How many moles are present in a 24.5 gram sample of K2Cr2O7?

What types energy is microwave?

What distinguishes a substance from a mixture?

How many turns of the citric acid cycle must you complete?

Calculate the mass in grams of hydrogen chloride produced when 5.15 l of molecular hydrogen measured at stp reacts with an excess of molecular chlorine gas. h2 (g) + cl2 (g) → 2hcl (g)

Scientists have speculated that element 126 might have a moderate stability, allowing it to be synthesized and characterized. predict what the condensed electron configuration of this element might be.

An atom that contains 22 protons, 23 neutrons, and 22 electrons would have a mass of approximately

Compared with a ph of 7, a solution of ph 5 has what times/fraction of the hydrogen concentration?

Write a formulae equation to represent the combustion of carbon to form carbon dioxide and the thermal decomposition of magnesium carbonate

A5.00 liter ballon of gas at 25 degree Celsius is cool to 0 degrees Celsius. What is the volume (liters) of the ballon?

How much thermal energy (q) is required to heat 15.2 g of a metal (specific heat = 0.397 J/G) from 21.0 degrees C to 40.3 degree C