A new statue of the town founder is erected in the park. At the unveiling, the statue is a orange-brown copper. After a year, the statue looks blue-green. Has a physical or chemical change taken place?

You are doing research on a scientific topic. What is the best way to show relationships between information, particularly numerical data? tables charts and graphs text explanation tally marks

What does the word estimate mean

Which of the following molecules has one lone pair of electrons? a. ch4 b. hcl c. h2o d. nh3

If the reaction is at dynamic equilibrium at 500 K, which statement applies to the given chemical system? The forward and reverse reactions no longer occur. The rates of the forward and reverse reactions are unequal.

3.) A 208 g sample of sodium-24 decays to 13.0 g of sodium-24 within 60.0 hours. What is the half-life of this radioactive isotope? 121 in 10 day how long will it take a 50.00 g sample t

It's Peggy Sue's birthday and she's about to blow out the candles on her cake. Brother Roger stops the party when he shouts: "Look at that! Chemical and physical changes taking places on your birthday cake!

When aluminum, Al, metal is dipped in an aqueous solution of hydrochloric acid, HCl, hydrogen gas, H2, is produced with the formation of an aluminum chloride, AlCl3, solution.

What are the advantages of using solar energy

Which of the following has the highest critical temperature? H2 N2 NH3 H2O

Are there any good tips for organic chemistry reactions?