NVC - GENERAL CHEMISTRY I – CHEM 1311 - CASANOVA
Assignment 2 (Casanova): Chemical Quantities and Equations
ALL WRITTEN WORDS SHOULD BE CLEARLY WRITTEN! NAME: __________________________________________________________ M/W OR T/R 1. Define the following terms:
a) Mole – b) Avogadro’s Number – c) Molar Mass – d) Representative particles – e) Empirical formula – f) Molecular formula – g) Chemical Equation – h) Reactant – i) Product – j) Coefficient – k) Excess – l) Limiting reactant – TIME: _____________ m) Molarity – Setup of each problem must be shown when performing ANY CALCULATION from this point on. Attention
should be given to significant figures. 2. Determine the molar masses for the following compounds. Sildenafil citrate, sold as Viagra, Revatio and under various other trade names, is
a drug used to treat erectile dysfunction and pulmonary arterial hypertension
C22H30N6O4S
(PAH). a)
C22H30N6O4S b) Mg(OH)2 Magnesium hydroxide sold under the trade name Milk of Magnesia. Cholesterol is a waxy steroid metabolite found in the cell
membranes and transported in the blood plasma of all animals. c)
C27H46O 3. Perform the following calculations.
a) How many moles of cholesterol are represented by 2.05 x 107 molecules of cholesterol? b) How many grams of cholesterol are found in 1.25 x 1023 molecules of cholesterol? c) How many carbon atoms are contained in 1.25 moles of cholesterol? d) How many hydroxide ions are found in 255 g of Milk of Magnesia? e) How many moles of oxygen atoms are contained in 25.0 mg of Viagra? 4. Perform the following.
a) Solid calcium phosphate reacts with aqueous sulfuric acid solution to give calcium sulfate, which comes out
of solution as a solid. The other product is phosphoric acid, which remains in solution. Write a balanced
equation for the reaction using complete formulas for the compounds with phase labels. b) ____Sn(s) + ____NaOH(aq) ____Na2SnO2(s) + ____H2(g) (Provide the appropriate coefficients) c) Solid ammonium dichromate is heated and allowed to decompose into nitrogen gas, water vapor and
chromium(III) oxide solid. Write a balanced equation for the reaction using complete formulas for the
compounds with phase labels d) Δ
____KClO3 (s) + ____ C12 H 22O11 (s) ____ KCl(s) + ____ H 2O(g) +____CO2 (g) (Provide the appropriate coefficients) e) ____Al2O3(s) + ____HNO3(aq) ____Al(NO3)3(aq) + ____H2O(l)
(Provide the appropriate coefficients) f) ____CaCO3(s) + ____HCl(aq) ____CaCl2(aq) + ____H2O(l) + ____CO2(g)
(Provide the appropriate coefficients) 5. If magnesium hydroxide, Mg(OH)2, is strongly heated it soon decomposes into magnesium oxide and water
vapor. Mg (OH )2 ( s ) MgO ( s ) H 2O ( g ) Determine the theoretical yield of magnesium oxide, if 10.0g of magnesium hydroxide is decomposed. 6. Nitrobenzene, C6H5NO2, an important raw material for the dye industry, is prepared from benzene, C6H6, and
nitric acid. C6 H 6 (l ) HNO3 (l ) C6 H 5 NO2 (l ) H 2O (l )
A) When 22.4g of benzene and an excess of HNO3 are used, what is the theoretical yield of nitrobenzene?
B) If 31.6g of nitrobenzene is recovered, what is the percentage yield? 7. 90.0 g of FeCl3 reacts with 52.0 g of H2S according to the chemical equation given. 2 FeCl3 ( s) 3H 2 S (aq) Fe2 S3 ( s ) 6 HCl ( g )
A) What is the limiting reactant?
B) What is the mass of HCl produced?
C) What mass of excess reactant remains after the reaction?
NOTE: The limiting reactant is the reactant that limits the amount of product that can be formed and is
completely consumed during the reaction. The excess reactant is the reactant that is left over once the
reaction has stopped due to the limiting reactant. 8. Ritonavir, with trade name Norvir (Abbott Laboratories), is an antiretroviral drug from the protease inhibitor
class used to treat HIV infection and AIDS. Its structure is composed of 61.637% C,
6.724% H, 11.660% N, 11.097% O and the remainder is sulfur (S). Determine the
empirical formula for NorvirTM and its molecular formula given that its molar mass is
720.946 g/mol. 9. Coniine, a toxic substance isolated from poison hemlock, contains only
carbon, hydrogen, and nitrogen. A famous hemlock poisoning occurred in 399
B.C.E. when the philosopher Socrates drank a liquid infused with hemlock to
carry out his death sentence; Socrates had been convicted of impiety toward
the gods and corruption of the youth. In fact, hemlock juice was often used to
execute criminals in ancient Greece. Combustion analysis of a 5.024mg
sample yields 13.90mg of CO2 and 6.048 mg of H2O. What is the empirical
formula of coniine? 10. The sterile saline solution used to rinse contact lenses can be made by dissolving 400mg of NaCl in sterile
water and diluting to 100ml. What is the molarity of the solution? 11. The odor of skunks is caused by chemical compounds called thiols. These compounds, of which
butanethiol (C4H10S) is a representative example, can be deodorized by the reaction with household bleach
(NaOCl) according to the following reaction: 2 C4 H10 S NaOCl (aq) C8 H 18 S 2 NaCl (aq ) H 2O (l )
How many grams of butanethiol can be deodorized by reaction with 5.00ml of 0.0985 M NaOCl?

• 1493262398-Assignment 2 Chemistry.docx

SuperTutor

(15)

Status NEW Posted 27 Apr 2017 03:04 AM My Price 15.00

-----------

Attachments

file 1493262412-Solutions file.docx preview (56 words )

S-----------olu-----------tio-----------ns -----------fil-----------e -----------Hel-----------lo -----------Sir-----------/Ma-----------dam----------- T-----------han-----------k y-----------ou -----------for----------- yo-----------ur -----------int-----------ere-----------st -----------and----------- bu-----------yin-----------g m-----------y p-----------ost-----------ed -----------sol-----------uti-----------on.----------- Pl-----------eas-----------e p-----------ing----------- me----------- on----------- ch-----------at -----------I a-----------m o-----------nli-----------ne -----------or -----------inb-----------ox -----------me -----------a m-----------ess-----------age----------- I -----------wil-----------l b-----------e q-----------uic-----------kly----------- on-----------lin-----------e a-----------nd -----------giv-----------e y-----------ou -----------exa-----------ct -----------fil-----------e a-----------nd -----------the----------- sa-----------me -----------fil-----------e i-----------s a-----------lso----------- se-----------nt -----------to -----------you-----------r e-----------mai-----------l t-----------hat----------- is----------- re-----------gis-----------ter-----------ed -----------onÂ----------- th-----------is -----------web-----------sit-----------e. ----------- H-----------YPE-----------RLI-----------NK -----------&qu-----------ot;-----------htt-----------p:/-----------/wo-----------rkb-----------ank-----------247-----------.co-----------m/&-----------quo-----------t; -----------\t -----------&qu-----------ot;-----------_bl-----------ank-----------&qu-----------ot;----------- -----------Tha-----------nk -----------you----------- -----------

Not Rated(0)

• Buy Answer