At stp, what is the volume of 4.50 moles of nitrogen gas

Which of the following best decribes the fluoride content of bottled water? unpredictable, high, low, moderate

Sodium carbonate is a reagent that may be used to standardize acids. true or False

For an alloy that consists of 78.2 g copper, 103.5 g zinc, and 2.8 g lead, what are the concentrations of (a) Cu, (b) Zn, and (c) Pb in weight percent? The atomic weights of Cu, Zn, and Pb are 63.54, 65.39, and 207.2 g/mol, respectively.

Atmospheric chemists think that Earth's first atmosphere a. was very similar to today's atmosphere. b. contained no oxygen atoms. c. consisted of carbon in the form of carbon monoxide. d. consisted of carbon in the form of carbon dioxide. E.

a cylinder has a density of 3.75g/cm3. if it has a mass of 12.1 g and a diameter of 8.22 cm, what is its height?

When an ice cube melts what happens to the matter that once made up the cube

There are many sources of air pollution in the united states and around the world. Some are natural sources, and other come from human activities. Which of these examples is a natural source of air pollution? A.) car exhaust fumes B.

The stepwise formation constants for complexes of NH3 with [Cu (OH2) 6]2 + (aq) are logK11 = 4.15, log K12 = 3.50, log K13 = 2.89, log K14 = 2.13, log K15 = - 0.52. Suggest a reason why Kt5 is so different? (10)

What structure do all of these elements have in common? A) number of protons B) numbers of electrons C) number of energy levels D) number of valence electrons

How does balancing equations depend on the law of conservation of matter?