When a system performs work on the surroundings, the work is reported with a negative sign. True of False

This cell part lets water and other nutrients in and out of the cell

How many moles of gold are in 31.3 g of gold?

How does mass defect relate to binding energy in the nucleus? A. They both represent uncertainty in mass and energy measurements. B. The mass defect represents the mass converted to binding energy C.

When 1.20 moles c react with 1.20 moles o2, 2.40 moles co2 are obtained. a. True b. False?

Write a balanced equation for the reaction of chlorine gas with fluorine gas. express your answer as a chemical equation. identify all of the phases in your answer.

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