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Sodium reacts with hydrogen gas. How many grams of sodium are needed to react with 2.50 L of hydrogen measured at STP? What is the balanced chemical equation for this reaction?
How much heat is required to vaporize 351 g of liquid ethanol at its boiling point.
Calculate its standard heat of combustion in kilojoules C5H12O with a Delta H of -313.6 kJ/mol
What is the pH at the equivalence point when 0.0300 M NaF is titrated with 0.0610 M HClO4. (pKa = 3.17.)
A 100. mL sample of 0.200 M aqueous hydrochloric acid is added to 100. mL of 0.200 M aqueous ammonia in a calorimeter whose heat capacity (excluding any water) is 480. J/K. The following reaction occurs when the two solutions are mixed.
Require to apply to neutralize the acidity that concluded from nitrification and determine how much CaCO 3
Which of the following is true of the individual resonance structures which contribute to a resonance hybrid. a) each resonance structure actually exists
The temperature is held at 271 K. Calculate the work done by the gas(in joules). to give the appropriate sign
Determine the molecular formula of the oxide of phosphorous when it is in its gaseous state.
The concrntration of the alkane C20H42 (FM 282.55) in particular sample of rainwater is 0.2 ppb. Assume that the density of rainwater is close to 1.00 g/mL
metallic aluminum reacts with mno2 at elevated temperatures to form manganese metal and aluminum oxide. a mixture of
but is lined with a calcite surface. Determine the concentrations of Ca2+, HCO3-, CO32-, and H2CO3. Examine the charge balance and comment on what else your neighbor may be doing to his pond.
Phosphorus pentachloride decomposes according to the chemical equation Kc=1.80@250C PCL5(g) PCL3(g)+CL2(g) A 0.240 mol sample of PCl5(g) is injected into an empty 3.95 L reaction vessel held at 250 °C. Calculate the concentrations of PCl5(g) and P..
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