Tina is waiting at the bus stop. She sees and hears an ambulance as it approaches and passes by her. Which two changes in the loudness of the siren does Tina hear? The sound becomes less loud as the ambulance approaches her. The sound becomes louder as the ambulance approaches her. The loudness of the sound remains the same as long as she can see the ambulance. The sound stops when it reaches her. The sound becomes less loud as the ambulance moves away from her.
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Chemistry, 22.06.2019 08:00
Nconcentration refers to the molar concentration of an ion in solution. it may be identical to, or greater or less than, the molar concentration of the compound containing the ion that was used to make the solution. for soluble salts, the molarity of a particular ion is equal to the molarity of that compound times the subscript for that ion. for example, 1 m of alcl3 is 1 m in al3+ and 3 m in clâ. 1 m of (nh4)2so4 is 2 m in nh4+ and 1 m in so42â. part a what is the concentration of k+ in 0.15 m of k2s? view available hint(s) nothing m m part b if cacl2 is dissolved in water, what can be said about the concentration of the ca2+ ion? view available hint(s) if is dissolved in water, what can be said about the concentration of the ion? it has the same concentration as the clâ ion. its concentration is half that of the clâ ion. its concentration is twice that of the clâ ion. its concentration is one-third that of the clâ ion. part c a scientist wants to make a solution of tribasic sodium phosphate, na3po4, for a laboratory experiment. how many grams of na3po4 will be needed to produce 550 ml of a solution that has a concentration of na+ ions of 0.700 m ? express your answer numerically in grams. view available hint(s) mass of na3po4 n a 3 p o 4 = nothing g provide feedback
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Chemistry, 22.06.2019 08:00
This classification of drug typically changes the brain's chemistry and reduces its ability to create its own endorphins.
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Chemistry, 23.06.2019 00:00
What is the approximate mass of 25 cm3 of silver, if the density is 10.5 g/cm3? a. 0.42 g b. 2.4 g c. 42 g d. 260 g
Answers: 1
Tina is waiting at the bus stop. She sees and hears an ambulance as it approaches and passes by her....
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