Monday
July 28, 2014

Posts by bob


Total # Posts: 2,412

Chemistry
What is the theoretical yield of calcium carbonate if 2.97 grams of calcium chloride dihydrate reacts with excess sodium carbonate according to the balanced chemical reaction shown below? CaCl2•2H20(aq)+Na2CO3(aq)->CaCO3(aq)+2NaCL(aq)+2H20(I) Please use molar mass valu...

Chemistry
I apologize about the length of the message. This will be the last long one I post. To figure out the molar mass of CaCl2•H2O (rounding to the hundredths place), I did Ca = 40.08 Cl2 = (35.45) x 2 = 70.9 2H2O = (18.02) x 2 = 36.04 40.08 + 70.90 + 36.04 = 147.02 g/mol 2.97...

Chemistry
Hi, I have a few questions that I am struggling with. Any help would be greatly appreciated. Question 1 Calculate the molar mass of calcium chloride dihydrate, CaCl2 • 2H2O. Please use the Periodic Table values rounded to the hundredths place for your calculation and roun...

SAT Essay
off topic. its not about failure its about expectations

math
First rearrange the equation into Y=mx+b form. where m represents the slope & y represents the Y intercept. The X & Y represent the two coordinates that you are solving for. When you rearrange it into y=mx+b form then the equation should read y=3x-5. 3 is your slope and -5 is ...

Math
francois is stokcing a new fish pond on his farm. The pond is filling slowly and the volume of water in it can support a certain number of fish,(variable-F). F=42m+250, where m is the number of months the pond has been filling. the pond was stocked initially with 110 fish, a p...

math
u first have to rearrange this equation so it is in y=mx+b form after u do that u first graph the y-intercept then depending on ur slope u grpah it if u slope is 2 that basically means 2 over 1. the rise is 2 and run 1. so u go up 2 from ur y-intercept and 1 right and u contin...

physics
a 1600-kg vehicle moves with a velocity of 19.5 m/s. calculate the power required to reduce the velocity to 3.20 m/s in 11.0 s

Microeconomics
1. A country's consumption possibilities frontier can be outside its production possibilities frontier if a. the country engages in trade. b. the citizens of the country have a greater desire to consume goods and services than do the citizens of other countries. c. the cou...

Microeconomics
1. A country's consumption possibilities frontier can be outside its production possibilities frontier if a. the country engages in trade. b. the citizens of the country have a greater desire to consume goods and services than do the citizens of other countries. c. the cou...

sociology perspective
do your own homework

Physics
An engine has a hot reservoir of 520K and a low temperature reservoir of 330K. What is the theoretical efficiency of this engine? Answer in units of % I got 36.5% but the teacher is saying that's wrong!! Please help with calculation.

math
g(13)= 3(13)-2 =39-2 =37

physics
I used the theorem and got a answer of 37% but I don't think its right??

physics
An engine has a hot reservoir of 520K and a low temperature reservoir of 330K. What is the theoretical efficiency of this engine? Answer in units of %

math
1,000,000+245-4564+3984068568+45-21x75.5675x500,000 :]

calculus
Find a formula for the inverse of the function f(x) = (4 x-1)/(2x+3)

calculus
Find an equation of the tangent line to the following curve at the point (0, 4). xe^y+ye^x=4

physics
a 2390 kg car traveling to the west at 22.4 m/s slows down uniformly under a force of 8740 N to the east. (a) How much force would be required to cause the same acceleration on a car of mass 3140 kg? Answer in units N (b) How far would the car move before stopping? Answer in u...

Physics
A weight suspended from a spring is seen to bob up and down over a distance of 37 cm twice each second. What is frequency in units of Hz? What is the period in units of s.? What is the amplitude in units of cm?

U.S.History
in reference to your question about the Puritans. I believe the answer is B. The puritans came to America to set up a society without religious persecution

english
Excerpts from Walt Whitman’s Song of Myself Number 33 Space and Time! now I see it is true, what I guess'd at, What I guess'd when I loaf'd on the grass, What I guess'd while I lay alone in my bed, And again as I walk'd the beach under the paling stars...

chemistry help
how do you balance these chemical equations NH4)3PO4 + Mg (CH3COO)2 -> Mg3(PO4)2 + NH4CH3COO MoO3 + H2SO4 + Zn -> Mo2O3 + H2O + ZnSO4

chemistry need help asap
how do you balance these equations? Ag2O -> Ag + O2 C6H6 +O2 -> CO2 + H2O

algebra
5x=-2x-6

english paper
so basically i am "summarizing" all the different sources but i need to put it all at once...right?

english paper
Hello I have a quick question. I have to write an english paper on the recent issues in business. it says that "purpose in writing this report is to SYNTHESIZe current, reported information on a recent issue in bussiness" The reason why i have the work synthesize in ...

poop
i hate all of you

math
Farmer Brown had some animals. One-fourth were horses, one-half were cows, and the rest were pigs. He had 8 pigs. How many animals did he have altogether? I know you would get a common denominator for 1/4 and 1/2 which would be 4 so you would have 1/4+2/4= 3/4 and then take 4/...

