# Posts by John

Total # Posts: 8,394

**Chemistry**

90/180.1559 =0.4995 0.4995*22.4 A. =11.2 Is this correct

**Chemistry test can't fail please help (senior)**

1.Cell respiration glucose is reacted wth oxygen in body to produce carbon dioxide and water how many liters of carbon dioxide would be produced if 90.0 g of glucose completely reacts with oxygen C6H12O6(s)+ 6O2(g) -> 6H2O(g) + 6CO2 (g) How many liters of carbon dioxide ...

**Chemistry**

1.Cell respiration glucose is reacted wth oxygen in body to produce carbon dioxide and water how many liters of carbon dioxide would be produced if 90.0 g of glucose completely reacts with oxygen C6H12O6(s)+ 6O2(g) -> 6H2O(g) + 6CO2 (g) How many liters of carbon dioxide ...

**Chemistry**

I don't know what to do once I get the .49999 number

**Chemistry**

Cell respiration glucose is reacted wth oxygen in body to produce carbon dioxide and water how many liters of carbon dioxide would be produced if 90.0 g of glucose completely reacts with oxygen C6H12O6(s)+ 6O2(g) -> 6H2O(g) + 6CO2 (g) How many liters of carbon dioxide would...

**Chemistry test help please**

How many liters of chlorine as can be produced when 1.96 L of HCl react with excess O2 at STP Show Work A.0.49L B.0.98L C.1.96L D.3.92L

**Chemistry**

Cell respiration glucose is reacted wth oxygen in body to produce carbon dioxide and water how many liters of carbon dioxide would be produced if 90.0 g of glucose completely reacts with oxygen C6H12O6(s)+ 6O2(g) -> 6H2O(g) + 6CO2 (g) How many liters of carbon dioxide would...

**Chemistry**

Cell respiration glucose is reacted wth oxygen in body to produce carbon dioxide and water how many liters of carbon dioxide would be produced if 90.0 g of glucose completely reacts with oxygen

**biology**

1.1 The gametophyte generation in a fern plant changes to the sporophyte generation by A.fertilisation B.melosis C.asexual reproduction D.fusion of spores the answer is A.fertilisation right? 1.2 the male cone differs from the female cone in the pine in that A.only the male ...

**College Physics**

This figure shows an overhead view of the path of a 0.187 kg ball as it bounces from a rail of a pool table. The ball’s initial speed is 2.19 m/s. The angle θ1 shown on the sketch is 30.0o. The bounce exactly reverses the y component of the ball’s velocity but ...

**Chemistry**

What volume (in mL) of 0.55 M Na2SO4 solution is needed to precipitate all the barium, as BaSO4(s), from 15.5 mL of 0.25 M Ba(NO3)2 solution?

**math**

find the length of an arc of a circle of radius 5.6 cm which subtends an angle of 60 degrees at the centre of the circle.(take pie as 22 divided by 7.)

**math**

i cant figure it out

**math**

How do i find the 12th term of the sequence 36,18,9.... using a formula

**math**

find the number of terms for the following sequence. 125,109,93,.......-115 i got the answer of 15 terms. How do i get it though using a formula?

**math**

find the missing terms for the following sequence geometric sequence 96,__,__,__,6

**math**

should it be a fraction?

**math**

find the 12th term of the sequence 36,18,9....

**chemistry**

How much heat is produced by the complete reaction of 5.91kg of nitromethane?

**english**

15. Identify the sentence in which the underlined pronoun is used incorrectly. There are only six days left in the school year. It will be fun to visit their house in the summer. Their just going to have to wait to see the movie. Greg refused to go there because of the bad ...

**math**

1 week used 3/4 12 weeks ____ ? 12 x 3/4 so the answer is A

**Calculus**

The sun is setting at the rate of 1/4 deg/min, and appears to be dropping perpendicular to the horizon, as depicted in figure 6.2.5. How fast is the shadow of a 25 meter wall lengthening at the moment when the shadow is 50 meters long?

**math**

Five friends picked 7 pounds of apples. They will share the apples equally. How much will each get?

**Physics**

plastics are insulators

**Help please**

you caught his attention because you didn't follow instructions, not because it was someone to help. No wonder you are asking others to do homework for you

**english**

this is simple, in the sentence it says "Her screaming" so the answer is d because it was her screaming

**english**

Around corner exam are.

