Which number is 0.0069 expressed in scientific notation?

Suggest one reason why it is difficult to dispose of the waste rock

Elvin is asked to analyze a 0.353 gram sample of metal. He measures the amount of heat released by cooling it from 50.0 °C to 22.0 °C as 2.28 J. What is the specific heat of this metal? What metal could this be?

The equilibrium constant for the reaction of carbon monoxide with water is 1.845. if 1.00 mol of each reactant is placed in a 2.00 l container, what is the concentration of carbon dioxide at equilibrium? co (g) + h2o (g) co2 (g) + h2 (g)

Remember to use the proper number of significant figures and leading zeros in all calculations. A sample has a mass of 35.4 g and a volume of 36.82 mL. What is the density of the sample? 1.04011 g/mL 1.04 g/mL 0.96143 g/mL 0.961g/mL

Only 10% of energy available at each trophic level moves on to the next level. What happens to the other 90%

Is a gas that is produced by the ultraviolet radiation in the air in the vicinity of welding operations?

How much MnO2 (s) should be added to excess HCl (aq) to obtain 295 mL of Cl2 (g) at 25 °C and 735 Torr?

Why do people describe water as a universal solvent

What is litmus paper used for? To indicate if all the reactants have been used up to determine if a chemical reaction has occurred to determine pH to detect the presence of water

You open your lemonade stand with 100 lemons, 5 bags of sugar containing 6 cups each, and 10 gallons of water (16 cups per gallon). Which statement is NOT true about the production of lemonade in your stand?