Calculating the avogadro number
KCl has the same structure as NaCl (Face-centered). The length of the unit cell is 628 pm. The density of KCl is 1.984 g/cm^3, and its formula mass is 74.55 amu. Using this information, calculate Avogadro's number.
Expected delivery within 24 Hours
If a 10. m3 volume of air (acting as an ideal gas) is at a pressure of 760 mm and a temperature of 27 degrees Celsius is taken to a high altitude where the pressure is 400. mm Hg and a temperature of -23 degrees Celsius, what volume will it occupy
Write balanced molecular, ionic, and net ionic equations for the reactions of chromium (gives Cr3+) with solution of dilute sulfuric acid to give hydrogen plus the metal ion in solution (assume full acid dissociation).
What will be the enthalpy change (to 2 significant figures) for the reaction when 1.5 g of lithium metal reacts with chlorine gas at constant pressure?
What is the value of this 20 year lease? The first payment, due one year from today is $2,000 and each annual payment will increase by 4%. The discount rate used to evaluate similar leases is 9%
In the reaction P4 + 5 O2 → 2 P2O5, how many moles of O2 are consumed each time 0.5 moles of P2O5 form?
The temperature rose by 0.910 K. In a separate experiment in the same calorimeter, the combustion of 0.825 g of benzoic acid, for which the internal energy of combustion is -3251 kJ mol-1, gave a temperature rise of 1.940 K. Calculate the internal
What proportion of the molecules have enough speed to escape when the temperature is (a) 240 K, (b) 1500 K? Calculations of this kind are very important in considering the composition of planetary atmospheres.
When 25.0mL of .500M H2SO4 is added to 25.0mL of 1.00M KOH in a coffee cup calorimeter at 23.50 degree Celcius, the temperature rises to 30.17 degree celcius. Calculate ethalpy of this reaction.
1926798
Questions Asked
3,689
Active Tutors
1425081
Questions Answered
Start Excelling in your courses, Ask a tutor for help and get answers for your problems !!
Basic principles and practices of nutrition Complete the following table for the seven nutrient groups and provide at least two examples
Respond to this statement: The patient has Bipolar Depression and received a new diagnosis of Gambling (F63.0). Has had significant issues
Which response by the nurse is most appropriate to assist the client in making good nutritional choices?
The DNS initiates discussion with the nursing department about the standard survey exit conference that occurred two days ago.
A nurse manager calls a staff meeting to discuss Mr. Frank, an employee who is absent. The nurse manager tells the staff that she knows Mr. Frank
Select all that apply Choose the answer options that avoid jargon, using only language that is appropriate for formal writing. Select all that apply.
The nurse is assessing a client newly transferred from the recovery room and notes a low-grade temperature, tachycardia, tachypnea, and crackles.