**chemistry**

17. Calculate H for the following reaction using Hess law H2 (g) + Br2 (g) → 2 HBr (g) Experimental information 2 H+ → H2 H -436.4 kJ 2 Br- → Br2 H -192.5 kJ 2 H+ + 2 Br- →2 HBr H -144.8 kJ

**self**

I have 10 letters. My 1st and 2nd letter means not. My 1st to 5th letter means below. My 6th to 10th letter is to stand. In all, I am when you know. What am I?

**calculus**

0.66905

**Math**

prime numbers could be 2, 3, 5, 7, 11, etc. What happens with 2, 3 which gives us 6? or with 5, 7 which gives us 35? Can you finish it from here?

**Math**

Change 3 3/4 to an improper fraction by multiplying 4 times 3 and adding it to the numerator 15/4 multiply by 6/1 multiply 6 times 15 and 1 times 4 Divide 90 by 4 to get your answer.

**Math**

If there are 6 numbers on the die, then you have 1/6 of getting the number 5. To get a blue it looks like you have 1/4. For both to happen together (indicated by using "and") then, multiply the two fractions to get your probability. You are correct with answer B.

**phusics**

a 50g bullet is shot from a rifle at 900m/s a) what is the KE of the bullet? b) how much work is done on the bullet if it starts from rest?

**geometry**

the tree is opposite the angle and the 50 feet is adjacent to the tree. opposite/adjacent = tangent x/50 = tan 48. Find tan 48 and multiple by 50 to find "x" which is the height of the tree.

**math**

75 pupils sat for a Science Test. The average score was 58 marks. If the average score of the girls was 62 marks and the average score of the boys was 56 marks, how many boys sat for the test?

**Chemistry**

penn sate

**Civics**

Does the prefix "bi" give you a hint?

**Math Help!!!**

It looks like we are taking 1/2 of the previous number or dividing by two. Any time you are multiplying or dividing you have a geometric sequence. If you are adding or subtracting a constant, then you have an arithmetic sequence.

**Ethics in Technology**

I think it might be C. I don't think their salaries went up.

**math**

You will have a right triangle with the 80 meters on the hypotenuse and the x on the side opposite the 75 degree angle. Using Trig: x/80 which is opposite over hypotenuse equal to sin of 75 degrees. Find the sin of 75 and multiply it by 80 to find x.

**Algebra 2**

If you take the square root of 36x^2 you will get 6x. This is fine because you only have one term. But, if you take the square root of 36 - x^2, you can't take the square root of each part when you are adding or subtracting which causes you to have more than one term. The ...

**Math**

Jane will receive 18% less of her regular pay when she retires. Her regular pay is $500 per week. a How much would she receive per week if she retires today? answer: 500/18% = 90 500-90= $410 b. Explain how you can make this same calculation using 100%-18%=82% answer: same as ...

**chemistry**

which of the following molecules will exhibit hydrogen bonding? a. CH3OCH3 b. HF c. CH4 d. LiH

**French**

Please unscramble O É N C A R C S in French. It is a verb.

**History**

Thanks Bejing!!!

**Physics**

Water flows horizontally in a tapered pipe at a rate of 500 m^3/h. The area at one section of the pipe is 6500 mm² and 4000 mm² at another section. Calculate the gauge pressure at the larger section if the pressure at the smaller section is atmospheric.

**History**

. In __________ trials, the judge is both the trier of law and the trier of fact. A) de novo B) bench C) jury D) pro se I have a feeling it could be bench

**math**

120

**math**

Mary invested $3,750 for 42 months at a simple interest rate of 3.85%. How much interest did she earn?

**math**

Evaluate using L'Hopital Rule? lim as x approaches x from left (1-x)^(3/x)

**calculus**

The graph of the function y=x^5-x^2+sinx has a point of inflection at x= a. 0.324 b. 0.499 c. 0.506 d. 0.611 e. 0.704 Thanks.

**English Literature**

I read William G Mcloughlin's essay "Pietism and the American Character" and I didn t understand anything I need a brief summary of the main ideas

**calculus**

What is the limit, as x approaches 1, of (sqrt(x) - 1)/(x - 1)? I need to show work, but I know the answer is 3/2, because I confirmed with a TI-89.

