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Determining the mass and mass % of the atoms in a molecule.
1. Compute the mass of fluorine (in grams) in 37.1mg of calcium fluoride, CaF2.
2. Conclude the mass % of carbon, hydrogen and oxygen in acetate, C2H3O2.
What are the major sources and emissions of air pollution in your community? What chemicals are they emitting, and how are these chemicals transported through your community (non-point sources, smokestacks, etc.)? Were y ...
A 12.0 mL sample of a compound has a density of 1.44 g/mL. What is the weight of the sample in g?
For this question imagine that sea water is a 3.5 mass % solution of NaCl with a density of 1.00g/mL. Assume full dissociation of the NaCl. a) Calculate the freezing point of sea water.Briefly explain why it is not 0 (de ...
When .0430 mole of titanium is combusted in a bomb calorimeter, the temperature of the calorimeter increases from 30.00degress Celsius to 91.60 degrees Celsius. In a separate experiment, the heat capacity of the calorime ...
Explain how bacteria are intimately involved in the generation of acidic mine waters
1. Calculate the grams of Na 2 CO 3 required to prepare 250.0 mL of 0.375 M Na 2 CO 3 solution. 2. The reaction of sodium carbonate with hydrochloric acid produces carbonic acid and sodium chloride. If 25.00 mL of O.0 ...
1. A Rolaids tablet has 550 mg of calcium carbonate and 110 mg of magnesium hydroxide. a) Write the two neutralization reactions with stomach acid (assume HCl, don't combine reactions) b) If the acid concentration is 4.0 ...
Hello, need help with the following chem questions. Aluminum reacts with chlorine gas to form aluminum chloride via the following reaction: 2Al(s)+3Cl2(g)→2AlCl3(s) You are given 24.0 g of aluminum and 29.0 g of chlori ...
At a particular location in a countercurrent stripper for the removal of solute A from a liquid stream, the mole fraction of the transferring species A in the bulk gas phase is 0.01, and the mole fraction of solute A in ...
When 45.0 g of an unknown nonvolatile nonelectrolyte is dissolved in 500.0 g of water, the resulting solution freezes at -0.930 °C. What is the molar mass of the unknown substance? K f = 1.86 °C/ m for water.
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