Please answer the followary tihemochenstry questans. a) How anuch heat linjoules) is needed to rase the temmperatene 35g b) Hiaw mary Kilejoules of heat ave requ'ed to heat 2550 Of Water foam 17.5°C to 100.0°C? c) what mass of iron (c0.1 Jlarc) walld need 875J of eneugu in ader to raise its femperature by 3.5°C? of ethonad Co-24J1gC) ay of 63°C? goms C> 0.1

An electric current of 32.30 A flows for 528. milliseconds. Calculate the amount of electric charge transported. Be sure your answer has the correct unit symbol and the correct number of significant digits.

Please send me the question in 20 minutes it's very urgent plz

Reactions of Na₂CO3 * Reactions with a carbonate salt and acid are gas evolving! I Na₂CO3(aq) Na* CO3²- Na2CO3(aq) Na₂CO3 (aq) Na₂CO3(aq) Na₂CO3 (aq) Na₂CO3 (aq) Na2CO3 (aq) Na₂CO3 (aq) Na₂CO3 (aq) Na₂CO3 (aq) + + + + 2 Pb(NO3)2 (aq) H* CI HCl (aq) Na3PO4 (aq) KI (aq) CuSO4 (aq) H₂SO4 (aq) NaOH (aq) AgNO3(aq) CaCl2 (aq) HNO3(aq) →>> →> →>>> ➜>> ↑ ↑ Na Cl + H* CO3²- NaCl (aq) + [H₂CO3 (aq)] → NaCl (aq) + H₂O (1) + CO2 (s) 2 NaCl (aq) + H2₂O (1) + PAGE 123 OF 232 (g)

O.002015 mol 4. For the acid in Option do the following: HO,CCH,C H2 CH,CO2H a) Draw a Lewis structure of the acid and mark the acidic hydrogen(s) with an asterisk (*). (Hint: Organic acids, those composed of C. H. and 0, will have the partial structure "HO2C-" or "-CO2H" written in the formula, In these cases, both oxygens are bonded to the carbon and the hydrogen is bonded to one of the oxygen atoms) b) Draw a structure of the conjugate base of the acid you drew in 4a) c) Draw a structure of the conjugate base of the species for which you drew a structure in 4b) d) Which of the structures you've draw above (4a, 4b, or 4c) can act as both an acid and a base? Write appropriate chemical equations to explain your answer. Xavier University of Louisiana 176

Táke off any gridlines and add a title and axes labels. Add the trendline and the relevant equation. b) If a sample was analyzed and the current was measured to be 5.18 mA, what is the concentration of analyte in the sample? 5.18= 3.403x + 1.9232 3.2368=3.4403 x 0.947: x Pentane (C5H12) is a liquid with density of 0.929 g/mL at 25 °C. Find the true mass of pentane when the mass in air is 14.82 g. Assume air density is 0.0012 g/mL.

Beyond the Course: Your beverage company is branching out from added sugar in their beverages to make a drink where the main ingredient is fresh-squeezed orange juice, called Beverage C. Yum! The beverage will still be subjected to the same taxes as Beverages A & B, so determining sugar content is still vital. Suggest a method of reliably examining the sugar concentration in each batch of Beverage C. Some considerations to address: Do you want to measure the same property for Beverage C as you did for Beverages A & B? ● Can you use the same calibration curve as you did for Beverages A & B? Describe the considerations you made when determining your method.

00 mL of a diprotic acid primary standard solution was accurately prepared to a concentration of 0.1431 M.  Three samples of this primary standard solution were used as samples in a titration to standardize an aqueous solution of sodium hydroxide, NaOH, which would be used as a titrant. Using the following table of data for the titration of the primary standard acid with NaOH, calculate the average concentration of NaOH.   Trial # Volume of primary standard Initial titrant volume Final titrant volume 1 10.00 mL 8.21 mL 27.22 mL 2 10.00 mL 27.22 mL 46.23 mL 3 10.00 mL 30.28 mL 49.29 mL        0.1506 M      0.0753 M      0.0376 M      0.1431 M      0.0526 M

Select one for each box

7. Don believes that fewer than one-third of the students at his college hold part-time jobs while in school. To investigate this, he randomly surveyed 116 students and found that 32 students held part-time jobs. a. ( - Provide a 90% confidence interval for the population proportion of students that hold a part-time job. b. 1 (a). ;Give the correct interpretation of the interval in part c. Extra Credit: Does this interval support Don's claim? Why?