**physics**

A 450 kg car traveling north at 30 m/s collides with a 560 kg car traveling west at 35 m/s. If after the collision they become entangled and move off together, (a) what is magnitude of the final momentum of the cars? (b) What is their final speed of the cars? (c) What is their...

**spanish**

maybe c

**chemistry**

100 / 960 = 150 / x 960 x 150 = 100x ??? = 1440 mm of Hg

**Finance**

Antiques ‘R’ Us is a mature manufacturing firm. The company just paid a dividend of $11.45, but management expects to reduce the payout by 4.5 percent per year, indefinitely. Required: If you require a return of 11 percent return on this stock, what will you pay for...

**chemistry**

when 5g of impure sample of CH4 is completely combusted, 9g of H2O was produced.what is the percentage purity of the sample of CH4

**math**

For which pair of functions f(x) and g(x) below will the lim f(x)/g(x)equal 0 x-infinity f(x) e^x; g(x) = x^3 f(x) x^5; g(x) = e^x f(x) x^3; g(x) = ln(x) f(x) x^negative 2; g(x) = e^negative x

**Art**

All you a**holes need to shut up. This is a homework help site, just help the kids with their work and STFU!!!!!

**math**

The area A equals = πr^2 of a circular oil spill changes with the radius. At what rate does the area change with respect to the radius when r equals= 3ft? This is 9pie right? not 6pie?

**Math**

Let x = time (days) for all 3 then x(1/4 + 1/10 + 1/5) = 1 multiplying both sides by 20 x(5 + 2 + 4) = 20 x(11) = 20 x = 20/11 x = 1.82 days or x = 1 day, 19 hours and 38 minutes

**English**

No I think it is B

**math**

John bought a new car for shilling 800,000. After 5 years, he sold it through a second-hand car dealer. The dealer charged a commission of 4% for the sale of the car. If John received shillings 480,000, calculate the annual rate of depreciation of the car.

**math**

A retailer planned to buy some computers form a wholesaler for a total of shilling 1,800,000. Before the retailer could buy the computers the price per unit was reduced by shilling 4,000. This reduction in price enabled the retailer to buy five more computers using the same ...

**Math**

The length and breadth of a rectangular paper were measured to be the nearest centimeter and found to be 18 cm and 12 cm respectively. Find the percentage error in its perimeter.

**portland state**

46 decreased by twice matts height

**algebra**

1. How many numbers are divisible by 6? 6, 12, 18 and 24 Right? There are 4 chances of getting a number divisible by 6 and 20 chances of getting a number NOT divisible by 6. So, you will have 20/24 which reduces to ??? 2. You can use the counting principle here. For president ...

**math**

A and B farm A produces milk with 3 ½ percent fat and farm B produces milk with 4 ¾ percent fat. (a) Determine (i) The total mass fat in 50 kg milk from farm A and 30 kg of milk from farm B (ii) The percentage of fat in a mixture of 50 kg of milk from A and 30 kg...

**Probability**

PLS

**Probability**

A binary communication system is used to send one of two messages: (i) message A is sent with probability 2/3, and consists of an infinite sequence of zeroes, (ii) message B is sent with probability 1/3, and consists of an infinite sequence of ones. The ith received bit is &#...

**math**

$30/6= $5 each pen $24/8= $3 each file If the student wants to buy 1 pen and 1 file $5 + $3 =$8 least amount that the student must pay

**algebra**

what is y=x^2-2x-8 in vertex form?

**ela**

I agree with you. I bet Ms. Sue will agree too.

**Math**

I have: Lowest number 13 Highest is 27 1st or lower quartile is 16.5 the median is 21 the 3rd or upper quartile I found between 22 and 24 which would be 23.

**physics**

1.415 kW/m^2 *ftfy

**physics**

1415 kW/m^2

**math**

Many times we change our mixed number into an improper fraction before multiplying. 5 and 1/16 = 81/16 Multiply 81/16 times 5/1 =405/16 = change this back to a mixed number by dividing by 16 = 25 5/16

**math**

Yes, it goes on forever and ever with no break. Cosine is continuous, but Tangent isn't

**Math**

First, I would get rid of the decimals. It will make life easier. So, multiply both sides of each equation by 10. (That is perfectly legal as long as you do it to both sides of an equation). 2x - 5y = -278 3x + 4y = 687 Our goal is to eliminate either the x or the y. Since the...

