Emad G.

11/13/22

A 27.8 mL sample of a 1.20 M potassium chloride solution is mixed with 14.8 mL of a 0.870 M lead(II) nitrate solution and this precipitation reaction occurs: 2KCl(aq)+Pb(NO3)2(aq)→PbCl2(s)+2KNO3(aq)

no of moles of KCl = molarity *volume in L= 1.20*0.0278 = 0.03336 moles KClno of moles of Pb(NO3)2 = molarity *volume in L = 0.87*0.0148= 0.012876... more

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Chemistry

11/09/22

A 1.234 g sample contains only vitamin C (C6H8O6) and sucralose (C12H19Cl3O8)

When the sample is dissolved in water to a total volume of 27.4 mL,27.4 mL, the osmotic pressure of the solution is 5.25 atm5.25 atm at 303 K.303 K. What is the mass percent of vitamin C and... more

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Science Physics Physical Science

12/09/20

speaker and microphone urgent help

. A speaker emits isotropic sound waves at a frequency of 3x103 Hz and a power of 25 Watts. A small microphone has an area of 0.72 cm2 and is located 4.12 meters from the point source. The speed of... more

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Science Biology Maths

06/27/18