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Write chemical equations for the reaction of calcium with the following substances, making sure that the numbers and kinds of atoms are the same on both sides of the equations. If no reaction occurs, write N.R. (a) H2O (b) He (c) Br2 (d) O2
The amount of heat needed to raise the temperature of 25 g of a substance by 15°C is 915 J. What is the specific heat of the substance?
What is Le Chatelier's principle and explain what happens to the dynamic equilibrium of the system as the cyclohexene is distilled to the receiver flask
Titration of the lead and zinc in this aliquot required 34.06 mL of the EDTA solution. Finally, cyanide was used to mask the copper and the zinc in a 25.00 mL aliquot. Titration of the lead required 26.68 mL of the EDTA solution. Determine the com..
Suppose a volume is divided into three equal parts. How many microstates exist for distributing four molecules among the three parts?
For 220.0 mL of a buffer solution that is 0.205 M HCHO2 and 0.295 M KCHO2, calculate the initial and the final pH after adding 0.010 mol of NaOH.
It only contains only C,H, and O. A 116mg sample was treated with an excess of methylmagnesium bromide, producing 48.7ml of methane gas at 20 degrees C and 750mm Hg.
If the density of water is 1.00g/mL, what is the weight in pounds of gallon of water? you may assume that mass and weight are equivalent at the earth's surface.
Determine how many significant figures are there in the Fahrenheit result when 7.02C converted to Fahrenheit scale,?
What is the partial pressure of H2O in the compressed gas mixture? (See this table.) torr (b) What mass of water vapor condenses to liquid g
The compound malonate is an analog of succinate and is a strong inhibitor of succinate dehydrogenase. The active site of the enzyme will bind to either molecule, however malonate will not undergo any reaction and gets stuck on the enzyme.
Construct the molecular diagram for the system of a delocalized 1,3,5,7-cyclooctatetraene. What does this predict about this system. Is there a more stable arrangement for the bonds
How many grams of CO2 can be produced by the reaction of 35.5 grams of C2H2 and 45.9 grams of O2? Please help with the balancing the equation
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