42.5 grams of an unknown substance is heated to 105.0 degrees celsius and then placed into a calorimeter containing 110.0 grams of water at 24.2 degrees celsius. if the final temperature reached in the calorimeter is 32.4 degrees celsius, what is the specific heat of the unknown substance?

show or explain the work needed to solve this problem, and remember that the specific heat capacity of water is 4.18 j/(°c x g).

Construct the hypothetical phase diagram for metals a and b between room temperature (20c) and 700c, given the following information: * the melting temperature of metal a is 480c. • the maximum solubility of b in a is 4 wt% b, which occurs at 420c. • the solubility of b in a at room temperature is 0 wt% b. • one eutectic occurs at 420c and 18 wt% b–82 wt% a. • a second eutectic occurs at 475c and 42 wt% b–58 wt% a. • the intermetallic compound ab exists at a composition of 30 wt% b–70 wt% a, and melts congruently at 525c.• the melting temperature of metal b is 600c. • the maximum solubility of a in b is 13 wt% a, which occurs at 475c. • the solubility of a in b at room temperature is 3 wt% a.

Compare and contrast the bohr model and the electron cloud models of the atom.

Compare and contrast solutions and suspensions