Which compound is insoluble in water?

(1) KOH (3) Na3PO4

(2) NH4Cl (4) PbSO4

Name three elements that have been added to the periodic table since mendeleev's time

Structural formulas are like models because they show _[blank]_. Which answer best completes this statement?

Explain how scientific advancements have lessened the effects of hazardous events on society.

A chemical reaction that has a positive δg is best described as

A chemical reaction is at equilibrium when a chemical reaction is at equilibrium when there is no reverse reaction possible, only a forward reaction. the reaction occurs quickly.

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