algebra
Factor x^2+6x+5 and x^2+8x+15

algebra
Simplify x^2-16 and x^2-100

english
What information can you get from a poem?

algebra II
solve each equation. 5y-2(y+3)=4y

algebra II
Solve each a equation. 5x=-2x-6 -5y+7=-18

analogies
What is the analogy for South America: Brazil :: North America:

math
what is the greatest common factor of 106 and 320

chemistry
Hydrogen cyanide is produced industrially from the reaction of gaseous ammonia, oxygen, and methane. 2 NH3(g) + 3 O2(g) + 2 CH4(g) → 2 HCN(g) + 6 H2O(g) If 5.35 103 kg each of NH3, O2, and CH4 are reacted, what mass of HCN and of H2O will be produced, assuming 100% yield...

calculus
Compute the area of the region in the fi…rst quadrant bounded on the left by the curve y = sqrt(x), on the right by the curve y = 6 - x, and below by the curve y = 1.

calculus
Find the average value of the function on the given interval f(x) = 2x^3(1+x^2)^4, [0,2]

calculus
Consider the solid obtained by rotating the region bounded by the given curves about the line x = 6. y = sqrt(x), y = x Find the volume V of this solid.

calculus
Consider the solid obtained by rotating the region bounded by the given curves about the x-axis. y = 6 x^6 , y = 6 x , x >= 0 Find the volume V of this solid.

science245
In answer to your question yes these are some of the rudest people on the planet. I guess their brains are so huge with information that they do not have the capacity for compassion.

algebra
1. The time t that it takes for a salesman to drive a certain distance d varies inversely as the average speed r. It takes the salesman 4.75 h to travel between two cities at 50 mi/h. How long would the drive take at 50 mi/h?

algebra
The volume V of a gas varies inversely as the pressure P and directly as the temperature T. A certain gas has a volume of 20 L, and a temperature of 320 K, and a pressure of 1 atm. If the gas is compressed to a volume of 15 L and is heated to 330 K, what will the new pressure...

algebra
1. The time t that it takes for a salesman to drive a certain distance d varies inversely as the average speed r. It takes the salesman 4.75 h to travel between two cities at 50 mi/h. How long would the drive take at 50 mi/h?

algebra
Direct and Joint Variation 2. The volume V of a rectangular prism of a particular height varies jointly as the length l and the width w, and V = 224 ft when l = 8 ft and w = 4 ft. Find l when V = 210 ft and w = 5 ft.

math
Direct and Joint Variation 2. The volume V of a rectangular prism of a particular height varies jointly as the length l and the width w, and V = 224 ft when l = 8 ft and w = 4 ft. Find l when V = 210 ft and w = 5 ft.

U.S.History
yes that is the ansswer for sure. good job!

algebra
write in standard from: 8.36 x 10^5 and -6.43 x 10^-4

algebra II
f(x)=|x-2|-2

math
Can you tell me if this could be right? First take 10000x18=180,000 Second divide 180,000 by 12=15000 Third divide 15000by 5280= 2.84 which would round to 3 Please tell me if this could be right

math
would you not divide in the first step?

math
Suppose that humans walk about 10,000 steps perday on average. Your average step is probably about 18 inches. If so, how many inches per day do you walk? How many feet per day do you walk? How many miles per day do you walk, to the nearest whole mile?

math
(6) Which equation is equivalent to 4^-x=8? a. log8 4=x b. logx = -4 c. log -x 4=8 d. log 4 8= -x

algebra
i think it is d

algebra
Which best describes the following function? f(x)=2^3.5x-7 a. exponential b. linear c.cubic d. quadratic

math
What is $600 invested at 9% interest, compounded quarterly, worth in 3 years? a. $640.50 b. $641 c.$762 d.$784

algebra
Solve the equation 10 x = 20 for x. a. x=1/2 b.x=2 c.x=1.3 d.x=10

Math
Suppose that humans walk about 10,000 steps per day on average. Your average step is probably about 18 inches. If so, how many inches per day do you walk? How Many feet per day do you walk? How many miles per day do you walk, to the nearest whole number?

physics
How fast WAS it rolling on the table before it fell off. I don't think the height of the table (1.5m) or distance from table (.8m) are relavent to the problem. Is this a trick problem???

physics
A 72 g baseball rolls off a 1.5 m high table and strikes the floor a distance of .8 m away from table. How fast is it rolling on the table before it fell off?? Accel of gravity is 9.81 m/s2.

physics
so is it A B OR C

physics
A wheel of diameter 0.700 meters rolls without slipping. A point on the top of the wheel moves with a tangential speed of 2.00 m/s with respect to the ground. 1. If the wheel suddenly stops spinning and skis along the ground then a. v=rù b. v>rù c. v<r&ugra...

physics
Calculate the speed at the edge of a disc of radius 8.5 cm that rotates at the rate of 4 rev/s. Answer should be in units of m/s Thanks

physics
a person stands a distance of 0.300 meters from the right end of a 2.00 meter long uniform platform that is supported by two posts, one at each end. The board has a mass of 20.0 kg and the person's mass is 75.0 kg. a. determine the force exterted on the board by the post o...

