Question 17(Multiple Choice Worth 2 points) A scientist measures the rate of a reaction between two liquids. Then, he performs the reaction again, adding solid manganese. The reaction takes place more
quickly the second time. The mass of the manganese decreased by 0.45 grams during the reaction. He claims that the manganese acted as a catalyst because
sped up the reaction. Is the scientist correct? Why or why not?
Yes, because the reaction happened more quickly with the manganese.
Yes, because the manganese was a solid, and all solids are catalysts.
No, because manganese is a metal, and metals cannot be catalysts
No, because some manganese was used during the reaction, and catalysts are not used up.

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

i believe the answer is:

-   william jennings bryan is a democrat while mckinley was a republican

at that time, the segment of population that choose for democratic party were the voters with low economic background and vice versa

- william jennings has support of populists and wants to have inflation to farmers while mckinley has support of bankers and businessmen , doesn't want inflation

the fixed value of gold make the large business able to stack up their gold without   being worried that it would devaluated.

- william jennings supported the silver standard while mckinley supported the gold standard

according to jenning, using other metal beside gold could the poor people to have more purchasing power and them advance in the society.

the following best describes postwar era writers in their works:

many writers,authors,novelists,poets concentrated more on social art and social writing and stayed away from political writings.