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Explain what volume (L) of NH3 gas at STP is produced by the complete reaction of 7.5 g of H2O according to the following reaction?
Mg3N2 (s) + 6H2O (l) ----> 3Mg(OH)2 (aq) + 2NH3 (g)
Calculate the mass of aluminum deposited on the purified aluminum metal by the application of a current of 1.225 kiloamperes for 30 minutes from a very large quantity of a solution containing Al3+ ion in the Al2O3/Na3AlF6 molten state.
A lab procedure requires 35.0 mL of a liquid. Which of the following glassware should be used to obtain the volume with the greatest number of significant figures: 50mL beaker, 100mL erlenmeyer flask, 250mL graduated cylinder, 50mL graduated cylin..
a solution is 0.010 m in both br- and so42-. a 0.250 m solution of leadii nitrate pbno32 is slowly added to it. a which
an aqueous solution is prepared by diluting 3.30mL acetone, CH3COH3, (d= 0.789g/mL) with water to a final volumeof 75.0 mL. The density of the solution is 0.993 g/mL. what are the molarity and the molality of acetone in this solution?
A Researcher reads directions that call for addition of 25.0 mL of anhydrous ethanol (ethyl alcohol). From among the bottles in the lab, which one should she select
at 340 k kp 69 for the reaction h2g i2g -gt 2hig. 50.0 g of hi is injected into an evacuated 5.00-l rigid cylinder at
1.0 atm pressure of oxygen is 0.041g/L. The solubility of oxygen in water at 3.0 atm and 25 C is _____ g/L.
A flask contains both A and B. Both decompose following first-order kinetics with half-lives of 50 and 18 minutes, for A and B respectively. If the concentrations of A and B are initially the same, how long will it take for the concentration of A ..
A solution is created by adding 0.05 moles of H2CO3 (3.1 g, total mass) to 5-L of water, resulting in a pH of 4.2. Now, we add sodium hydroxide (NaOH, strong base) until the pH reaches 7. You can neglect any changes in volume. What is the alkalini..
What is the DO concentration at saturation in water if the temperature is 10 degrees celcius and pressure is 1 atm/express your answer in mg/l of O2.(oxygen)
What is a specific example that exists foreach: biochemical, pharmaceutical and diagnostic chemical reactions in healthcare and why might it be of importance to healthcare professionals?
What is the enthalpy of reaction, (triangle) H, for the formation of Tungsten carbide, WC, from the elements? W(s) + C(graphite) -> WC(s)
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