To what class of compounds does glucose belong? A) cyclic ketone B) cyclic aldehyde C) cyclic acetal D) cyclic hemiacetal E) cyclic acid 10. What is the product of reduction of 2-butanone? A) butanal B) 2-butanol C) butanoic acid D) 1-butanol E) no
The indicator bromthymol blue has a Ka of 1.00 x 10-7. If a 2.00 x 10-3 M solution of the indicator is used, what will be the [H3O+] at the end point, at the intermediate colour between yellow and blue? a) 2.00 x 10-10 M b) 1.00 x 10-7 M c) 5.00 x 10-5 M d) 3.16 x 10-4 M 7. What is the pH of a 0.0100 M hydrochloric acid (HCl) solution? a) 1.00 x 10-2 b) 0.0100 c) 2.000 d) 12.000 8.
A. CH2 B. C3H8O C. C5H10 D. K2Cr2O7 10. The molar mass of glucose is ______ (H = 1, C = 12, O = 16) A. 24g B. 53g C. 180g D. 342g 11. When referring to mass sum of the atomic masses of the atoms represented by the formula of a molecular substance, the correct term used is A. atomic mass B. formula weight C. molecular mass D. molecular weight 12.
• C4H8Br2 • C2H4Br • CHBr • C6H12Br3 5. An unknown compound with a molar mass of 155.06 g/mol consists of 46.47% C, 7.80% H, and 45.72% Cl. Find the molecular formula for the compound. • CHCl • C9H18Cl3 • C6H12Cl • C6H12Cl2 6. Which one of the following is an example of a balanced chemical reaction?
8.1 5) Based on the octet rule, iodine most likely forms an __________ ion. A) [pic] B) [pic] C) [pic] D) [pic] E) [pic] Answer: E Diff: 1 Page Ref: Sec. 8.1 6) There are __________ unpaired electrons in the Lewis symbol for an oxygen atom. A) 0 B) 1 C) 2 D) 4 E) 3 Answer: C Diff: 1 Page Ref: Sec. 8.1 7) How many unpaired electrons are there in the Lewis structures of a [pic] ion?
The two nucleotide strands that make up DNA run in opposite directions, one runs from 3’ to 5’ and the other runs from 5’ to 3’. The 5’ end is where the phosphate is positioned and 3’ is where the deoxyribose sugars are. The organic bases (base pairings) are split up into two groups; pyrimidines and purines. The pyrimidines are made of a single six-sided ring and in terms of DNA the bases that apply to this group are cytosine and thymine. Purines however are made of a six-sided ring joined to a five-sided ring.
Given your knowledge of sequence similarity measures, which color is least desirable? Most desirable? Explain. A low e-value and a high score is the best indicator of a high match strength. Therefore, red is the most prevalent and with a score of 1548 and e-value of 0, seems to be the most desirable.
Thearesa Lima 1/8/13 Unit 8 – Assignment SC155 – Intro to Chemistry 1. Which is the strongest antacid, on a single-dose basis? Which is the weakest? Explain and show your calculations. Moles of NaOH = 0.05molL Maalox - 0.05mol/L x 24.1mL = 1.205mmol/1000 = .001205 mol Tums - 0.05mol/L x 22.4mL = 1.120mmol/1000 = .00112 mol Mylanta - 0.05mol/L x 20.0mL = 1.00mmol/1000 = .001 mol CVS - 0.05mol/L x 19.9mL = 0.995mmol/1000 = .000995 mol Rennies - 0.05mol/L x 24.4mL = 1.220mmol/1000 = .00122 mol The strongest is CVS brand because less HCI was left over (0.00995) which means it used the least amount of NaOH to neutralize the acid.
• When it is on the very outside level away from the nucleus A valence electron is one that occupies the highest energy level for any electron in a particular neutral atom. • Valence electrons are the electrons in the outermost energy level of an atom — in the energy level that is farthest away from the nucleus. When chemists study chemical reactions, they study the transfer or sharing of electrons. 6. Are the following substances acid, base, or neutral: sodium bicarbonate (pH = 8.3): Neutral Blood (pH = 7.4):Neutral milk (pH =6.7): Neutral
A. True B. False 3. Which of the following coenzymes are involved in carrying reducing equivalents from intermediary metabolism to the electron transport chain for oxidative phosphorylation? A. Nicotiamide adenine dinucleotide B. Flavin adenine dinucleotide C. Thiamin pyrophospate D. All of the above E. A and B 4.