When copper metal is added to nitric acid, the following reaction takes place cu (s) + 4 hno₃ (aq) → cu(no₃)₂ (aq) + 2 h₂o (l) + 2 no₂ (g) calculate the volume of no₂ gas collected over water at 25.0 °c when 2.01 g of copper is added to excess nitric acid if the total pressure is 726 mm hg. the vapor pressure of water at 25.0 °c is 23.8 mm hg.

How hot is the suns corona? (integrated science)

Inside a flashbulb, oxygen surrounds a thin coil of magnesium. when the flashbulb is set off, a chemical reaction takes place in which magnesium combines with oxygen to form magnesium oxide. which of the chemical equations matches the reaction above? a. mg + o2 mgo2 + energy b. 2mg + o mg2o + energy c. 2mg + o2 2mgo + energy d. mg + o mgo + energy

Which statement is true about the model of the electromagnetic spectrum a: it change the frequencies of light. b: it compare wavelengths of light. c: the color of light waves can be changed using the model. d: the intensities of light waves can be decreased using the model.