Questions and answers by

Feather

Questions (47)

Brian was training to run a marathon. During the three day period before the race he decided he would train for 11 hours. If he
1. 2 answers
2. 3,102 views
DiffereniateV^3-2v√v/v I used the quotient rule (v)(v^3-2v√v)' -(v^3-2v√v)(v)' /(v) The answer is 2v-1-1 I got this far
1. 2 answers
2. 513 views
DiffereniateV^3-2v√v I used the quotient rule (v)(v^3-2v√v)' -(v^3-2v√v)(v) /(v)' The answer is 2v-1-1 I got this far but
1. 3 answers
2. 620 views
G(X) = x^2(1-2x)I have to differentiate this function I used the power and product rule G'(X)= (x^2)'(1-2x)+(x^2)(1-2x)' I got
1. 1 answer
2. 438 views
Limh-----> 0. (X+h)^3-x^3/h So I foiled out the numerator And I got X^3 +x^2h +2x^2h +2xh^2+h^2+h^3-x^3 So I canceled out x^3
1. 1 answer
2. 521 views
it is written as 1 in the numerator then in the denominator it is written as t√1+t this is then subtracted by 1/t lim is
1. 1 answer
2. 362 views
√1+t-√1-t/t lim-----> 0 The answer is one and I am not getting it I factored it like this √1+t-√1-t/t x √1+t-√1-t
1. 2 answers
2. 451 views
(1/t√1+t - 1 /t) limt➡️0 So far I factored out 1/t√1+t - 1/t x √1+t/√1+t I am having trouble going further
1. 5 answers
2. 407 views
LimX➡️-2. X+2/x^3+8 How do I factor out the bottom? The answer is 1/12 Would it be like this x+2/(x+2)(x-2)(x+2)??
1. 1 answer
2. 331 views
Evaluate the limit(6+h)^3-216/h I think you would have expand the numerator (6+h)^3 = but how would you do it? 216+108h+h^3?
1. 1 answer
2. 815 views
X^2 +6x+9/x^4-81I put the answer as 1/36 it's not the answer?? It told me to use the identity x^4-a^4=(x+a)(x-a)(x^2+a^2) I used
1. 1 answer
2. 374 views
The equation is x^2+6x+9/x^4-81Limit is x➡️-3 I factored it out and I got 1/36 would that be right The numerator would
1. 2 answers
2. 574 views
The point (1,0) lies on the curve y=sin(10π/x).A) if Q is the point (x,sin(10π/x), find the slope of the secant line PQ.
1. 6 answers
2. 3,937 views
Use bionomial formula to find the coefficient of the t^2 m^8 term in the expansion of (3t+m)^10.I got so far this 10C8 x 3^2 x
1. 7 answers
2. 828 views
Graph g(x)= 2x+8 if x<-2. 5-2x if -2 is less than or greater than x < 3 -2 if x is greater than or less than 3 I have to graph
1. 2 answers
2. 354 views
The heat of vaporization of ammonia is 23.4 kj/moles. How much heat is required to vaporize 1.00kg of ammonia? How many grams of
1. 1 answer
2. 2,481 views
Determining oxidation numbers for remaining atoms in HIO3, H3PO4, Ba(OH)2, and BaPO4I have no idea if I am doing this right I
1. 1 answer
2. 593 views
What are the relative masses of protons neutrons and electrons?
1. 1 answer
2. 492 views
O=S=O what is this molecular structure Sulfur dioxide? It wants it's binary compound name and formula it is written this way
1. 1 answer
2. 466 views
Define isoelectronic series. Put the K+, Ca2+, Cl-, and Ar ions and atoms in order of increasing size and explain the trends.Cou
1. 1 answer
2. 3,333 views
Formal charges on CH2O and H2SO3I was taught thus way valence electrons subtracted from addition of dots plus bonds For CH2O
1. 1 answer
2. 3,357 views
Define electron affinity, and explain why Na has a less exothermic value than Cl in terms of ion stability (Na-1)I know the
1. 0 answers
2. 418 views
Define IE, and explain why Na has a smaller value than Cl in terms of ion stability (Na+1 versus Cl+1).Would it be Na? But I
1. 0 answers
2. 424 views
For two spin-paired electrons that are in the same orbital, describe how the values for the first three quantum numbers (n, L,
