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When an ion-selective electrode for X was immersed in 0.0480 M XCl, the measured potential was 0.0330 V. What is the concentration of X when the potential is 0.0480 V? Assume that the electrode follows the Nernst equation, the temperature is at 25°C, and that the activity coefficient of X is 1.
If you add 0.35 g NaF to 150 mL of a 0.30 M HF, what is the pH of the resulting solution?
Draw the molecule by placing atoms on the grid and connecting them with bonds. Include all lone pairs of electrons. Show the formal charges of all atoms in the correct structure. ClO4 -
The rate constant for this reaction at 25 degrees C is 4.9 x10-6 L/(mol s) while the rate constant at 35 degrees Cis 1.5 x 10-5 L/(mol s). Use this data to calculate the energy of activation for this reation.
For the reaction SO3+H2O=H2SO4 calculate the percentage yield if 600 g of sulfur trioxide react with excess water to produce 475 g of sulfuric acid
How many ATOMS of xenon are present in 3.25 moles of xenon trioxide. How many MOLES of oxygen are present in 9.37E+22 molecules of xenon trioxide
For each titration I need to calculate the moles of base needed to neutralize the acid sample. How do I go about doing this?
A 125.0g sample of copper is initially at 25.0oC. It absorbs 12.50 kJ heat from its surroundings. What is the final temperature to the nearest tenth degree? Specific heat copper = 0.3874 J/goC.
Consider the voltaic cell , which is based on the following cell reaction. Zn(s) + Cu2+(aq) Zn2+(aq) +Cu(s) Under standard conditions
Rubidium has two naturally occurring isotopes with the following masses and natural abundances, Calculate the atomic weight of rubidium.
A bomb calorimeter with an insulating heat capacity is used to burn 5.682g of a chocolate candy bar. If the 1.00kg of water in the calorimeter then increased from 18.0220C to 56.1250C, what is the U for the chocolate in kJ/g chocolate
2C4H10 + 13O2 → 8CO2 + 10H2O The equation shows the combustion of butane (C4H10). How many moles of water can be produced by 12.5 moles of C4H10 with excess oxygen.
Carbon-14 has a half-life of 5730 yrs. A living organism has an activity of 15.2 counts per minute (cpm) per gram of carbon. If a bone is determined to have an activity of 3.80 cpm per gram of carbon, how old is the bone
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