Chemistry concepts and calculations

1. Using your measured pH values, calculate the concentration of H (M) in beaker

1. Using your measured pH values, calculate the concentration of H (M) in beakers 1 and 3, before and after the addition of HCI. Organize your answers in a table as shown below. I…

1. V is having the smallest radius among the three. This is a periodic property.

1. V is having the smallest radius among the three. This is a periodic property. The more protons added to the nucleus in the same row, the radius gets shorter because stronger at…

1. Valence Bond Theory alone can be used to determine that O 2 is paramagnetic.

1. Valence Bond Theory alone can be used to determine that O2 is paramagnetic. A) true B) false 2. All intermolecular forces must be overcome in order for a substance to undergo a…

1. Valence shell electron pair repulsion (VSEPR) theory is based on which of the

1.      Valence shell electron pair repulsion (VSEPR) theory is based on which of the following concepts? A. The concept that electrons in a   molecule will repel each other due t…

1. Valence shell electron pair repulsion (VSEPR) theory is based on which of the

1.      Valence shell electron pair repulsion (VSEPR) theory is based on which of the following concepts? A. The concept that electrons in a   molecule will repel each other due t…

1. Valence shell electron pair repulsion (VSEPR) theory is based on which of the

1.      Valence shell electron pair repulsion (VSEPR) theory is based on which of the following concepts? A. The concept that electrons in a   molecule will repel each other due t…

1. W hich of the following gases experiences the greatest degree of deviation fr

1. W hich of the following gases experiences the greatest degree of deviation from (A) CH (B) 0 (C) N2 temperatures? east amoun SeO2 Of Pactcle s uppose you had 1.0 mol samples th…

1. WHATS THE CORRECT NAME FOR P 2 O 5 ? 2. HOW MANY VALENCE ELECTRONS DOES A NEU

1. WHATS THE CORRECT NAME FOR P2O5? 2. HOW MANY VALENCE ELECTRONS DOES A NEUTRAL ATOM OF SILICONHAVE? 3. WHAT AVERAGE TIME IS EXPRESSED USING THESE NUMBERS 90.3,90.2, AND 90.5? 4.…

1. Water cannot be used as the solvent for this experiment. For what types of mo

1. Water cannot be used as the solvent for this experiment. For what types of molecular substances - give specific examples - could water be used as a suitable solvent to determin…

1. Water exhibits a type of magnetism called ___________________ whereby in the

1. Water exhibits a type of magnetism called ___________________ whereby in the presence of a strong magnetic field, the normally not magnetic water reacts to oppose the strong ma…

1. Water is a phase and has what property phase and has what property 2. Alcohol

1. Water is a phase and has what property phase and has what property 2. Alcohol is 3. Paper is the 4. If a component i phase the mobile phase, it will move more along the s more …

1. Water is the product of reaction between an acid and a ______. 2. A Bronsted

1. Water is the product of reaction between an acid and a ______. 2. A Bronsted acid produces _______ ions in aqueous solutions. 3. Hydroxide (OH-) ions are produced by Bronsted _…

1. Water molecule are _______ and the bond between water molecules are ______. 2

1. Water molecule are _______ and the bond between water molecules are ______. 2. The products of fat hydrolysis are ________ and ___________. 3. The hydrolysis of a protein yield…

1. We are interested in increasing the concentration of a SL methanol-water mixt

1. We are interested in increasing the concentration of a SL methanol-water mixture that contains 30% by volume of methanol. The liquid mixture which is initially at 20°C is heate…

1. We can estimate the entropy change when a 100 amino acid protein goes from an

1.     We can estimate the entropy change when a 100 amino acid protein goes from an unfolded to a folded state. This protein follows these rules:                         i.      …

1. We can write A/C = a 1 * 10 -1 + a 2 * 10 -2 + a 3 * 10 -3 + .... Find (a 1 )

1. We can write A/C = a1* 10 -1 + a2* 10 -2   + a3* 10 -3 + ....    Find (a1)16   = _____       where all numbers and variables are in the base 16. 2. ; begin mov m, 0100010100000…

