Chemistry, 24.07.2019 11:30 tejasheree
Since soap and detergent action is hindered by hard water, laundry formulations usually include water softeners—called builders—designed to remove hard water ions (especially ca2 + and mg2 + ) from the water. a common builder used in north america is sodium carbonate. suppose that the hard water used to do laundry contains 75 ppm caco3 and 55 ppm mgco3 (by mass). what mass of na2co3 is required to remove 90.0% of these ions from 10.0 l of laundry water?
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Chemistry, 21.06.2019 20:30
After cloud droplets form, what must happen to them for precipitation to occur?
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Chemistry, 22.06.2019 06:30
(1.6 × 10-19)(5.0 × 106) = c × 10d identify the missing numbers below to show the result of multiplying the numbers.
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Chemistry, 22.06.2019 10:30
Acompound has a molar mass of 92.02 grams/mole, and its percent composition is 30.4% nitrogen (n) and 69.6% oxygen (o). what is its molecular formula? a. n2o4 b. no2 c. n2o d. n4o2
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Chemistry, 22.06.2019 19:10
Astudent completes a titration by adding 12.0 milliliters of naoh(aq) of unknown concentration to 16.0 milliliters of 0.15 m hcl(aq). what is the molar concentration of the naoh(aq)? 1)5.0 m 2)0.20 m 3)0.11 m 4)1.1 m
Answers: 1
Since soap and detergent action is hindered by hard water, laundry formulations usually include wate...
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