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Vanida
Calculate the pH of the following solutions.?
(a) 0.197 M in sodium formate (NaCHO2) and 0.280 M in formic acid (HCHO2)
(b) 0.235 M in pyridine (C5H5N) and 0.490 M in pyridinium chloride (C5H5NHCl)
1 AnswerChemistry1 decade agoHow do you change -16x^2+9y^2+80x-64 into the standard equation form for a hyperbola?
The standard form for a hyperbola is
((x-h)/a)^2-((y-k)/b)^2=1
1 AnswerMathematics1 decade agoHow do you convert mmHG to atm?
atm stands for atmospheres.
For example, if you wanted to convert 750 mmHG to atm, what would you do?
2 AnswersChemistry1 decade agoHow do you calculate the molar enthalpy of combustion of propane and propane gas?
Compound DH°f (kilocalories/mole) ------S° (calories/mole K)
H2O (l) -68.3 ------ 16.7
CO2 (g) -94.1 ------ 51.1
O2 (g) 0.0 ------ 49.0
C3H8 (g) ? ------ 64.5
When 1.000 gram of propane gas, C3H8, is burned at 25 °C and 1.00 atmosphere, H2O(l) and CO2(g) are formed with the evolution of 12.03 kilocalories.
(a) Write a balanced equation for the combustion reaction.
(b) Calculate the molar enthalpy of combustion, DH°comb , of propane.
(c) Calculate the standard molar enthalpy of formation, DH°f , of propane gas.
(d) Calculate the entropy change, DS°comb , for the combustion reaction and account of the sign of DS°comb.
2 AnswersChemistry1 decade agoWhat is the empirical formula for hydrazine and glucose?
Hydrazine's molecular formula is N2H4 (molar mass 32.052)
Glucose's molecular formula is C6H12O6 (molar mass 180.156)
1 AnswerChemistry1 decade agoGive the name and formula for the acid derived from the anion HS-?
2 AnswersChemistry1 decade agoHow do you solve a system with one equation in the system containing logs?
The two equations in the system are
log x-log y=1 and
x+2y=20
How would you find the answer?
4 AnswersMathematics1 decade agoHow do you solve the equation logx={1/3[2log8-6log3]-2log2}+log3?
2 AnswersMathematics1 decade agoHow do you solve 17^(2x-3)=25^(x-1) for x?
4 AnswersMathematics1 decade agoIf a diagonal splits a parallelogram, are the values of those 2 angles split in half equally?
Let's say you have a parallelogram ABCD. A diagonal goes from A to C. If the degrees of both angles A and C are 100, are their new degrees 50?
3 AnswersMathematics1 decade agoWhat is the charge for Carbon and Nitrogen?
I have it written that carbon is +/- 4,2 and nitrogen is +/- 3,5.
Does that mean that carbon is +/- 4 AND +/- 2? or is one number positively charged and the other isn't?
3 AnswersChemistry1 decade agoWhat is the domain of x raised to the 4/5 power?
The actual question has the 5 in the index of the radical symbol and x to the 4th power as the radicand if that helps.
2 AnswersMathematics1 decade ago