Was the gradual color change observed when the sodium thiosulfate (Na2S2O3) crystal was added to the aqueous solution of KI/I2 in Station C evidence of a chemical or physical change? Group of answer choices chemical change physical change
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- Was the gradual color change observed when the sodium thiosulfate (Na2S2O3) crystal was added to the aqueous solution of KI/12 in Station Cevidence of a chemical or physical change?Oceanic uptake of carbon dioxide is thus described:CO2 (g) + H2O ⇔ H2CO3, K = [H2CO3]/PCO2 = 3 x 10-2 M atm-1 H2CO3 ⇔ HCO3- + H+, K = [HCO3-][H+]/[H2CO3] = 9 x 10-7 moles/LHCO3- ⇔ CO32 - + H+, K = [CO32 -][H+]/[HCO3-] = 7 x 10-10 moles/LCharge balance equation:[H+] = [OH-] + [HCO3-] + 2[CO32 ] If the CO2 concentration in the atmosphere is 300 ppm, what is the pH of the ocean?underecfectsol
- Mr. Roy, the principal of a reputed school organized a seminar in which he invited parents and principals to discuss the serious issue of diabetes and depression in students. They all resolved this issue by strictly banning the junk food in schools and to introduce healthy snacks and drinks’like soup, lassi, milk, etc. in school canteens. They also decided to make compulsory half an hour physical activities for the students in the morning assembly daily. After six months, Mr. Roy conducted the health survey in most of the schools and discovered a tremendous improvement in the health of students. After reading the above passage, answer the following: What are the values (at least two) displayed by Mr. Roy? As a student, how can you spread awareness about this issue? What are tranquilizers? Give an example. Why is the use of aspartame limited to cold foods and drinks?Inorganic Chem Please help answering this question Use equation V = (N)(q1)(q2)(k) / r where k = 9.0x10^9On the occasion of World Health Day, Dr. Satpal organized a ‘health camp’ for the poor farmers living in a nearby village. After check-up, he was shocked to see that most of the farmers suffered from cancer due to regular exposure to pesticides and many were diabetic. They distributed free medicines to them. Dr. Satpal immediately reported the matter to the National Human Rights Commission (NHRC). On the suggestions of NHRC, the government decided to provide medical care, financial assistance, setting up of superspeciality hospitals for treatment and prevention of the deadly disease in the affected villages all over India. (i) Write the values shown by (a) Dr. Satpal (b) NHRC. (ii) What type of analgesics are chiefly used for the relief of pain of terminal cancer? (iii) Give an example of artificial sweetener that could have been recommended to diabetic patients.
- If the dissolution of CaCl2•2H2O (147.02 g/mol) is expected to release 44.8 kJ of energy per mole of CaCl2•2H2O dissolved, then what is the expected change in temperature (in oC) if 2.74 grams of CaCl2•2H2O are dissolved in 10.00 mL of water (density of 1.00 g/mL and specific heat capacity of 4.184 J/g•oC)? (Give answer as the absolute value of the temperature change; do NOT include negative sign if temperature decreases.)The value of Ka for nitrous acid (HNO2) at 25∘C is 4.5×10-4 What is the value of ΔG when [H+]= 5.7×10−2 M , [NO2-]= 6.6×10−4 M , and [HNO2]= 0.20 M? Express your answer using one significant figure.2b) What is the primary consideration?
- A potential chemical reaction at 25.0 °C has a ΔHrxn of 138.3 kJ and a ΔSrxn of -394.2 J/K. What is the ΔGrxn in kJ. (Enter answer to 3 significant figures and include no units in your answer)When two people, A and B, push against each other and A falls it is because FB > FA Is the statement true or false if false write the correct one2 C4H10(g) + 13 O2(g) ® 8 CO2(g) +10 H2O(l) What is the ΔH°rxn for the equation above in consideration of the data provided below? ΔH°f C4H10(g) = -124.7 kJ/mol ΔH°f CO2 (g) = -393.5 kJ/mol ΔH°f H2O (l) = -285.8 kJ/mol Question 1 options: 554.6 kJ/mol -5756.6 kJ/mol -6255.4 kJ/mol -3002.1 kJ/mol