Which of the following pairs of formulas have the same empirical and molecular formulas?

a. C2H4O2 and CH20

O b. CH2 and CH4

Oc. C6H6 and CH4

Od. CO2 and SO2

Oxidation Number of fe in fe3o4

How many valence electrons in kr?

Which state of matter has an indefinite volume and takes the shape of its container? Liquid Gas Both liquid and gas

Which situation is an indication that a chemical change has occurred? No color change occurs. A gas is formed. No heat is released. The temperature does not change.

An acidic solution could have a pH of A) 14 B) 10 C) 3 D) 7

Copper (cu) is a transition element used in the making of coins. calculate the mass in grams of 0.0420

In 1864, the Solvay process was developed to make soda ash. One step in the process is represented by the balanced equation below.

A chemist must prepare of aqueous potassium permanganate working solution. He'll do this by pouring out some aqueous potassium permanganate stock solution into a graduated cylinder and diluting it with distilled water.

What is the best name for the molecule below? a compound with 10 total carbons with a double bond and the rest single bonds.

What Word means the gradual change and build up of organisms in an enviroment