Corey

This page lists questions and answers that were posted by visitors named Corey.

Questions

The following questions were asked by visitors named Corey.

What is (+3)-(-7)=

A balloon is filled with He to a pressure of 1.06 atm. The volume of the balloon at 25oC is 1.30 x 104 L. How many cylinders of He gas are needed to fill the balloon if the pressure in the cylinder at 20oC is 98.5 atm and the volume of the cylinder is 40....

Hey I have the AP Chem test coming up and i was wondering where I could find the answer key to some of the AP Chemistry tests like 1994, 1999, and 2002 MC and FR

calculate the mass in kg of an object that weighs 1225 n on earth

Annie has quarters and dimes in her bank. There are 8 less than 4 times as many dimes as quarters. There is $6.35 in her bank. How many dimes are in her bank?

I need to equal $1.00 and 30 grams With quarter .25=6 grams dime .10=2 grams nickel .05=5 grams

Of the 6 kingdoms of life, which is (are) both single-celled and eukaryotic?

This is my question from my paper. Describe the physical difference between a psuedocoelomate and a coelomate. Which one allowed the animals to grow bigger, faster, and stronger and explain why?

In the sentence Manuel is the new goalie on the team. What is the compound noun

A right circular cone has a fixed slant height, s= 12 inches. Determine the radius and the height of the cone with maximum volume

A person jumps from the roof of a house 3.0 m high. When he strikes the ground below, he bends his knees so that his torso decelerates over an approximate distance of 0.60 m. The mass of his torso (excluding legs) is 48 kg. *How do I find the average forc...

A 239-kg log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. The ramp is inclined at 29.0° with respect to the horizontal. The coefficient of kinetic friction between the log and the ramp is 0.800, and the log has an ac...

101-102=1 move position of 1 digit to make statement correct

why did president johnson would find it necessary to encourage congress to cooperate with him? thank you

How much can the average person remember?

how many protons and nuetrons are contained in the nucleus of each of the following atoms? assuming each atom is uncharged, how many electrons are present? a. 235/92U b. 13/6C c. 57/26Fe d. 208/82Pb e. 86/37Rb f. 41/20Ca

Ok I got a question I'm confused by the compression ratio bit in this problem and don't know how to do it If 3.00 m^3 of a gas initally at STP is placed under a pressure of 3.20 atm, the temperature of the gas rises to 38.0 degrees C. What is the volume?...

a 3.7 kg dog stands on a 19 kg flatboat at distance D = 6.1 m from the shore. It walks 2.6 m along the boat toward shore and then stops. Assuming no friction between the boat and the water, find how far the dog is then from the shore. _ _ _ _ _ _ m

The roof on a house rises 1.50 m over a horizontal diestance of 3.50 m. A 72.9-kg roofer stands on the roof. Is the frictional force that keeps the roofer from slipping equal in magnitude to F perpendicular or F paralell? What is its magnitude?

A car weighing 1.1*10^4 N is parked on a 35 degree slope. Find the force tending to cause the car to roll down the hill. What is the force the car exerts perpendicular to the hill?

A 23 kg suitcase is being pulled by a handle that is at an angle of 22 degrees above the horizontal. If the normal force exerted on the suitcase is 185 N, what is the force applied to the handle? *** Objects NOT on an incline they are being pushed/pulled...

How do you download music from jiskha?

Compare and Contrast the characters Natty Bumppo in The Prairie and John in Hospital Sketches.

I have been pouring over this all day and would appreciate if someone could look this over for me with some good news... am I getting it? Gracias! >> represents my chosen answer. 1. Having studied small engine repair in night school, fixing the lawn mower...

I submitted this yesterday and Ms. Sue thought I did well (except 7,11) but I still managed to get 4 wrong - and my mind is a mess trying to figure out where I went wrong! Please help - my mid is coming! >> represents my chosen answer. 1. Having studied s...

Did I use semi-colons properly in this sentence? Tesla's accomplishments include inventing alternating current, contributing to the fields of robotics, computer science, and wireless technology; he also helped increase knowledge of nuclear physics, ballis...

A 38.2 kg wagon is towed up a hill inclined at 19° with respect to the horizontal. The tow rope is parallel to the incline and exerts a force of 140 N on the wagon. Assume that the wagon starts from rest at the bottom of the hill, and disregard friction.H...

Suppose X is N(4,2) and Y is N(10,1). what kind of distribution is 2X+Y? What is its mean and standard deviation if X and Y are independent?