**Pre-calculus (trigonmetry)**

438.1

**Math - Geometry - Triangle Medians and Altitudes**

Points D, E, and F are the midpoints of sides BC, CA, and AB, respectively, of triangle ABC. Points X, Y, and Z are the midpoints of EF, FD, and DE, respectively. If the area of triangle XYZ is 21, then what is the area of triangle CXY?

**math**

Points $D$, $E$, and $F$ are the midpoints of sides $\overline{BC}$, $\overline{CA}$, and $\overline{AB}$, respectively, of $\triangle ABC$. Points $X$, $Y$, and $Z$ are the midpoints of $\overline{EF}$, $\overline{FD}$, and $\overline{DE}$, respectively. If the area of $\...

**Math**

15/27 ratio should be the same as win/162 15/27 reduces to 5/9 which will make the math a little easier. Can you finish it from here? 5/9 = win/162

**algebra**

length = 2(width) - 2 l = 2w - 2 area = lw area = (2w-2)(w) 264 = 2w^2-2w 0 = 2w^2 -2w-264 0= 2(w^2 - w -132) divide both sides by 2 0 = w^2 - w - 132 Factor and solve for w. you only want the positive value since it is a width. Once you have the width, use l=2w-2 to find the ...

**Science**

Describe the total momentum of billiard balls before and after the cue ball collides with another ball

**Art**

Bubbles is right I just got 100%

**Math**

In order to properly design a heating system for a greenhouse, the volume of air in the building needs to be determined. Find the volume of air in the greenhouse below. (3 pts)

**math**

Hi, How do I improve my math skills? I can't calculate in my head (I.e 2x43), I would actually have to write it down to solve it. I took pre-calc, calc and didn't have problem understanding. I don't know what is wrong. what should I do?

**physics**

A small ball of mass 65 g is suspended from a string of length 53 cm and whirled in a circle lying in the horizontal plane.If the string makes an angle of 28◦ with the vertical, find the centripetal force experienced by the ball. The acceleration of gravity is 9.8 m/s 2...

**physics**

A Navy jet (see the figure) with a weight of 219 kN requires an airspeed of 87 m/s for liftoff. The engine develops a maximum force of 100 kN, but that is insufficient for reaching takeoff speed in the 85 m runway available on an aircraft carrier. What minimum force (assumed ...

**Chemistry**

calculate the wavelength of a 0.245 kg baseball thrown at a speed of 40.m/s

**L.A.**

Bella Do u have the answers??

**Physics**

The crane shown in the drawing is lifting a 170-kg crate upward with an acceleration of 1.1 m/s2. The cable from the crate passes over a solid cylindrical pulley at the top of the boom. The pulley has a mass of 130 kg. The cable is then wound onto a hollow cylindrical drum ...

**Physics**

A charge of +444 μC is fixed at the center of a square that is 0.47 m on a side. How much work is done by the electric force as a charge of +5.8 μC is moved from one corner of the square to any other empty corner?

**Physics**

A 2160 kg car traveling at 10.5 m/s collides with a 2740 kg car that is initially at rest at the stoplight. The cars stick together and move 4.00 m before friction causes them to stop. Determine the coefficient of kinetic friction betwen the cars and the road, assuming that ...

**Trigonometry**

a person standing 400 feet from the base of a mountain measures the angle of elevation from the ground to the top of the mountain to be 25 degrees, the person then walk 500 feet straight back and measures the angle of elevation to now be 20 degrees, how tall is the mountain?

**Physics**

Your car is in a ditch. It requires 4500 N of force to get out of the ditch but you can only push with 750 N. What is the angle the rope needs to make, relative to straight across the road for you to be able to get the car out of the ditch? What is actually pulling the car out?

**Probability**

The conditional probability that exactly k rolls resulted in a 3, given that at least one roll resulted in a 3, is of the form: 11−(c1/c2)c3(c3k)(1c2)k(c1c2)c3−k,for k=1,2,…,6. Find the values of the constants c1, c2, and c3