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Please help me answer these questions! Thank you inadvance!!1. When a 9.00 g sample of metal is heated to 100.0 C, anddropped into 20.0 mLs of water at 25.00 C, the final temperature is28.29 C.
a. Calculate the specific heat of the metal, assuming perfectinsulation and a calorimeter heat capacity of zero.
b. Estimate the atomic weight of the element and guess itsidentity
2. 30.0 g of iron filings at a temperature of 80.0 C are mixedwith 40.0 g of water at a temperature of 22.0 C in a styrofoam cup.The resulting temperature of the mixture is 26.28 C. Calculate the specific heat of the iron.
3. If we had not drawn te temperature graph to help determineout "real" highest temperature, would out specific heat have beenhigher or lower? Explain in few words.
The mixture is ignited with a spark and it reacts to form H2O (l)liquid water. determine the temperature of water?
a 1- l flask is filled with 1.40 g of argon at 25?. a sample of ethane vapor is added to the same flask until the total
Given the parent compound, draw the mass spectrum fragment that is observed at m/z 91. Include any hydrogen atoms and the charge.
At 25 degrees C, the standard enthalpy of formation of KCl(s) is -435.87 kJ/mol. When one moles of KCl(s) is formed by reacting potassium vapor and chlorine gas at 25 degrees C, the standard enthalpy of reaction is -525.86 kJ/mol.
Calculate the OH- concentration of a solution that has [H3O+] of 3.5 x 10 -10M. Is the solution acidic, base, or neutral? report answer in two decimal places.
What is the molarity of ZnCl2 that forms when 30.0 grams of zinc completely reacts with CuCl according to the following reaction? Assume a final volume of 275.
The following reaction is first order with respect to NO and first order with respect to O2, and the rate constant is 5.0 x 104 M-1s-1: 2NO(g) + O2(g) --> N2O4(g) a) Write the rate law for this reaction
the Ras and MAP kinase pathway starts with the binding of a growth factor to a receptor. as a result, all of the following occur EXCEPT
Could you tell me what is the purpose of this reaction (Michael and aldol condensation reactions), and the stepwise mechanism of the reaction.
A metal sulfide, M2(CO3)3, has a Ksp of 3.30x10^-42. What is the molar solubility of this sulfide in water. Assume the sulfide behaves ideally (ignore hydrolysis effects).
1401g sample of a purified carbonate was dissolved in 50ml of a .1140 M HCl and boiled to eliminate CO2. Back titration of the excess HCl required 24.21ml of .09802M NaOH. Identify the carbonate.
Investigators have reported experimental observation of the He2 ‘complex' (i.e., a very weakly bonded molecule). The fact that the observation required temperatures in the neighborhood of 1 mK is consistant with computational studies that hcDe for..
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