You put a solid in water and it floats but doesn't dissolve.

A) The density of water equals the density of the solid

B) The water's density is greater than that of the solid

C) The water's density is less than that of the solid

Which radioisotope is used to treat thyroid disorders? (1) Co-60 (3) C-14 (2) I-131 (4) U-238

Which will be true for any actual or potential nucleophilic substitution reaction?

Which correctly describes an issue relating to the mining and extraction of uranium? Select all that apply.

Which item is not commonly recycled?

A. you are given samples of 1.0 g of he, fe, li, si, and c. which sample contains the largest number of atoms? which contains the smallest? support your answer with evidence

How should scientist respond when new evidence that challenges current is presented?

Consider the following reaction, equilibrium concentrations, and equilibrium constant at a particular temperature. Determine the equilibrium pressure of H2. D2 (g) + H2 (g) ⇌ 2 HD (g) Kp = 1.80 P (D2) eq = 1.1 * 10-3 atm P (HD) eq = 2.7 * 10-3 atm

Find δe for the change in state of 1.0 molh2o (l) at 79 ∘c to h2o (g) at 116 ∘c. the heat capacity of h2o (l) = 75.3 j/molk, heat capacity of h2o (g) = 25.0 j/molk, and the heat of vaporization of h2o is 40.7*103j/mol at 100 ∘c.

Balloon A started with a volume of 1.76 L. The temperature of the room the balloon was in was 295 K. The balloon was heated to a temperature of 253.15 K. What is the new volume?

The standard internal energy change for a reaction can be symbolized as ΔU°rxn or ΔE°rxn. For the following reaction equations, calculate the energy change of the reaction at 25 °C and 1.00 bar. Sn (s) + Cl2 (g) - - - > SnCl4 (l) + H (KJmol) - 511.3.