Identify the atom that increases in oxidation number in the following redox reaction. 2MnO2 + 2K2CO3 + O2?2KMnO4 + 2CO2

a. O

b. Mn

c. KD. C

Which is a question which science cannot answer? How does the moon affect tides on earth? How long does it take for the earth to rotate on its axis? When will the next earthquake happen? Why do volcanoes erupt?

An isotope of which element has an atomic number of 6 and a mass number of 14

How many Br - ions are there in 2.51 grams of AlBr3

A sample of coal has the following analysis (wt %). Moisture 1.1%, Fixed Carbon 74%, Volatile Matter 17.9%, Carbon 63.7%, Hydrogen 3.3%, Nitrogen 1.7%, Sulfur 1.7%, Oxygen 10.9% and the rest is ash.

A nurse measures the volume of a drop of medicine. The volume of 1 drop of medicine is 1.39 mL. What is the volume in deciliter of 100 drops of medicine?

When does a spring tide take place? At the beginning of spring Only during the spring season Only after spring is over At any time

The highest cloud are known as

What is the mass of 4.85 X 10^22 atoms of iron (Fe) ?

If element x has 95 protons how many electrons does it have

Which of the following when dissolved in deionized water would make a good conducting solution? a) methanolb) sugarc) baking soda