Answer:
you did not show me the options so i'm just going to say a few.
Explanation:
global warming
releases carbon dioxide into the air
other harmful chemicals
takes up a lot of space and time
Answer:
melting, freezing, and boiling are physical changes
Explanation:rusting and souring are ex. of chemical, not physical
Answer:
The multiring aromatic hydrocarbons in the coal liquid were hydrogenated to give saturated molecules that contained only one aromatic ring. Of the several organic bases investigated, potassium bis(trimethylsilyl)amide was found to be the most effective catalyst.
Explanation:
Answer: b. False
K+ ions move faster than the Na+ ions through the neuron membranes.
The concentration of Sodium ions outside the cell is very high. The concentration of Potassium ions inside the cells is very high. Leakage channels thus allow sodium ions to move inside the cells and pumps out the Potassium from the cells.