C3H8+5O2--->3CO2+4H2O is this chemical equation correct and equal? If not why?

Ten years ago, Levin Inc. earned $0.50 per share. Its earnings this year were $2.20. What was the growth rate in Levin's earnings per share (EPS) over the 10-year period?

To move a crate across a rough floor, you pull on it at an angle of 21 degrees above the horizontal. How much force is needed if the mass of the crate is 32kg and the coefficient of static friction between the crate and floor is 0.57

in segment pt, l is the midpoint of pa and a is the midpoint of pn. if pn = 17 and la = 3.5, what is the length of nt?

A golf ball of mass 0.05 kg is struck by a golf club of mass m kg with a speed of 50m/s will have an initial speed of v(m)=83m/(m+0.05) m/s. show that v'(m)>0 and interpret this result in context with the application. Compare v'(0.15) and v'(0.20) in cont...

Two blocks of masses m1 = 2.00 kg and m2 = 4.50 kg are each released from rest at a height of y = 5.80 m on a frictionless track, as shown in the figure below, and undergo an elastic head-on collision. (a) Determine the velocity of each block just before...

Where can the lines containing the altitudes of an obtuse triangle intersect? I. inside the triangle II. on the triangle III. outside the triangle A)I only B)I or II only C)III only D)I, II, or III PLEASE HELP ME ASAP!!!!

a 4 kg block is being pulled by a string at a constant speed on a surface with coeficient of kinetic friction of .3. If the string is at an angle 45 degrees above the horizontal, what is the magnitude of the force F(also known as the string)?

Find the area between the following curves y1= x2−4x+3 y2=−x2+2x+3

Which of the following choices is correct? A. 0.43<4/5 B. 2/3<.07 C. 1/2<.09 D. 1/3>.35

find least common denominator for these fractions 5/7 and 4/6

A student, crazed by the first physics Midterm, uses a pushing force of 80 N angled at 70° to push a 5.0 kg book across the frictionless ceiling of his room. a. What is the block's acceleration? b. What is the force of the ceiling on the book?

Is it possible to have more than one vertical line of symmetry? Why???

I am so lost I have a problem. Two congruet figures. First trapezoid: 1 side b is 10 1 short base prarallel 6 Angle D 86 degrees Angle C 41 degrees Angle B ? Angle A ? Other angle J is 133 degrees Angle M ? Angle K ? Side d leg 17 Angle L ? long Base para...

If, I ahve a trapezoid with two angles Angle 86 degrees and 41 degrees and angle A 133 degrees then,side b 10 Short base 6 How do I solve to get angle B?

The volume of a cylinder is 980 in.4072-07-02-02-00_files/i0220001.jpg. The height of the cylinder is 20 in. What is the radius of the cylinder? Express your answer to the nearest hundredth.

Why is it better to NOT use a letter that stands for the " unit name" such as s and t that stand for students and teachers as a variable?

Which number is larger .545 or .54 repeating?

What is the coefficient of friction on a 221.9 gram block of wood with 150 grit sandpaper on the bottom being pulled by .392 newtons. NEED HELP IMMEDIATELY!!!!!! Please and thank you

In Canada, $1 and $2 bills have been replaced by coins. When Marissa returned home from to San Francisco from a trip to Vancouver, she found that she had acquired 37 of these coins with a total value of $51 Canadian. How many each denomination did she hav...

how to solve 3/(x^2-9)-x/(x^2-6x+9)+1/(x+3)

1. A square piece of cardboard measuring 60 inches on a side is made into a rectangular box by cutting identical squares from the four corners and then folding up the flaps. Let represent the length of the side of the discarded square. Write a formula for...

I cannot figure out the missing value. 7^ 8 6 13=84

The approximate rate of change in the number of subscribers to wireless service is given by f’(t) = 1.498t + 1.626, where t represents the number of years since 1990. In 1992 (t = 2) there were approximately 8.893 million subscribers. Find the function th...

How do i write a equation of 8x+x^2-2y=64-y^2 ?

What is the morality of a solution made by dissolving 9.80 g of H2SO4 in a 200.0 g of H2O?

Find the volume of the solid formed by rotating the region inside the first quadrant enclosed by y = x^3 y = 16 x about the x-axis.

A 2.0 kg box moves back and forth on a horizontal frictionless surface between two different springs with one 32 N/cm and the other at 16 N/cm.The box is initially pressed against the stronger spring, compressing it 3.5 cm , and then is released from rest...

