1. A compound is made up of 11 percent oxygen and 89 percent gold. What would be this compound's empirical formula?

Empirical formula is Au₂O₃

Explanation:

Given data:

Percentage of oxygen = 11%

Percentage of gold = 89%

Empirical formula = ?

Solution:

Solution:

Number of gram atoms of O = 11 / 16 = 0.69

Number of gram atoms of Au = 89 / 197 = 0.45

Atomic ratio:

                Au               :          O    

           0.45/0.45        :      0.69  /0.45

                    1               :           1.5      

Au  : O = 1 : 1.5

Au  : O = 2( 1 : 1.5)

Empirical formula is Au₂O₃.

each  column  of the  table  is called a group. elements in a group share similar properties. groups are  read  from  top  to  bottom. metal. metalloid. nonmetal. solid. liquid. gas. fe. hg. o.  2. 3. 4. 5. 6. 7. 8. 9.  2. beryllium. 9.012. 4.  sodium. 22.990.  11. 3.  magnesium. 24.305.  12.  potassium. 39.098.  19. 4.  calcium. 40.078.  20. i guess  i  

chemical digestion occurs in the stomach were hcl and pepsin forms chyme, the mouth in which salivary amylase breaks down starch to form bolus, and the small intestine specifically the duodenum.