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Magnesium oxide decomposes into magnesium and oxygen. If 4.03 g of magnesium oxide decomposes to form 2.43 g of magnesium, what mass of oxygen gas is also released in the reaction?
Determine the molarity of a solution formed by dissolving 15.79 grams of CaCl 2 , calcium chloride in 200.grams of H 2 O, water?
A reaction has a rate constant of 1.27×10?4/s at 29 degrees C and 0.234/s at 79 degrees C. A) Determine the activation barrier for the reaction. B) What is the value of the rate constant at 15
The diameter of a molecule is approximately 1x10^(-18) mets. If 1 nm is equal to 10^(-9)m and 10 Ångstroms, what is the diameter of the nucleus in Ångstroms
describe the underlying concepts of how laboratory activity works. descreption should be at least half page
A solution of ammonia and water contains 2.10×1025 water molecules and 5.30×1024 ammonia molecules. How many total hydrogen atoms are in this solution?
Calculate the mass percent composition of carbon in each the following carbon compounds. Express your answer using 4 significant figures. C4H10 C6H10 C8H13O5N
Using the table of polyatomic ions, write the correct chemical formula for the following ionic compound. Use the Solubility Rules to write the dissociation equation when the ionic compounds are placed in water.
Determine the Ka value of acetic acid at 105 degrees C from the following data: A 0.3 Molar aqueous solution of acetic acid shows a pH of 2.642 at 105 degrees C. You can use the approximation formula here because the concentration of the acetic ac..
a graduated cylinder contains 129 of water. a 12.0 piece of iron density 7.86 and a 15.0 piece of lead are added.
What approaches do we use to treat the inter electron repulsion part of the Hamiltonian for multi-electron atoms including helium and beyond.
write seperate oxidation and reduction half reactions3 no3- aq 8al s 5 oh- aq 18 h2ol ---gt 3 nh3 g 8 aloh4-
The absorbance at 595 was 0.75 and according to a BSA standard curve corresponding to 0.025 mg protein on the x-axis. What is the protein concentration (mg/ml) of the original protein?
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