If I spend one third of my money on ice cream an half on a book what fraction of my money would I have left

A recipe calls for 3/4 cup of flour to make 18 cookies. How much flour is required per cookie?

As a van is turning left in an intersection, it crashes into an oncoming car. The van has a mass of 4000 kg and was traveling 55° East of North at 12 km/h before the crash. The car has a mass of 2500 kg and was traveling West at 55 km/h before the crash....

Babies born weighting 2500 grams (about 5.5 pounds) or less are called low-birth-weight babies, and this condition sometimes indicates health problems for the infant. The mean birth weight for children born in a certain country is about 3462 grams (about...

Answers

The following answers were posted by visitors named Corey.

Well i tried to get the empirical formula but i got H2NO, how do i use the density, 2.86.

I am not sure how to find the molar mass using the 22.4 L at STP

So is H2NO correct?

the molar mass is 64.064 g/mol

it should be H2NO3

Ok so i am done with D

Because when i add the atomic masses i dont' get 64

the formula mass is 32

C would be NH4NO3

Ok but i am confused of how to use the info for B

I got the mols compound B = .002198 when i did the 21.98ml * 1M

Is this correct? the molar mass of B is 330.3

Hey i got the molar mass of B to be 330

oh ok my bad so the molar mass is 33.03

so now how do i find the formula

would it be NH2OH

would A be HNO3 and E be NH3

yes i can do them so i don't need to do any work for A and E?

Ok thanx alot i appreciate it

Ok thanks i guess i will try the google thing because i need to see if mine are right

the answer given to you was wrong i don't know how to do AlH3 but the others are tetragedrals and have four pairs

but i solved for the force and it did not come out as the right anser i did Fd=mgh then said F(.6)=(48)(9.8)(3) but its wrong???

(180/760)+(0.95)

That answer is not right.

I wish someone could have just explained what the teacher meant by the role of education in successful financial planning.

there isn't anything on the other post either

This is the wrong answer, do not copy it

Initial balance = 2,539.78 withdraw (out of account) = -150.00 credit (into account) = 6.19 total change in the account = -150 + 6.19 = -143.81 Initial balance - total change = 2,539.78 - 143.81 = final balance

10(x+h)^2+9(x+h)+10-(10x^2+9x+10) 10(x^2+xh+h^2)+9x+9h+10-10x^2-9x-10 10x^2+10xh+10h^2+9h-10x^2 10xh+10h^2+9h

1. b 2. c 3. d 4. a 5. b 6. d 7. a 8. c 9. d 10. c (? That's how many for humans) 11. d 12. a 13. d 14. c 15. d 16. c 17. c 18. d 19. a 20. b

(5.40M)*x=(0.150L)(0.510M) x=0.0142 L

Energy=(25.0g)(2.10J/g)(93+10) Energy=5407.5 J*(1 KJ/ 1000 J) Energy= 5.41 KJ

4NH3+5O2-->4NO+6H2O 4.5g*(1 mol/32g)*(4 mol/5 mol)*(16.03g/1 mol) 1.8g Ammonia

2Na+2H2O-->2NaOH+H2 2 mL H2O*(1g H2O/1 mL H2O)=2 g water Since this is more grams than the sodium, and there is a one to one ratio, the sodium is limiting. 1.2g Na*(1 mol Na/22.99 g Na)*(2 mol NaOH/2 mol Na)*(40 g NaOH/1 mol NaOH) 2.1 g NaOH

A. Hormones control things to the extent of the speed of metabolism, levels of sugar in the bloodstream, etc. Although D is also true, it is not the best description.

The probability for the first is 6/10 (3/5). The probability for the second is 5/9. Multiply them for your answer, 1/3.

a) The probability for one or the other is 10/4280 (1/428). For one of the two, add each of their probabilities (1/428)+(1/428) gives an answer of 1/214. b) The probability for any one child is 4/4280 (1/1070). Adding together the three children's probabi...

