) + 2 HCl (aq) ZnCl2 (aq) + H2 (g)

The notation for the nuclide 13755Cs gives information about (1) mass number, only (2) atomic number. only (3) both mass number and atomic number (4) neither mass number nor atomic number