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The standard heat of formation \Delta H^\circ _{\rm f} is defined as the enthalpy change for the formation of one mole of substance from its constituent elements in their standard states. Thus, elements in their standard
Calcite (CaCO3) has two types of bond. What are the two types? Demonstrate which is the stronger by calculating the degree of ionic character of each bond
A 70.0 g steam sample at 150.0 degree Celsius was converted to ice at -150.0 degree Celsius, calculate the total amount of heat removed in the process.
a solution was prepared by mixing 50 ml of 0.100 M HCl with enough water to get 250 ml solution . what is the M of the final solution of hydrochloric acid?
determined the limiting reactant and the theoretical yield (in g) of nitrogen that can be formed from 24.0 g N2O4 and 23.5 g N2H4 molar masses are as follows: n2o4 92.02 n2h4 32.05
How would one synthesize 1,3-dibromo-2-methoxy-5-nitrobenzene starting with benzene
For the lead-acid battery with the overall reaction: PbO2(s)+Pb(s)+2HSO4^-(aq)+2H^+->2PbSO4(s)+2H2O(l) what are the oxidation states of lead at these places: Anode : 0 Cathod: +4 fully discharged anode: +2 Could you explain it fully
Draw a diagram showing the stratification in a body of water. Label the different layers and describe the type of chemistry (and species) that occurs at each level.
how do you calculate the vapor pressure of water above a solution prepared by dissolving 34.9 g in glycerin c3h8o3 to
An intravenous replacement solution contains 4.0mEq/L of Ca2+ ions. How many grams Ca2+ are in 3.0L solution
Suppose you measured the product of PV of 1 mol of a dilute gas and found that PV= 27.54 L atm at 0.00 C and 37.32 L atm at 100 C.
Brass is a copper and zinc alloy containing 31.8% zinc by mass and having a density of 8.73 {\rm \frac{g}{cm^3}}. A fitting composed of common brass has a total volume of 335.6 {\rm cm^3}
If four moles of sodium sulfate are dissolved in water how many moles of sodium ions would be in solution?
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