2H2O(g)-->2H2O(l) -88.0KJ 2H2O(l)-->2H2O(g) 88.0 KJ +2H2O(g)-->O2+2H2 483.6 KJ 2H2O(l)-->O2+2H2 571.6 KJ 571.6 KJ/mol

Density= mass/volume 63.3g/45.0 mL 1.4 g/mL

let x=pile one x-10=second pile x/2=third pile x+(x-10)+(x/2)=3000 2x+x/2=3010 4x+x=6020 5x=6020 x=1204 The third pile is x/2, so the third pile has 1204/2, or 602 books.

distance=rate*time d=rt wind speed=w plane spee=180+w d=[(180+w)+w]*3 With wind d=[(180+w)-w]*4 Against wind [(180+w)+w]*3=[(180+w)-w)*4 (180+2w)3=180*4 540+6w=720 6w=180 w=30 The wind speed is 30 mph. The plane in still air is 180+30, or 210.

Let Ones digit=x Tens digit=10y Hundreds digit=100z 100z+10y+x=? z=6 z-3=y x=y 6-3=y=3=x z=6 y=3 x=3 100(6)+10(3)+3= 633

M1V1=M2V2 (1.000x10^3 mL)(.00383 M)=x(25mL) x=.1532 M

density=mass/volume 5.00cm*3.00cm*1.00cm=15.00cm^3 (or 15.00 mL) 52.5g/15.00 mL= 3.50 g/mL

The M stands for the unknown element; it binds to the Bromine. Bromine has a -1 charge, and there are three, it is highly likely that the element is Aluminum or Boron. 27.765 g MBr3-2.809 g M=24.956 g 3Br- 24.956 g Br* (1 mol Br/239.7 g)= .104 mol Br This...

Let ones=x tens=y hundreds=z thousands=a a+x+y+z=15 x=1+y y=a+1 z=x+a y=3 x=1+(3) x=4 (3)=a+1 a=2 z=(4)+(2) z=6 2634

Speed of sound = 1498 m/s The sound takes 1.95 s to travel from the boat to the bottom and back. Half of this time is how long it takes to reach the bottom. So 1.95s/2 = time to travel from boat to the bottom. velocity = distance / time. since you now kno...

The verb is crap

You have to multiply the 3.7e10 by the 16mCi, and then divide by 1000. Disintegrations/s, and bq will be the same. Remember sig figs....

its okay I just got the answer from someone elses answer. thanks anyways though. :)

almost perfect using the pascals for pressue, but you need to put in into Celcius. the T in PV=nRT is in kelvins... so minus 273 from your original answer with the pascal units of pressure.

nevermind im having the same issues. this program is worse than HIV

apparently you need to use absolute psi which is 14.7+gauge pressure.... then convert that into pascals and use PV=nRT...

Thank you Mr. Knights so mych. You explained it to me well.

Sorry second half up there is the other trapezoid.

I got 100 degrees for the 4th angle, is this right? Also, the numbers around the shape I don't do anything for them?

I got 260 degrees

I understand the degrees problem, but confused on the non degree numbers I mentined above? 10 and 6 around the shape?

AD and BC are parallel The short base parallel is AD with 6 in the middle, but angle D has 86 degrees. BC long base paralle has no number but angle c is 41 degrees. The side leg AB has a number 1o, but A has angle 133 degrees. Make sense?

AD and BC are parallel The short base parallel is AD with 6 in the middle, but angle D has 86 degrees. BC long base paralle has no number but angle c is 41 degrees. The side leg AB has a number 10. I took out the 133 degrees on angle A

Oh and nothing between DC or between BC. Shape looks like a trapezoid.

Ok, sorry not a trapezoid. Do you normally !!! this to kids?

Your right of course on the shape. I can not find the exact shape name. I will figure it out. But if you can tell me when the shape has numbers, not degrees, on the sides what do I do with them? If I have angle D 86 degrees, Angle C 41 degrees and angle A...

Are the parallel bases AB and CD? yes

Yes you nailed it. :))) Thank you. And for not giving up on me. I thought you did. Thank you :))

Thank you both of you guys. Details helped a lot. I was stressing on this one.

My brother didn't explain what he was asking enough.

I'd love to know myself, chem is so stupid and a waste of time am I right?

Yes sorry auto correct

The bounds should be 0 to 5, I'm not sure where the 10 is coming from. Also, the answer of 5pi/4 is incorrect

I think it would change the answer because doesn't the 1/10 become 1/5 if we correct the error? Sorry, I just really have no idea how this problem works or how to do it.

Hey man both of our names start with C

So what's the answer I need to check mine I know mine's completely wrong I need serious help with this.

Its "D" if your on connexus

Pakistan has a federal parliamentary republic type of government and is known as the Islamic Republic of Pakistan. It has administrative areas called provinces and territories. The Government of India , known as the Union Government or Central Government...