In lab, scientists often use percentages to describe concentration. When making a solution, percentage can be expressed as weight over volume (wt/vol) or as weight over weight (wt/wt). When expressing things as % (wt/wt) it usually assumed that 1 mL of water = 1 gram of water. This is similar to assuming molarity (mol/L) equals molality (mol/kg) In lab, 70% (wt/vol) ethanol is frequently used to sanitize the lab bench or research tools such as forceps. In order to produce a final volume of 767 mL of 70% (wt/vol) ethanol, how many mL of 93% (wt/vol) ethanol would you need to add? The percentages can be treated as a concentration. A solution that is 70% ethanol is 70 g of ethanol and 30 mL of water, or 70 g Ethanol out of 100 mL of solution. Therefore, it is possible to use m₁v₁ = m2v2 and use the percentages as the concentration values. Report your answer rounded to two decimal places

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Content Google Do google slid X Dr. Ortiz a ☑ Certificate ☑ > Course EX Cengage L ☑ OWLv2 | O ✓ Search res ChatGPT ✓ + C prod03-cnow-owl.cengagenow.com/ilrn/takeAssignment/takeCovalentActivity.do?locator-assignment-take New Chrome available : E4 CH 16 17 and 18 [References] Question 1 1 pt Question 2 2 pts "Heater Meals" are food packages that contain their own heat source. Just pour water into the heater unit, wait a few minutes, and voilà! You have a hot meal. Mg(s) + 2 H2O(l) → Mg(OH) 2 (s) + H2(g) Question 3 1 pt Species AH° (kJ/mol) S° (J/mol·K) AƒG° (kJ/mol) Question 4 2 pts Mg(s) 0 32.67 0 Question 5 1 pt Question 6 × 2 pts H2O(l) Mg(OH)2(s) -285.83 69.95 -237.15 -924.54 63.18 -833.51 H2(g) 0 130.7 0 Question 7 1 pt Question 8 2 pts Question 9 1 pt HEATER MEALS Question 10 2 pts Question 11 1 pt Question 12 1 pt Question 13 Charles D. Winters INCLUDES 34 ou b HEATER MEALS 1 pt Question 14 1 pt The heat for the heater unit is produced by the reaction of magne- sium with water.…

Find the value of x

help please answer in text form with proper workings and explanation for each and every part and steps with concept and introduction no AI no copy paste remember answer must be in proper format with all working

help please answer in text form with proper workings and explanation for each and every part and steps with concept and introduction no AI no copy paste remember answer must be in proper format with all working

session.masteringchemistry.com/myct/itemView?assignment ProblemID=190556628&offset=next Discussion Question 1: Chapter 6 Homework blem 6.20- Enhanced - with Feedback Enter the symbols for the ions and the correct formula for the onic compound formed by each of the following. esc Q A N F1 2 W S F2 X #3 20 E D F3 с S4 $ OOO 000 R Part E F4 F Enter the symbols for the ions of sodium and phosphorus. Enter the lons formed by these elements and separate your answers with a comma (e.g., Sr²+, As³-). cation, anion = Part F Complete previous part(s) Submit Part G cation, anion Submit Part H Complete previous part(s) 65° V Enter the symbols for the ions of calcium and sulfur. Enter the lons formed by these elements and separate your answers with a comma % Request Answer T Request Answer G 6 ΑΣΦ B ΑΣΦ MacBook Air F6 Y H 18⁰ h & 7 N F7 U * CO 8 J BUT RAS poddany ▶II ? F8 1 ? E 9 K F9 O L (e.g., Sr²+, As³-). 0 Ga3+ and 02-E L F10 P F11

Enter the ions present in a solution of K₂CO3. Express your answers as chemical formulas separated by a comma. Offset subscripts and charges on each ion; for charges, write the number before the + or - sign. View Available Hint(s) 5 Provide Feedback Submit esc ΑΣΦ Mother to Son &....pdf A lock ! 1 F1 Q GOOD A @ 2 N 30 F2 W S ? #3 80 F3 X E I дв control option command D A SA 4 Q F4 C R FL O % 5 & F5 T V MacBook Air 6 G F6 Y B & 7 H F7 U N * 8 J DII FB 1 ( 9 M K FO O ) V H 0 < L F10 P command