23. what are the correct formulas and coefficients for the products of the following double replacement reaction? al(oh)3 + h3po4 → *

a. alpo4 + h2o

b. alpo4 + 3 h2o

c. h3al + (oh)3po4

d. 3alpo4 + h3(oh)3

24. what type of reaction is 2s(s) + 3o2 (g) → 2so3(g)? *

a. combination reaction

b. decomposition reaction

c. single replacement reaction

d. double replacement reaction

Two nitro no2 groups are chemically bonded to a patch of surface. they can't move to another location on the surface, but they can rotate (see sketch at right). it turns out that the amount of rotational kinetic energy each no2 group can have is required to be a multiple of ε, where =ε×1.010−24 j. in other words, each no2 group could have ε of rotational kinetic energy, or 2ε, or 3ε, and so forth — but it cannot have just any old amount of rotational kinetic energy. suppose the total rotational kinetic energy in this system is initially known to be 32ε. then, some heat is removed from the system, and the total rotational kinetic energy falls to 18ε. calculate the change in entropy. round your answer to 3 significant digits, and be sure it has the correct unit symbol.

What type of matter is made of only one kind of atom

Amixture that has two or more substances that are spread out evenly is called a. compound b. heterogeneous c. substance d. homogeneous