Which of the following could indicate that a chemical change has taken place?

gas formation

formation of a precipitate

color change

all of the above

52. Classify each compound as ionic or molecular. If it is ionic, determine whether the metal forms only one type of ion or more than one type of ion. (a) CoCl2 (b) CF4 (c) BaSO4 (d) NO

Which processes result in the release of carbon? Check all that apply. A) Animals break down food molecules to obtain energy. B) The remains of producers are broken down by decomposers. C) The remains of consumers are broken down by soil decomposers.

Which of the following interactions can contribute to the intrinsic binding energy during enzymatic catalysis? Choose all that apply. a. hydrogen bonding b. permanent covalent bonding c. electrostatic interactions d. van der Waals interactions e.

If the mass of a material is 86 grams and the volume of the material is 25 cm3, what would the density of the material be?

Assuming an efficiency of 41.50%, calculate the actual yield of magnesium nitrate formed from 136.7 g of magnesium and excess copper (ii) nitrate.

Which of the following is the result of the process that binds many amino acids on to another? a. protein b. allele c. dna d. rna

What does the electron transport chain do to the concentration of hydrogen ions (protons) ?

What is the cation name for alcl3?

Moles of hydrogen gas (14) 0.00336 mol 0.00481 mol Moles of hydrogen per g sample (n*,) mol/g mol/g

A hurricane and a typhoon are the same thing true or false?