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What m/z value would you predict for the most stable fragment peak in the mass spectrum of 4-ethylheptane ? a- 85 b-128 c-99 d-113 e- 127
Lactase, an enzyme found in the small intestine, cleaves the milk sugar lactose to yield glucose and galactose. Assuming that the km for lactose is 0.9mM, vmax is 3.5 micromole/min/mg lactase, 5.7 m
How do you determine number of rings, double bonds, or triple bonds from degrees of unsaturation. For example a substance C8H8 has 5° degrees of unsaturation, so determine the number of rings an
The sample of 19.2g of KCl is dissolved into a solution with a total volume of 242.0 mL. what is the molarity of the solution
What is the stoichiometric coeffiecient for oxygen gas when the following reaction is balanced using the smallest whole number coefficients? C12H26(g) + O2(g) --> CO2(g) + H2O(g)
How many unpaired electrons would (Re(CN)6)-3 and (MnCl6)-4 have give electron configurations for each ion in terms of the t2g and eg sets.
Trans-bis(ethylenediamine)dithiocyanatocopper(II) forms three linkage isomers. write each structural formulas and name each isomer.
A sample of magnesium wieghs 26.1 mg. How many moles of magnesium are there in the sample? Calculate the mass of one mole of the ionic compound that forms from strontium an dbromine.
Consider the reaction. N2(g) + O2(g) --> 2NO(g) How many moles of NO are obtained when 0.029 mol of N2 is completely reacted
Florine is so reactive that it forms compound with material insert to other treatment when 0.448gm of plantinum is heated in florine, 0.71gm of dark red, volatile solid forms. What is emperical form
Fe2O3 + 3CO------2Fe + 3Co2 suppose that 1.14x 10^3kg of Fe is obtained from 1.82x 10^3 kg of samples Fe2O3. Assuming that the reaction goes to completion. What is % purity of Fe2O3 in orginal sampl
What mass of NH3 in gm must be used to produced 54 tons of HNO3by ostwald process assuming on 80%yield in each step. ---------gm of NH3
Draw the alkyne formed when 3,4-dichloroheptane is treated with an excess of strong base such as sodium amide
Butane gas is copresses and used as liquid fuel in dispossble cigarette lighter and light weight camping stoves. Suppose a lighter contains 2.74ml of butane. d = 0.579g/ml a, How many gm of oxygen a
when 20.6gm of methanol and 39.7gm of chlorine under go reaction that has 73.3% yield, what mass of chlormethene CH3Cl forms
Consider the following endothermic reaction at Equlibrium; 2 H20(l)<---->2H2(g)+O2(g) if .5 mol water is added what will happen and why
A sample of blood serum is teasted and found to contain testosterone at a concentration of 766 ng/mL. How many grams of testosterone are present in 30.5 mL of this blood? What is the stoichiometric
If the following substance is dissolved in pure water, will the solution be acidic and Explain Ammonium sulfate-((NH4)2SO4)
Which of the following statements is/are correct. a) Water is an example of non-polar solvent. b) Any solution always conatins an electrolyte c) NONE d) A solute is always molecules dissolved in wat
Cinsider the reaction 2KCl3(s) --> @Kcl(s) + 3O2(g) How many grams of oxygen are produced from the complete reaction of 23.8g of KCL3? How many molecules are present in 1.80g of C6H8O6
Draw balanced chemical equations for these two potential side reactions: 2. Explain in detail how phosphoric acid catalyzes the acetylation of salicylic acid
Balance and complete these reactions. Also write reaction type (combination, decomposition, single replacement, double replacement) a. Cu+ HNO3 ---> b.Cu(NO3)2 + NaOH ---> c. Cu(OH)2 (heat)---
In the coordination compound K2[Co(en)Cl4] the coordination number (C.N.) and oxidation number (O.N.) of Cobalt are C.N. = 6; O.N. = +2. C.N. = 6; O.N. = +3. C.N. = 5; O.N. = +2. C.N. = 5; O.N. = +4
The reaction of methane and water is a way to prepare hydrogen according to CH4(g)+H2O=CO2(g)+H2(g) a) If 995 g of CH4 reacts with 2510 g of water, how many moles of reactants and products are there