1. 1 answer
2. 624 views
Determine all possible values of each quantum number (n, l, ml, and ms) for electrons in both the 2s and 2p subshells.for 2s the
1. 1 answer
2. 626 views
Determine the total possible number of orbitals and electrons for both 2s and 2p.What is the maximum number of electrons per
1. 1 answer
2. 543 views
An e−1 is released by an electron microscope at 3.00 × 106 m/s.Determine  in meters using the de Broglie relation
1. 1 answer
2. 588 views
I am still having problems this question2. Review Examples 7.3 and 7.4, as well as the equation for E in the chapter notes.
1. 1 answer
2. 514 views
Suppose an e- in an H atom has a transition from n = 3 to n = 2.a. Determine the energy of the released photon. i set it up like
1. 1 answer
2. 574 views
For a photon with  = 730 nm, determine its speed, frequency, energy, and color.For frequency the formula would be v=c/lambda
1. 1 answer
2. 1,177 views
Suppose that the 10.0 g of NH3 is formed in a bomb calorimeter, and that all of the evolvedheat for the exothermic reaction is
1. 1 answer
2. 801 views
Determine the heat evolved (in kJ and in J) when 10.0 g of NH3(g) are created.Show all units and conversion factors. 10.0 gNH3
1. 1 answer
2. 705 views
1N2(g) reacts with H2(g) to form NH3(g), gaseous ammonia.Show balanced thermochemical equations based on both one mole and two
1. 1 answer
2. 810 views
CaCO3 + 2H3O= Ca + 3H2O + CO2How many moles of CaCO3 produced the moles of CO2 in the reaction?
1. 1 answer
2. 1,101 views
In some solid calcium carbonate samples, calcium bicarbonate Ca(HCO3)2. Write a balanced equation for its reaction with
1. 1 answer
2. 1,136 views
Review example 5.10 and exercise 5.10. Suppose 1.58 moles of N2 and 0.420 moles of O2 occupy 22.41 L at a total pressure of 2.00
1. 1 answer
2. 588 views
Find the constants (a and b) for O2 in Table 5.7. Use the Van der Waals equation to determine the pressure of 1.000 mole of O2
1. 1 answer
2. 585 views
3Review example 5.7 and exercise 5.7. Suppose there are 2.00 moles of O2 at 1520 mmHg and 27.0 oC. Rearrange the ideal gas law
1. 1 answer
2. 764 views
Convert the final pressure for problem #1 into mmHg, Pa (kg/m∙s2), and kPa.Also, use 1 atm = 14.696 psi to convert to psi
1. 1 answer
2. 1,022 views
Use half-cells to balance the following redox reaction, and label the oxidation and reduction half-reactions.Also, note that
1. 3 answers
2. 765 views
Then, determine the final volume needed to dilute 20.0 ml of 1.00 M NaOH to 0.25 M. Next, find the volume of water which needs
1. 1 answer
2. 443 views
Then, determine the final volume needed to dilute 20.0 ml of 1.00 M NaOH to 0.25 M. Next, find the volume of water which needs
1. 4 answers
2. 590 views
Use half-cells to balance the following redox reaction, and label the oxidation and reduction half-reactions.Also, note that
1. 2 answers
2. 1,158 views
Use solubility rules to write the balanced molecular, complete ionic, and net ionic equations for the aqueous reaction between
1. 1 answer
2. 1,299 views
If 64.0 g of H2O are actually obtained, find the actual yield %.Show that the % the same whether you calculate using grams or
1. 1 answer
2. 737 views
4. Suppose there are 72.0 g of O2 available, along with the 8.08 grams of H2.Use ratios of stoichiometric coefficients to find
1. 3 answers
2. 928 views
For the reaction 2H2 + 1O2 à 2H2O, there are 8.08 grams of H2 available.2. Use the ratio of stoichiometric coefficients in the
1. 1 answer
2. 1,090 views