08/02/20
Calculate the volume of concentrated HCl needed to prepare 250 mL of 0.1M HCl. (Concentrated HCl has a density of 1.188 g mL–1 and is 37 wt %).
can anyone please help me with this question, I have tried it I got volume= 0.8 M
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06/16/20
Why is it incorrect to say that a gas sample of helium at 50 degree Celsius is twice as hot as a sample of helium at 25 degree Celsius? Describe your answer using words, math, and/or pictures.
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06/02/20
The ksp of pbl2 is 7.9*10^-9. What is the expected concentration of lead ions in solution? a)1.3*10^-3 mol/L b)1.6*10-3 mol/L c)none of these d)2.0*10-3 mol/L
The ksp of pbl2 is 7.9*10^-9. What is the expected concentration of lead ions in solution?a)1.3*10^-3 mol/Lb)1.6*10-3 mol/Lc)none of thesed)2.0*10-3 mol/L
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06/02/20
Which of the following is a conjugate acid- base pair?
Which of the following is a conjugate acid- base pair?a)all of theseb)HS^- and H2Sc)None of thesed)H2PO4^- and HPO4^2-e)NH3 and NH4^+
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06/02/20
Which of the following is a conjugate acid- base pair?
Which of the following is a conjugate acid- base pair? a)all of theseb)NaF and F^- c)None of thesed)HI and I^-e)HNO3 and HNO2
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