1. We combined ethylene glycol (EG) with adipic acid (AA) to make an n-mer, a po

1. We combined ethylene glycol (EG) with adipic acid (AA) to make an n-mer, a polyester whose molecular weight is 1638 g/mol. The product polyester is endcapped with alcohol funct…

1. We combined ethylene glycol (EG) with adipic acid (AA) to make an n-mer, a po

1. We combined ethylene glycol (EG) with adipic acid (AA) to make an n-mer, a polyester whose molecular weight is 1638 g/mol. The product polyester is endcapped with alcohol funct…

1. We know a lot more about geologic events and the history of the life over the

1. We know a lot more about geologic events and the history of the life over the last 100 million years than we know about the 100 million years before that. Similarly, we know mo…

1. We know that the heat flow takes place from the hot body to the cold body. He

1. We know that the heat flow takes place from the hot body to the cold body. Here the temperature of iron is 50 °C (hot body)  and that of copper (cold body) is 25 °C. Hence, the…

1. We say that electrons in the 3p orbital are \"better shielded\" than those in

1. We say that electrons in the 3p orbital are "better shielded" than those in the 3s orbital. a. Express in your own words what this means. (Identical answers from multiple stude…

1. We showed previously how to calculate enthalpy changes for chemical reactions

1. We showed previously how to calculate enthalpy changes for chemical reactions at various temperatures by using hypothetical paths, which required calculating enthalpy changes u…

1. Weigh out about 0.5 grams of solid copper wire into a 250-mL beaker, recordin

1. Weigh out about 0.5 grams of solid copper wire into a 250-mL beaker, recording in your notebook the precise mass to the nearest milligram. [Include this mass in your lab report…

1. Weight of beaker (g) 2- weight of beaker and ferrous ammonium sulfate 3. Weig

1. Weight of beaker (g) 2- weight of beaker and ferrous ammonium sulfate 3. Weight of filter paper (g) 4· Weight of filter paper and product (g) a hexahydrate (g) Be 3-00 9 5. wei…

1. Weight of benzaldehydeusea in stop 2.-hto--g used in step 2. The molecular we

1. Weight of benzaldehydeusea in stop 2.-hto--g used in step 2. The molecular weight of benzaldehyde is 106.1 g/mole. 110A) male .03 Show your calculations. Weight of crude benzoi…

1. What 3- ion has the following ground state electron configuration? 1s2 2s2 2p

1. What 3- ion has the following ground state electron configuration? 1s2 2s2 2p6 3s2 3p6         oxide ion         nitride ion         sodium ion         aluminum ion         pho…

1. What Solvent would you choose to carry out the following reaction? CH 3 CH 2

1. What Solvent would you choose to carry out the following reaction? CH3CH2O-H + Na+  -:H -------> CH3CH2O-  Na+ + H2 2. Starting with 3-methylbutyne and ethyl bromide, show h…

1. What affects gasoline car mileage? A. Remember, as one of the first steps in

1. What affects gasoline car mileage? A. Remember, as one of the first steps in planning your investigation, you may need to narrow your original question. B. Then write a hypothe…

1. What aldehyde is formed when valine is treated with ninhydrin? A mixture of s

1. What aldehyde is formed when valine is treated with ninhydrin? A mixture of seven amino acids (glycine, glutamate, leucine, lysine, alanine, isoleucine, and aspartate) is separ…

1. What amount of solute is present in each of the following solutions? a. 750 m

1. What amount of solute is present in each of the following solutions? a. 750 ml of 2.00 M HNOs (1.50 moles, 94.5g) b. 450 ml of 1.25 M Ci2H22011 (0.562 moles, 192g) 2 whatis the…

1. What are 3 ways in which acids and bases can be defined? 2. What happens when

1. What are 3 ways in which acids and bases can be defined? 2. What happens when acids and bases are put into an aqueous solution? 3. How does the amount of dissociation of an aci…

1. What are biofilms? a. Thin layers of bacteria that are identically replicated

1. What are biofilms? a. Thin layers of bacteria that are identically replicated. b. complex arrangements of bacteria that appear to "sense" other cells and regulate their genes f…

