Oil floats on the surface of water but mercury sinks. why?

For the reaction? C6H6 + ? O2 →? CO2 + ? H2O 42.5 grams of C6H6 are allowed to react with 113.1 grams of O2. How much CO2 will be produced by this reaction? Answer in units of grams

Which statement best describes the difference between a physical change and a chemical change

Convert 790 calories to Joules.

A container holds 1.1 g of argon at a pressure of 8.0 atm. you may want to review (pages 382 - 383). how much will the temperature increase if this amount of heat energy is transferred to the gas at constant pressure?

5. En el laboratorio se dispone de una disolución concentrada de ácido clorhídrico del 30% en masa y densidad 1.15g/cm3. Calcula: a) Molaridad b) La fracción molar del ácido clorhídrico. c) La molalidad.

Ammonia (nh3 (g), hf = - 46.19 kj/mol) reacts with hydrogen chloride (hcl (g), hf = - 92.30 kj/mol) to form ammonium chloride (nh4cl (s), hf = - 314.4 kj/mol) according to this equation:

How does an electromagnet create a magnetic field

Magnetism, reactivity, and fluorescence are three special properties used to identify minerals. true or false

Which of these molecules is least likely to form a hydrogen bond with a water molecule

George is writing an essay about the role of observation and inference in the development of the atomic theory. He wants to explain why it was more difficult to observe the presence of neutrons in atoms.