2) A compound with an empirical formula of C4H4O and a molar mass of 136 grams per mole. 3) A compound with an empirical formula of CFBrO and a molar mass of 254.7 grams per mole. 4) A compound with an empirical formula of C2H8N and a molar mass of 46 grams per mole. a. P2O3 b. C2H3 c. CH3O d. BrCl2 e. C3H4O3 f. C5H11 g. CuCO2 h. HgF 2. a. Fe3O4 b. CCl2F2 c. CH2 3. a. C5H10 b. NO2 Molecular Formula Worksheet ANSWER KEY Write the molecular formulas of the following compounds: 1) A compound with an empirical formula of C2OH4 and a molar mass of 88 grams per mole. C4O2H8 2) A compound with an empirical formula of C4H4O and a molar mass of 136 grams per mole.
0.05mol/6M=8.3*10-3 L=8.3mL stock solution c. 100mL-8.3mL=91.7mLwater Add 91.7 water to 6M stock solution to prepare 0.5M acetic acid. Exercise 8: a. 42.35 - 0.55 = 41.8 mL b. The moles of EDTA4- : 0.0189M*(41.8*10-3)L=7.9*10-4mol c. Zn2+(aq)+EDTA4-(aq)—Zn(EDTA)2-(aq) The ratio Zn2+ and EDTA4- is 1:1 The moles of Zn2+= the moles of EDTA4-=7.9*10-4mol d. 7.9*10-4mol*65.39g/mol=0.0517g Zn e.
Introduction When it comes to potatoes, Canada has a well earned reputation of being ranked the 12th largest potatoes producer in the world. Potatoes are high in nutrients and it fairly easy to grow in almost all climates and produces plentifully. Potatoes are an immense part in everybody lives as it is essential to a persons nutrition. The potato, now grown worldwide was discovered by Spanish explorers in Peru around the 16th century. Understandably, potatoes are the most important vegetable here in Canada, farms covering more than 160,700 hectares of farmland.
Empirical formula: CH5N Steps for molecular formula: 1- Calculate the molar mass of the empirical formula. 2- Divide the known (given) molar mass by the calculated empirical formula molar mass to get a whole number 3- Multiply that whole number through subscripts of the empirical formula to obtain the molecular formula. Example CH5N 12.01 g C x 1 C= 12.01 g/mol 1.008 g H x 5 H = 5.040
6. Copper has two stable isotopes,[pic]and [pic], with masses of 62.939598 amu and 64.927793 amu, respectively. Calculate the percent abundances of these isotopes of copper. 7. Chromium has four naturally occurring isotopes: chromium – 50 (4.35% at 49.946 amu) chromium – 52 (83.79% at 51.941 amu) chromium – 53 (9.50% at 52.941 amu), and chromium – 54 (2.36% at 53.939 amu) Calculate the average atomic mass of
2) Percent recovery for isolation of benzoic acid % Recovery = mass of recovered material _________________________________ x100% mass of starting material = (0.43/1.01) x100% = 42.57% That concludes that the percent recovery is 42,57%. 3) Percent recovery for isolation of hydroquinone dimethyl ether % Recovery = mass of recovered material _________________________________ x100% mass of starting material = (0.16/1.01) x100% = 15.84% That concludes that the percent recovery is 15.84%. Table 2: : Experimental IR peaks compared to literature IR peaks for Benzoic acid Functional groups | Experimental peak (cm-1) | Literature peak (cm-1) | O-H | 3407-2563 | 3400-2564 | C=O | 1689 | 1689 | C-H |
A(blue) B(orange) C(red) Total Total Mass(g) 28.05g 8.58g 7.3g 43.93g Number 32 11 8 51 Average Mass(g) 0.876g 0.78g 0.913g 0.861g Relative Abundance 0.6275 0.2157 0.1569 1.000 % Percent Abundance 62.75% 21.57% 15.69% 100% Relative Mass(g) 0.5497g 0.1682g 0.143g 0.8608g IV. Data Chart- V. Analysis- 6. Relative abundance is a specific type of particles divided by the total particles expressed as a number while percent abundance is expressed as the percentage of those specific particles within the total particles. When you add up the individual relative abundances, the result is 1.000. When you add up the individual
Add 2 bottles of Newman’s Own Light Lime Vinagrette and Boil-in-bag Cajun seasoning. Put in onions, eggs(if desired) and garlic. Let ingredients come to a rolling boil and then add the sausage. After 10 min, add the potatoes. Let 10 more minutes pass then add the corn-on-the-cob.
The type of food that Mayan’ ate were what American’s eat now, or present day. Maize, or corn was the most important and nutritious food they ate. The Mayan culture of food was beans, squash, and maize. Ancient Maya ate rice, wheat, chicken, and pigs. After maize was dried it was ground up to make a flat, dry pancake, known as tortillas.
It is a ‘Braised pork ribs and Cabbage’ it is using a pork ribs and cabbage and bit onion, garlic and ginger to cook. Pork provide humanity with high quality protein and essential fatty acids. Pork available the heme (organic iron) and cysteine promote iron absorption, can improve iron deficiency anemia. Cabbage is also good for body cabbage is rich in vitamin C, E, eat cabbage, can play a very good skin care and beauty effects. Pork provide humanity with high quality protein and essential fatty acids.