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Chemistry What to do?

Chemistry What to do? Topic: Chemistry What to do?
June 25, 2019 / By Cass
Question: Hey peeps Idk what to do with a lab i have. The question is asking: Determine the moles /L and pH of the acid. What do i need to do to solve this problem. -do i need the molar mass? I have no clue what im doing lol.
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Anita Anita | 9 days ago
You've not given enuf information. duh. you don't need the molecular weight if you have an alternative way to calculate number of moles. PV=nRT, freezing point depression, beers law, the list goes on and on. Otherwise, yes you need the weight and the molar mass. for pH. duh. again not enuf info. pH in water? with no other ions present? strong acid or weak? if strong acid then M =>[H+] ->pH otheriwse you either need to calculate it or measure it.
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Anita Originally Answered: Can someone help me solve this chemistry problem on nuclear chemistry?
Plug in the values you have 0.00307g of matter c = 3.0 x 10^8 so E= 0.003.07 x c^2 E= 2.763 x 10 ^14J = 2.763 x 10^8 MJ 2) 5.98 MJ = mc^2 5.98MJ / c^2 = m 5.89x 10^6 / 9 x 10 ^16 = 6.5 x 10 ^-11 grams
Anita Originally Answered: Can someone help me solve this chemistry problem on nuclear chemistry?
because of the certainty the mass sort of the two nuclei is an identical, the great sort of protons and neutrons is comparable. Carbon has 6 protons and 5 neutrons. Boron has 5 protons and six neutrons. this shows between the carbon’s protons has replace precise right into a neutron. The can value of a proton is +a million. The can value of a neutron is 0. +a million + x = 0, x = -a million The can value of the particle is -a million. A beta particle has a can value of -a million and an identical mass as an electron. Proton + ?- ? Neutron OR Proton + e- ? Neutron C + ?- ? B OR C + e- ? B Mass of proton = a million.67265 * 10^-27 kg Mass of neutron = a million.67495 * 10^-27 kg The mass of a neutron is larger desirable than the mass of proton, because of the certainty a neutron has beta particle indoors it! jointly as the particle we call an electron is indoors the nucleus, we call it a beta particle!

Wilson Wilson
there has to be more information in the question. that is needed to answer the question. if i does not give you any more information that you cant not answer it
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Wilson Originally Answered: GAS LAW CHEMISTRY PROBLEM-Please see chemistry problem in details below. I have no idea how to do this please help!?
Regardless of whether the acid is monoprotic (HA), diprotic (H2A), or triprotic (H3A), the number of moles of CO2 produced equals the number of moles of NaHCO3. Also, the number of moles of NaHCO3 is going to be a whole number multiple of the moles of acid. e.g. NaHCO3 + HCl ==> H2O + CO2 + NaCl 2NaHCO3 + H2SO4 ==> 2H2O + 2CO2 + Na2SO4 3NaHCO3 + H3PO4 ==> 3H2O + 3CO2 + Na3PO4 Since CO2 is the only gas produced in the reaction, volume CO2 = 36 L. Temperature = 81 F; C = (81-32)/1.8 = 27 C (+273) = 300 K Pressure = 1009 mb x (1013 mb / 1 atm) = 0.996 atm PV = nRT n = PV / RT = (0.996 atm)(36 L) / (0.0821 L atm / K mole)(300 K) = 1.46 moles CO2 = 1.46 moles of NaHCO3 moles acid = Molarity acid x L acid = (7.96)(0.100) = 0.796 moles acid The mole ratio of NaHCO3 to acid is 1.46 / 0.796 = 1.83, which is NOT a whole number. Somebody is mistaken!
Wilson Originally Answered: GAS LAW CHEMISTRY PROBLEM-Please see chemistry problem in details below. I have no idea how to do this please help!?
Assume a monoprotic acid HA then HA + NaHCO3 ---> NaA + CO2 + H2O one mol acid gives 1 mol CO2 gas Now calculate the molarity of the acid from the volume of gas produced to see if the reported concentration is correct. Use the ideal gas equation to find the mol CO2 PV = nRT rearrange to n = PV/RT R = 0.08206 L.atm/mol.K so convert the pressure from 1009 mb to atm, the temperature from 81 F to K, and the volume is 36 L, n is mol CO2 The mol CO2 (n) produced is the same as the mol HA in 100 mL, so find molarity from the equation M = n/V

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