Calculate molality of a 10.0% NaCl (aq) (MM= 58.44g/mol)
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Calculate molality of a 10.0% NaCl (aq) (MM= 58.44g/mol) please write out steps so I can...
What is the molality of NaCl (58.5 g/mol) in an aqueous solution which is 4.2 molar? The density of the solution is 1.05 g/mL. ANSWER: 5.22 m Please, show the steps using dimensional analysis if possible. Thank you
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A chemist designs a galvanic cell that uses these two half-reactions: half-reaction standard reduction potential N (9)+4H2O(1)+4e → N H (aq)+4 OH (aq) Ered = -1.16 V Zn²+ (aq)+2e → Zn(s) Exped=-0.763 V Answer the following questions about this cell. Write a balanced equation for the half-reaction that happens at...
please help, with CLEAR steps so I can follow along please! 1a. 5.0 g of O2 (g) and 5.0 g of N2 (g), both at 35°C, are added to a 350-mL container. Calculate the total pressure in the container. Express answer in atm. b. When 0.500 g zinc is added to excess hydrochloric acid, H2 gas is formed. Calculate the volume of gas formed at STP, assuming 100% yield. Zn (s) + 2HCl (aq) —> ZnCl2 (aq) + H2 (g)
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1.) The HS Registrar has asked you to design an encoding of class year ("Freshman", "Sophomore", "Junior", "Senior") that will enable single bit error correction. Give an appropriate 5-bit binary encoding for each of the four years.
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4) Phenylacetic acid (CaHsCH COOH, simplified here to HPAc) builds up n COOH, simplified here to HIP phenylketonuria, an inherited disorder that, if untreated, causes of phenylacetic acid using this information (10 pts.) at the pH of a 0.12 M solution of HPAc is 2.62. calculate the Ka НРАс (aq) + H2O...
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Calculate Ksp for the salt NaCl at 25°C. Substance Na+(aq) Cl'(aq) NaCl(s) DGfº(in kJ/mol) -2620 -131.0 -383.8 4.1 O 41 O 1.7' 1019 O 0.41 O 9.2
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5. A sphere weighing 2.5 kN has a radius of 0.15 m. What forces does the sphere exert on the inclined surfaces? W-2.5kN 30 75
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-Solve the equation 8*+3 = 42x-1
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4) Let (2) = 2* - 202. (a) Use the Closed Interval Method to determine the absolute extrema of S on the interval (0,2). (b) Sketch showing the intercepts on the axes, the local extrema, and concavity the entire graph of f. (5 marks) [10 marks]
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Q4 On mountainous downhill roads, escape routes are sometimes placed on the side of the road for t Assuming a constant upward slope of 26, calculate the horizontal that slowed from 110 km to rest in 7.0 seconds. (see proble Ch 3, page 72, #53). rucks whose brakes might fail. and vertical...