physics
i am sorry but i don't get how to do it

physics
person stands a distance of 0.300 meters from the right end of a 2.00 meter long uniform platform that is supported by two posts, one at each end. The board has a mass of 20.0 kg and the person's mass is 75.0 kg. a. determine the force exterted on the board by the post on...

chemistry
Given the following reaction: 4 KO2 + 2 H2O + 4 CO2 ==> 4 KHCO3 + 3 O2 How many moles of O2 will be produced if 2.46 moles of CO2 react completely? moles

physics
a person stands a distance of 0.300 meters from the right end of a 2.00 meter long uniform platform that is supported by two posts, one at each end. The board has a mass of 20.0 kg and the person's mass is 75.0 kg. a. determine the force exterted on the board by the post o...

phil
1. the roosevelt corollary was first put into effect in a. dominican republic b. hawaii c. cuba d. puerto rico i think it is A

history
i don't get why it's not A

history
1.Which best describes the US foreign relations or policies for the entire 19th cnetury a. american foreign policy frequently became entwined in the issues raised by conflicts between european powers b. the united states maintained a small military and naval establishment beca...

physics
A quarterback throws the football to a stationary receiver who is 18.3 m down the field. Football is thrown at an angle of 44.9 degrees to the ground. Acceleration is 9.81 m/s2. What initial spped must the quarterback throw ball to reach receiver and what is the highest point ...

biology
Suppose that for an organism, 2n=8. How many chromosomes do the organism's gametes contain?

chem
I have a problem i don't get... H3PO4+3NaOH -> 3H2O+Na3PO4 How many moles of Na3PO4 will be produced from 1.7 moles of NaOH in the presence of excess H3PO4?

physics
225

physics
225

algebra II
y=mx+b (x,y) You multiply x by m, the slope. You get to y by adding b. (2,-4) You multiply 2 (x) by -1/3 (m), the slope. You get to -4 (y) by adding -3.33 (b) = -10/3 Therefore, y=(-1/3)x-(10/3) The next one is done the same way.

algebra II
Find the equation of the line With a slope of 2/3 that goes through the point (4, 5) With a slope of (-1/3) that goes through the point (2, -4) With a slope of 3 that goes through the point (-5, -1)

english
i think so what do you say

english
but do he really admire his father

english
i think dislike

english
What is the speaker's attitude towards his father? Father My father knows the proper way The nation should be run; He tells us children every day Just what should now be done. He knows the way to fix the trusts, He has a simple plan; But if the furnace needs repairs, We ha...

business
What is a microsoft surface? And how could I make it better?

computer
What is a microsoft surface? And how could I make it better?

english
Ozymandias I met a traveller from an antique land Who said: Two vast and trunkless legs of stone Stand in the desert…. Near them, on the sand, Half sunk, a shattered visage lies, whose frown, And wrinkled lip, and sneer of cold command, Tell that its sculptor well those p...

english
Ozymandias I met a traveller from an antique land Who said: Two vast and trunkless legs of stone Stand in the desert…. Near them, on the sand, Half sunk, a shattered visage lies, whose frown, And wrinkled lip, and sneer of cold command, Tell that its sculptor well those p...

Algebra
Sorry, I was thinking PERPENDICULAR to a vertical line, so the answer would NOT be 0 (a horizontal line), it would be undefined (another vertical line alongside the original vertical line).

Algebra
VERTICAL LINE: No slope (or "undefined" slope) HORIZONTAL LINE: Slope=0 (by the way, a vertical line is "undefined" because the formula used to find the slope, (y2-y1)/(x2-x1), has a denominator of 0 when the line is straight up and down, and you can NEVER ...

chemistry
Do polar and non-polar substances mix

english
 Ozymandias   I met a traveller from an antique land Who said: Two vast and trunkless legs of stone Stand in the desert…. Near them, on the sand, Half sunk, a shattered visage lies, whose frown, And wrinkled lip, and sneer of cold command, Tell that its sculptor...

english
3-- According to the poem, king Ozymandias had the following wordswritten on his statue: "Look on my works, ye Mighty, and despair!' What message was this meant to tell the people of his time long ago?

english
I met a traveller from an antique land Who said: Two vast and trunkless legs of stone Stand in the desert…. Near them, on the sand, Half sunk, a shattered visage lies, whose frown, And wrinkled lip, and sneer of cold command, Tell that its sculptor well those passions rea...

social studies
what happened to buddhism in india

social studies
How did Buddha try to change the lives of people in India?

chemistry
Do polar and nonpolar substances mix?

Chemistry
Do I have to add c and h number together?

Chemistry
Calculate the electronegativity differences between the following atoms: 1.C-H 2.O-H 3.C-O

music
In which city did jazz take hold? Why?

music
What were the beginnings of music in America that developed into jazz?

Pages: <<Prev | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | Next>>

Search
Members