1. What are different ways that water is contaminated (i.e. unusable for human c

1. What are different ways that water is contaminated (i.e. unusable for human consumption or for irrigation)? What are some steps taken to make it usable? 2. What is acid rain an…

1. What are the charges on the O for equation A, B,C 2. What are the charges on

1. What are the charges on the O for equation A, B,C 2. What are the charges on the C for equation A,B,C 3. What are the charges on the N for equation A,B,C 4. Which resonance for…

1. What are the criteria for spontaneity in terms of entropy? A. In any spontane

1. What are the criteria for spontaneity in terms of entropy? A. In any spontaneous process the entropy of the universe decreases B. In any spontaneous process the entropy of the …

1. What are the four indicators that allow someone to know that a chemical react

1. What are the four indicators that allow someone to know that a chemical reaction has taken place? 2. What will you be looking for to know if a gas has been produced in a chemic…

1. What are the hazards associated with sodlum hydroedde (NaOH) solution? 2. wha

1. What are the hazards associated with sodlum hydroedde (NaOH) solution? 2. what buret reading should you record when the uquid level is as shownin Figure 2 b) How will you recog…

1. What are the objectives of software engineering? 2. What techniques do the ob

1. What are the objectives of software engineering? 2. What techniques do the object - oriented and process - oriented paradigms share? 3. What are the dangers of not following a …

1. What are the objectives of the change management process? 2. What is the role

1. What are the objectives of the change management process? 2. What is the role of the change control board or product development group? 3. Describe the three different platform…

1. What are the oxidation states of sulfur and fluorine, respectively, in the mo

1. What are the oxidation states of sulfur and fluorine, respectively, in the molecule, SF6? 2. Which reaction and statement correctly describes the electro-chemical cell shown an…

1. What are the principal saturated fatty acids found in edible fats and oils an

1. What are the principal saturated fatty acids found in edible fats and oils and what relative percentages could be expected in animal vs. vegetable fats? 2.  Partially hydrogena…

1. What are the two pK a values for carbonic acid? What is the pH of a 0.100M so

1. What are the two pKa values for carbonic acid? What is the pH of a 0.100M solution of potassium bicarbonate? What is the pH of a 0.100M solution of potassium carbonate?   2. St…

1. What are the water of hydration? 2. What does the dot mean in Salt•nH2O 3. Wh

1. What are the water of hydration? 2. What does the dot mean in Salt•nH2O 3. What is the significance of 0.003 g? 4. What will happen if you put the bis-ethylenediamine copper (|…

1. What are these bubbles? d.evaporated water 7. Calculate the concentration of

1. What are these bubbles? d.evaporated water 7. Calculate the concentration of each solution in mass percent. Part A 147 g KCl in 568 g H2O Part B 30.3 mg KNO3 in 7.81 g H2O Part…

1. What can be done to improve the speed and handling of a snowboard on snow? A.

1. What can be done to improve the speed and handling of a snowboard on snow? A. Remember, as one of the first steps in planning your investigation, you may need to narrow your or…

1. What can one do to obtain a second crop of crystals after initial crystals ha

1. What can one do to obtain a second crop of crystals after initial crystals have been collected? What is the drawback of this method? 2) You are given a unknown white solid to r…

1. What can one do to obtain a second crop of crystals after initial crystals ha

1. What can one do to obtain a second crop of crystals after initial crystals have been collected? What is the drawback of this method? 2) You are given a unknown white solid to r…

1. What change will be caused by the addition of a small amount of HCl to a solu

1. What change will be caused by the addition of a small amount of HCl to a solution containing roughly equimolar amounts of HF and NaF? a) conc of hydronium ions would increase s…

1. What change would you expect on the rate of the S N 2 reaction of 1-iodo-2-me

1. What change would you expect on the rate of the SN2 reaction of 1-iodo-2-methylbutane with cyanide ion if the nucleophile concentration is halved and the alkyl halide concentra…

1. What class of enzyme catalyzes both of the reactions of ethylene glycol? 2. T

1. What class of enzyme catalyzes both of the reactions of ethylene glycol? 2. The following is a segment of the template strand of human BRCA1 gene : 3 TGG AAT TAT CTG CTC TTC GC…