Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Water softeners often replace calcium ions in hard water with sodium ions. Since sodium compounds are soluble, the presence of sodium ions in water does not result in the white, scaly residues caused by calcium ions. However, calcium is more beneficial to human health than sodium. Calcium is a necessary part of the human diet, while high levels of sodium intake are linked to increases in blood pressure. The Food and Drug Administration (FDA) recommends that adults ingest less than 2.4 g of sodium per day.
Part A
How many liters of softened water, containing a sodium concentration of 0.040 % sodium by mass, have to be consumed to exceed the FDA recommendation? (Assume a density of 1.0 g/mL for water.)
Express your answer using two significant figures.
What is the H3O+ concentration of the solution?
An unknown salt is either NaCN, NaC2H3O2, NaF, NaCl, or NaOCl. When 0.100 mol of the salt is dissolved in 1.00 L of solution, the pH of the solution is 8.07. What is the identity of the salt
a 50.0 gram piece of iron at 152 degrees celsius is dropped into a 20.0 grams of water at 89 degrees celsius in an open
when separated from a water solution cuso4 forms a hydrate with 5 water molecules per formula unit. if 38 g of
Problem- Starting with pure aluminum nitrate crystals distilled water, write a stepwise recipe to make 380.0ml of aluminum nitrate solution that has a nitrate concentration of 0.470M
She claims that the uncertainty of the bacterium's position is greater than the microscope's viewing field, and the bacterium is thus impossible to locate. What is the uncertainty of the position of the bacterium
Calculate the number of moles of NaOH in the Solution. 0.0395 moles Calculate the value (calories) for the heat of solution. -343 cal Calculate the ?Hsolution for sodium hydroxide
You'd like to prepare a 250.0 mL of a 0.4570 M NaCl solution using a volumetric flask. What mass of NaCl will you need in grams
an unknown salt is either naf nacl or naocl.when 0.050 mol of the salt is dissolved in water for form 0.500 l of
Calculate the activation energy of a reaction if the rate constant is 0.75 s 1at25 Celsius and 11.5 s 1at 75 celsius. (the universal gas constant is 8.314J/mol K)
The half-life of 137Ce is 30. years. If we have 150.000 g of 137Ce now, how many grams of Ce will remain in 150. years?
Using the following data, calculate the pressure of 1.00mol of Ar(g) in a 40.0L container at 25 degrees Celcius using both the ideal gas equation and the real gas equation. Why are these two values so different? (aAr=136.3L2kPa mol-2; bAr=0.0322L ..
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd