Wnich action forms a different chemical substance?

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A

crushing a rock

B

burning a piece of wood

с

mixing salt and pepper

D

melting an ice cube

What can a drop of liquid mercury be described as?

The temperature rises from 25.00°c to 29.00°c in a bomb calorimeter when 3.50 g of sucrose undergoes combustion in a bomb calorimeter. Calculate δerxn for the combustion of sucrose in kj/mol sucrose. The heat capacity of the calorimeter is 4.

The oxidation numbers of nitrogen in NH3, HNO3, and NO2 are, respectively: - 3, - 5, + 4 + 3, + 5, + 4 - 3, + 5, - 4 - 3, + 5, + 4

If one species in a community does out or moves, the community will A) be affected. B) stop working. C) not be affected. D) replace the species.

Uppose the reaction between naphthalene and 2-bromo-2-methylpropane did not run to completion, so that the limiting reagents were not consumed.

What are genes a part of?

What is the mass (in grams) of 8.45 x 1023 molecules of dextrose: C6H12O6 (Mw. 180.16 g/mol) ?

How do the number and kind of atoms in the reactants compare to the number and kind of atoms in the products

Scientists conduct experiments to collect evidence. Which of the following is the best definition of the word experiment as used by scientists?

The compound HCI is an example of a (n) A. covalent compound B. ionic compound C. element D. salt