Homework Help

What is the final pH of a solution obtained by mixing 200 ml of 0.400 M NH3 with 300 ml of 0.100 M HCl? (Kb = 1.8 x 10^-5) I used an ICE table and came up with 9.68. Is that correct? Should I have used two ICE tables instead of one? The first in the one direction and the second going back in the other direction?

In a simple harmonic motion, the tension is greater than the component of weight along the rope by mv^2/r right?

Hello, I am doing an experiment/essay on acid rain... and I need to formulate a reasearch question. so,, I was wondering . Are nitric, sulfuric, and carbonic acid components of acid rain. ? If so, why would there be three different types of acid rain and what would be the extent of their respective damage to a plant's growth ?

I was wondering if anyone knows how to calculate joels. and kinetic energy and stuff. I really need help. can any 1 teach me how to do it?

This appears to be the most relevant forum so here I go... I have to do an Essay on Macbeth, which I'm struggling a lot with. Since this is a place of literature I feel that someone would be able to help me out, which I am in dire need of. The essay has to anwser the following: equivocation and explain gow it leads to Macbeth's downfall. Now, if anyone could confirm these following quotes as being relevant and thoughtful, please do so: - "This supernatural soliciting Cannot be ill, cannot be good. If ill, Why hath it given me earnest of success… If good, why do I yield to that suggestion" - "And oftentimes, to win us to our harm, The instruments of darkness tell us trut…

I am doing max/min problems in calculus. The problem is to maximize the volume of a rectangular box with edges parallel to the axes that can be inscribed in the ellipsoid x^2/4 + y^2 + z^2/9 = 1

Can anybody please tell me what are exactly are they? It's about the enlish course I have....I have to finish reading the book and I have to write out these notes.....thanks.

help.... thx

hello could you tell me if 3x^2-5y^2+4x+y-10=0 is this equation describing an hyperbola? and what about Y^2 = -6x^2+36 is this an ellipse? thank you.

[math]x=81-t^2[/math] [math]y=t^3-16t[/math] After asking about tangent lines, the question asks "The curve makes a loop which lies along the x-axis. What is the total area inside the loop?" I thought I was supposed to combine these equations so that there were no t's and then integrate it. I found that [math]y=(81-x)^{3/2}-16\sqrt{81-x}[/math] And, after looking at the curve, it looks like the answer for the Area should be [math]\int_{65}^{81} [(81-x)^{3/2}-16\sqrt{81-x}] \,dx=-4096/15[/math] I've tried this answer both negative and positive and it's been wrong. Maybe I haven't found the equation of the curve correctly or integrated correctly. Does anyone see my…

Hey I just got back from a vaction to Las Vegas , Nevada. While I was there I noticed that the sun whent down a whole lot faster than where I live now, Atlanta, GA. So I whent to this website to see what the exact times were for sunrise and sunset, and well they were about an hour apart. http://aa.usno.navy.mil/ . If someone could explain this to me I would be very much thankful.

Hey i have a home work i got to define and explain what is a richter scale and a mercalli scale and i got tell for both the advantage and disadvantage of both Please help Thaks

Would TinIV Acetate + Barium ------> be a synthesis reaction, im pretty sure it is, but i cant predict the product of this reaction And....... Octane (C3H13) + Oxygen-------->. What kind of reaction would this be, i have no clue even to where to start as far as predicting the products

Ok Im having trouble on a calculus problem. How would I do this: The number of gallons of water in a tank t minutes after the tank has started to drain is Q(t)=200(30-t)^2. How fast is the water running out at the end of ten minutes?

