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How were atomic masses for the elements determined?
The amount of energy needed to heat 2.00 g of carbon from 50.0 C to 80.0 C is 42.6 J. what is the specific heat capacity of this sample of carbon.
Calculate the thermal energy (in J) needed to increase the temperature of a 2.4 kg piece of iron from 29.9o C to 51.2o C. The specific heat of iron is 0.449 J/g*Co. Type your answer in scientific notation using the format 8.050e-3 for 8.050 × 10-3.
Question- Can anyone draw the mechanism starting from diethyl adipate then adding NaOEt to form ethyl cyclopentanone-2-carboxylate? Draw with curved arrows and draw lone pairs.
Problem- Imagine that some digestive juices containing the strong acid hydrochloric acid accidently entered the bloodstream through a perforated ulcer. If the blood were well supplied with H?2PO??4, and HPO42? ions, tell what would occur chemica..
The theoretical yeild of Ni(NH3)6Cl2 moles must be calculated as well as the theoretical yield of Ni(NH3)6Cl2 grams. How do you find the limiting reagent to calculate the theoretical yield.
Describe the development of the modern periodic table. Include contributions made by Lavoisier, Newlands, Mendeleev, and Moseley.
calculate the pH and the equilibrium concentrations of all species present (Ch3CO2H, CH3CO2-, NH3, NH4+, H2O+, and OH-). Values of equilibrium constants can be looked up.
State the circumstances under which you would use either a reagent grade chemical or a primary standard.
Give the two substitution products (skeletal isomers) when the following compound is added to a solution of sodium acetate in acetic acid
1calculate the total pressure in atm of a mixture of 0.0270 mol of helium he and 0.0200 mol of oxygen o2 in a 4-l flask
What mass of magnesium, in reaction with an excess of hydrochloric acid, is needed to produce 128 mL of hydrogen (H2) gas. The H2 gas is collected over water at a temperature of 25°C
At 200°C, in the reaction below, the molar concentration of A was 7.81 M after 2.33 s and 1.45 M after 7.93 s. What is the average rate of reaction in M/s? 2A => Q + Z
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