Answer: D
A catalyst is a substance that alters the reaction and doesn't involve in the reaction.So if the Manganese was a catalyst the mass would not have decreased,it would just continue aletring the reaction until its used up.
The Manganese is not acting as a catalyst
Answer:
Explanation:
Most of the revolutions of 1848 generally failed due to the conflicting philosophies of the revolutionaries and thus conservatives regained power. These revolutions represent the end of the age of Metternich.
Less developed countries, post-socialist countries, transition, social market economy
Answer:
On 11 December 1941
Explanation:
Four days after the Japanese attack on Pearl Harbor and the United States declaration of war against the Japanese Empire, Nazi Germany declared war against the United States, in response to what was claimed to be a series of provocations by the United States government when the US was still.
...................................................................................................................................................... ..........
