If a substance changes from one phase to another, is it still same substance? why

How would B change to gain stability? lose 3 electrons gain 5 electrons

A student recorded the following buret readings during titration of a base with an acid

What do waves transfer? Both matter and energy Neither matter nor energy Energy Matter

A solution contains some or all of the following ions: Sn4+, Ag+, and Pb2+. The solution is treated as described below: Test 1) Addition of 6 M HCl causes a precipitate to form. Test 2) Addition of H2S and 0.

What can be said about a reaction with H = 62.4 kJ/mol and S = 0.145 kJ / (mol·K) ?

Small differences between parents and offspring accumulate over time. This process A. prevents parents from being able to care for their offspring. B. results in only one type of organism that has the exact same characteristics as its ancestors. C.

Use Boyle's, Charles's, or Gay-Lussac's law to calculate the missing value in each of the following. (a) V1 = 2.0 L, P1 = 0.62 atm, V2 = 1.0 L, P2 = ? atm (b) V1 = 230 mL, T1 = ?, V2 = 400. mL, T2 = 298 K K (c) V1 = 0.55 L, P1 = 740 mm Hg, V2 = 0.

Is potassium a metal metalloid or nonmetal?

How does protein substance in an animal hide or skin be prevented from bacterial infection during the process of tanning? * a. By soaking in water b. By deliming using an acid c. By brine curing d. By scudding with dull knife

Nonpolar materials have separated positive and negative areas. True False