An atom of tin has an atomic number of 50 and a mass number of 119 how many protons neutrons and electrons does this atom have

Which of the following contains the smallest amount of matter 30 G 3000 CG 30 DG 0.30 kg

The most common carbonate rock is A) dolomite. B) halite. 35) C) limestone. D) calcite.

If a hydrate of the formula MCly? xH2O decomposes when heated to produce HCl, what change would you expect to occur when a piece of blue litmus paper is held in the path of the vapor released?

Which atomic model was proposed as a result of J. J. Thomson's work? the plum pudding model the indivisible atom model an atom that had a lot of empty space an atom that had a concentrated nucleus

A compound composed of only c and f contains 17.39 c by mass. what is its empirical formula

According to Newtons's first law, which characteristic of a moving object would remain constant if there were no other force of acting of it? A. Size B. Mass C. Shape D. Speed

Standard reduction potentials are 1.455 V for the PbO2 (s) / Pb (s) couple, 1.82 V for Co3 (aq) / Co2 (aq), 3.06 V for F2 (g) / HF (aq), 1.07 V for Br2 (l) / Br - (aq), and 1.77 V for H2O2 (aq) / H2O (l).

Which compound is inorganic? a. glucose (c6hl2o6) b. carbon dioxide (co2) c. ethane (c2h6) d. stearic acid (cl8h36o2) ?

Pure aluminum metal has a density of 2.70 g/cm

A 0.250-g chunk of sodium metal is cautiously dropped into a mixture of 50.0 g of water and 50.0 g of ice, both at 08C. The reaction is 2Na (s) 1 2H2O (l) 88n 2NaOH (aq) 1 H2 (g) DH 5 2368 kJ