There are three major states which any given type of matter can exist they are solid liquid and gas true or false

In the following reaction, when a surplus of hydrazine (N2H4) reacts with 20 liters of hydrogen peroxide (H2O2), how many liters of nitrogen gas will be released, given that both gases are at STP? N2H4 + 2H2O2 →N2 + 4H2O 10 liters 0.

Which of the following results in a chemical change in matter building a strong braiding hair or boiling water or Burning wood

10. How do substances change after a chemical reaction? cal A They lose mass. B Their atoms are rearranged. C Their atoms lose electrons. D They change phase.

What can be added to water to make it evaporate occur faster (e. g. sand)

Select one metal which will displace Sn from a compound and form metallic tin (Sn). Cu, Cr, Hg, Ag

Ionic compounds are formed by the ... of electrons? by the what?

What is it called when energy is created without oxygen?

If 21.3 grams of lithium react with excess water, how many liters of hydrogen gas can be produced at 297 Kelvin and 1.40 atmospheres? Show all of the work used to solve this problem. 2Li (s) + 2H2O (l) - > 2LiOH (aq) + H2 (g)

How did coroners handle their responsibilities in the early 1900s? Why was there a need for significant change in the job?

Which of the following is the best indication that a chemical change has taken place? a. The matter changes color. b. A mixture separates into layers. c. The change is reversible. d. The shape of the substance changes.