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Lindy F.

Chemistry 102

41 minutes ago

Describe the results for both saturated and unsaturated samples in Baeyer and Ignition tests. Why do they have different reaction behaviors?

GK

George K.

Chemistry 102

52 minutes ago

. Calculate the mass of each of the following amounts: a. 1.22 mol sodium

jd

Jose D.

Chemistry 102

3 hours ago

Effect of volume change on the equilibrium: N2O4(g) ? 2 NO2(g) at 25 oC. Volume (L) [N2O4]eq [NO2]eq Kc values 1.00 0.221 0.159 0.114 2.00 0.0873 0.105 0.114 3.00 0.0589 0.0821 0.114 Comment on the values of Kc. In which direction (forward or reverse) the equilibrium shifts with increasing volume? Explain your answer.

EK

Emre K.

Chemistry 102

8 hours ago

a) Select an atom and calculate its charge and mass in terms of energy and grams . LetÔÇÖs select Mg atom (12 protons, 12 neutrons) as an example. b) Select a molecule and calculate its charge and mass in terms of energy and grams/mole. LetÔÇÖs select MgCl2 ( Cl contains 17 protons and 18 neutrons) as an example

jd

Jose D.

Chemistry 102

11 hours ago

Consider the reaction at equilibrium: C(s) + H2O(g) ----- > CO(g) + H2(g). Predict whether this reaction shifts left, shifts right, or remains unchanged when subject to the following changes (disturbances): Carbon is added to the reaction mixture. Volume of the container is decreased.

KF

Krisha F.

Chemistry 102

13 hours ago

Brass is a substitutional alloy consisting of a solution of copper and zinc. A particular sample of yellow brass consisting of 65.0 % Cu and 35.0 % Zn by mass has a density of 8470 kg/m3. (a) What is the molality of Zn in the solid solution? (b) What is the molarity of Zn in the solution?

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Lqwl2Ll1 A.

Chemistry 102

14 hours ago

Help please

la

Lqwl2Ll1 A.

Chemistry 102

14 hours ago

help please

la

Lqwl2Ll1 A.

Chemistry 102

17 hours ago

help

la

Lqwl2Ll1 A.

Chemistry 102

17 hours ago

help

LL

Lefa L.

Chemistry 102

20 hours ago

Copper has 29 protons and nickel has 28 protons. The copper isotope ^64Cu decays into the nickel ^64Ni by emitting...

SC

Shivani C.

Chemistry 102

23 hours ago

Obtain 10.0 mL of 0.400 M Cu(NO3)2 (aq) stock solution in a 10 mL graduated cylinder. Determine what volume is required to make 10.00 mL of 0.200 M Cu(NO3)2 (aq). Use a volumetric pipette to transfer this volume of the stock solution into a clean test tube. Then add a sufficient amount of distilled water to reach 10.00 mL. Thoroughly mix the solution. Repeat the dilution process to make 10.0 mL each of three more additional dilute solutions that are 0.100 M, 0.0500 M, and 0.0250 M, respectively. You will only need about a 5 mL sample of each solution.

MM

Minnie M.

Chemistry 102

None

researcher wants to perform an acid/base reaction using methanol (MeOH) as the solvent. Which of the following bases would NOT be suitable? NEt3 NaOAc PhONa PhLi

jd

Jose D.

Chemistry 102

1 day ago

Given the equilibrium reaction A(aq) ? 2 B(aq) Initial concentration of [A]. = 0.41 Initial concentration of [B] = 0.21 Find the equilibrium concentration of [A] and [B]

LG

Lizzy G.

Chemistry 102

1 day, 2 hours ago

A solution NaOH(aq) contains 8.5 g NaOH(s) per 100.0 mL of solution. Calculate the pH and the pOH of the solution at 25 ┬░C.

GW

Grace W.

Chemistry 102

None

The atomic masses of 35/17 * C * l (75.53 percent ) and 17 ^ 37 Cl 24.47 percent) are 34.968 amu and 36.956 amu, respectively . Calculate the average atomic mass of chlorine . The percentages in parentheses denote the relative abundances

jd

Jose D.

Chemistry 102

1 day, 5 hours ago

In which one of the following reactions Kc = Kp? 4 NH3(g) + 3 O2(g) ? 2 N2(g) + 6 H2O(g) 2 SO3(g) + 2 NO(g) ? 2 SO2(g) + 2 NO2(g) 4 N2(g) + 2 O2(g) ? 4 N2O(g) 6 SO2(g) + 3 O2(g) ? 6 SO3(g)

bz

Bri Z.

Chemistry 102

1 day, 6 hours ago

1) A sample of dolomitic limestone, with a mass of 0.9142 g, is reacted with hydrochloric acid. The mass of carbon dioxide released is 0.4373 g. Assuming the sample has a 1:1 mole ratio of MgCO3 to CaCO3, determine the mass, in grams, of MgCO3 and CaCO3 in the sample. 2) A 25.00 mL sample of water, buffered at a pH of 10, is titrated with 0.008989 M EDTA using the Calmagite indicator. A volume of 8.15 mL of EDTA is required. Determine the hardness of the water sample in ppm.

PJ

Pavan J.

Chemistry 102

1 day, 7 hours ago

Clonidine is used to treat high blood pressure and certain anxiety disorders. It is classified as an ?2 adrenergic agonist that has been in clinical use for over 40 years. Oxymetazoline is a partial ?2 adrenergic agonist topical decongestant, used in products such as Vicks Sinex, Visine L.R., Sudafed OM, and Zicam etc. As you are aware, norepinephrine (noradrenaline) is an endogenous ligand for this receptor. Assuming Clonidine and oxymetazoline have greater affinity for the receptor than noradrenaline, draw the dose response curves for all three drugs on a single graph.

PJ

Pavan J.

Chemistry 102

1 day, 7 hours ago

Describe the terms IND, NDA, ANDA and explain their significance in drug discovery.

PJ

Pavan J.

Chemistry 102

1 day, 7 hours ago

Irinotecan hydrochloride is an anti-cancer drug used to treat metastatic colon cancer and some lung cancers. Why is this drug formulated as a salt form? Identify all the possible sites on this molecule (with Roman numerals I, II, III, etc.) that are ionizable at physiological pH and draw the structure of the most prevalent monoprotonated hydrochloride salt form of this drug. Irinotecan is in fact a pro-drug, which is hydrolyzed to the therapeutically active compound. Using curved arrow formalism; show the general mechanism for the esterase-induced hydrolysis of irinotecan.

PJ

Pavan J.

Chemistry 102

1 day, 7 hours ago

Describe the steroidogenesis pathway and identify two different classes of drugs (along with their mechanism of action) that have been discovered involving this pathway

PJ

Pavan J.

Chemistry 102

1 day, 7 hours ago

Describe the folate biosynthesis and metabolism pathways and identify three different classes of drugs (along with their mechanism of action) that have been discovered involving these pathways

PJ

Pavan J.

Chemistry 102

1 day, 7 hours ago

What does a lead compound mean and what are some of the sources through which the lead compounds have been discovered in pharmaceutical drug design and development? Provide relevant examples for each source.

PJ

Pavan J.

Chemistry 102

1 day, 8 hours ago

Ciprofloxacin is an antibiotic used for the treatment of a number of bacterial infections. Depending on the pH, this molecule could assume different forms. Provide the structure of this compound that would predominate in the stomach (low pH), blood (pH 7.0), as well as in the intestines (high pH).

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