Which of the following items represents a chemical change? burning melting evaporation freezing

The physical properties of a compound are similar to those of its elements.

a. True

b. False

The rate law of the reaction NH3 + HOCl → NH2Cl + H2O is rate = k[NH3][HOCl] with k = 5.1 * 106 L/mol·s at 25°C. The reaction is made pseudo-first-order in NH3 by using a large excess of HOCl.

Do the periods on the periodic table represent the energy levels for atoms

In the number 12.345, the 4 is in the place.

How does the heat content of the reaction change in the process of photosynthesis when a glucose molecule is formed?

How positive charge affect ionization energy

Which describes the polarity in a water molecule? a). partial negative charge on the oxygen atom because its electrons are pulled toward the hydrogen atoms b).

To what temperature in kelvin will a 2.3 L balloon have to be heated to expand to a volume of 400 L Assume the initial temperature of the balloon is 25 degrees celsius.

In which changes of state do atoms lose energy?

Can you live without body tissue? This is a yes or no question, no explaining required, but you can add it if you want. : D

According to the graph, which activity has used the largest amount of water over the past twenty years?