Which of the following is not a phase change? melting of snow evaporation of water from the ocean condensation of water vapor to form clouds hydrogen and oxygen gas combining to form water vapor

Classify the following reactions: HNO3 (aq) + NH3 (aq) →NH4NO3 (aq) + H2O (l) 2Cu (s) + O2 (g) →2CuO (s) NaCl (aq) + AgNO3 (aq) →NaNO3 (aq) + AgCl (s) 2LiOH (aq) + H2SO4 (aq) →Li2SO4 (aq) + 2H2O (l) CaCl2 (aq) + K2CO3 (aq) →2KCl (aq) + CaCO3 (s)

Mrs. zerlinsky wrote a chemical equation on the board and asked her class what should be changed to make it correct. she wrote: water glucose → carbon dioxide oxygen energy what should be changed to show the correct chemical reaction?

How many different types of atoms are there in the molecule below? MgCO3

If 4 moles of gas are added to a container that already holds one mole of

If you pour out some of the water in a bucket, does the density of the remaining water change? explain.

How many grams of methane, CH4 are produced from the complete reaction of 5.15 moles of carbon monoxide, CO

If you change the state of something, say, liquid to solid, is it a physical or chemical change?

What type of calorimeter would be best to use if you wanted to measure the heat that is released when gasoline is burned?

Tina has a sample of gaseous water at a temperature of 400 C and a pressure of 4 atm. If Tina increases the pressure to 200 atm, will the gaseous water liquefy? Why or why not?

Label the molecular shape around each of the central atoms in the amino acid glycine. hint