Describe the genotypic and phenotypic ratios for each of the following (assume the parental generations are true breeding when not stated otherwise): a)The F2 of monohybrid cross with full dominance b)The F2 of monohybrid cross with incomplete dominance c)The F2 of a monohybrid cross with codominance. d)The F2 of a dihybrid cross with full dominance at each genetic locus and no interactions between alleles at the two loci. (independent assortment) e)The F2 of a dihybrid cross with incomplete dominance at both loci and no interactions between alleles at the two loci. (independent assortment) f)The F2 of a dihybrid cross with codominance at both loci and no intera…

I was told to do an expriment which compares the carbonation levels of different soft drinks. How would I do this expriment. How do I find the carbonation level of a soft drink. Can you plz help me!!!! I need help bad. so can you help me.

So, my math professor assigned homework over the break on material he didn't cover in class and that is not in our text book. Any help would be appreciated... Ok, we're supposed to use basic trig identities to get the integral down to something manageable where we can use u-substitution and/or integration by parts. I've worked out one but I'm having trouble on the other two... 1. the integral of (cos(x))^4 dx. [Hint: also (cos(x)^2)^2] 2. the integral of sec(v) dv. [Hint: multiply sec(v) by (sec(v)+tan(v))/(sec(v)+tan(v)).] Some identities to use: sin(2x)=2sin(x)cos(x) cos(2x)=(cos(x))^2-(sin(x))^2 cos(2x)=2(cos(x))^2-1 cos(2x)=1-2(sin(x))^…

In biology class we just finished the classical genetics unit. I ot this question wrong on the test, Cross a Homozygous Black (BB), Homozygous Running (RR) mouse with a brown (bb) walzting mouse (rr). My answer looked like this RB RB RB RB rb RrBb RrBb RrBb RrBb rb RrBb RrBb RrBb RrBb rb RrBb RrBb RrBb RrBb rb RrBb RrBb RrBb RrBb It was marked wrong because I can't but the same thing on the top row. (RB) But wouldn't it make sense that since one parent is Homozygous dominan…

Consider a man riding a bicycle on a horizontal road around a circle. The situation is as simple as one imagine. If we need to find the angle which the inclined bicycle makes with the horizontal ground, we consider the torque. But why can't we take the point of contact of the bicycle and the ground into account? Error yields showing that there's always a net torque by the weight to rotate the bicycle. Anyone helps? please

hello i need help on my homework please could someone help me??? what is the difference between a chemical element and a compound

hello im new amd i need help on my homework? can anybody answer this.... whats the difference between a chemical element and a compound element?

How do you calculate your grades correctly, I'm in high school, I have about a few days before reports cards come in and I think my teachers have cheated me out of my grades. Can you guys give me an example be cause I know they put them into categories.

I'm taking a Calculus I/II lab, and we're using classic Maple. Well, here's the story: A week ago I was about to turn in my second homework assignment when I tried to pull up the Maple sheet I had saved on the schools network and received the message "There were problems during the loading process. Your worksheet may be incomplete." With that, over half of my homework was gone. My professor made me rework some of the problems and suggested I save my next assignment to a flash drive as a back-up. This week, I saved my homework to my flash drive. Everything was working fine all day until 30 minutes ago I try to load my worksheet, and again, over half of my work is gone. I t…

I have a trig project due on Tuesday and I have no idea how to solve it. (I have an idea but want to make sure I'm right) The problem goes as follows: An artist is creating triangular ceramic tiles for a triangular patio. The patio will be an equilateral triangle with base 18ft and height 15.6 ft. a. Find the area b. The artist uses tiles that are isosceles triangles with base 6 in. The function y=3 tan O (O means Theta...) models the height of the tiles, where O is the measure of one of the base angles. Graph the function. Find the height of the tile when O=30degrees and when O=60degrees c. Find the area of one tile in square inches when O=30 degrees and 60 degree…

god i feel dirty for doing this but i have a total mental block on two problems so i just need a point in the right direction. number 1 is: Find a solution of the differential equation Dy/Dx=(2x^2+y^2)/(2xy) (x>0 , y>0) which satisfies y=1 and x=1 and number 2 is: (1+x)Dy/Dx + 4y = 1/(x+1) (x (cannot equal sign) -1)