Marty

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

Questions

The following questions were asked by visitors named Marty.

x^4 + x^2 - 20 Help! I have no clue how to factor this! Do i have to square root everything?

is 3n^2 - 11n + 6 factorable?!

How do you factor 6a^2 + 17ab + 12b^2

PLEASE HELP FACTOR: 1. 8x^4 - 14x^2y^2 + 3y^4 2. 10m^2 - 17mn - 6n^2

(2.7 x 10^2) x (4.23 x 10^2) PLEASE YOU SIGNIFICANT DIGITS!!! thx

The isotopes of argon have the following relative abundances: Ar-36 0.34% Ar-38 0.06% Ar-40 99.66% Estimate the average atomic mass of argon. How would I go about doing this?

Convert each quantity to an amount in moles: a) 4.27 x 10^21 atoms of He b) 7.39 x 10^23 molecules of ICl

Express each quantity as a mass in grams. a) 3.70mol of H2O b) 8.43 x 10^23 molecules of PbO2

A hydrated MgSO4 salt, weighing 3.211g, is heated in a crucible until reaching a constant weight. The weight of the anhydrous MgSO4 is 1.570 grams. 1. Calculate the moles of H20 removed and the moles of anhydrous MgSO4 remaining in the crucible. 2. What i...

How many atoms of C are contained in 45.6g of C6H6?

Chemical analysis reveals capsaicin to contain 71.0% of carbon, 8.60% hydrogen, 15.8% oxygen and 4.60% nitrogen. a) Determine the empirical formula of capsaicin b) Each molecule contains one atom of nitrogen. What is the molecular formula of capsaicin? I...

How many atoms of H are in a mixture of 3.49 x 10^23 molecules of H2O and 78.1g of CH3OH?

A hydrate of zinc nitrate has the formula Zn(NO3)2 . xH2O. If the mass of 1 mol of anhydrous zinc nitrate is 63.67% of the mass of 1 mol of the hydrate, what is the value of x?

What would be the mass of a bag of anhydrous magnesium sulfate, MgSO4, if it contained the same amount of magnesium as a 1.00kg bag of Epsom Salts, MgSO4 . 7H2O?

6ClO2 + 3H2O -> 5HClO3 + HCl a) If 71g of ClO2 is mixed with 19g of water, what is the limiting reactant? b) What mass of HClO3 is expected in part (a)? c) How many molecules of HCl are expected in part (a)? I completed part a and b but got stuck on part...

1. Water is a polar molecule. Therefore, it acts as a polar sollvent. a) Think about the following compounds: iodine, cobalt (II) chloride and sucrose (C12H22O11). Which compounds are soluble in water. b) Assume that the interaction between solutes and so...

I'm trying to find if potassium nitrate is polar or non-polar by using the electronegativity scale. Can someone check my work? Electronegativity: potassium: 0.82 nitrogen: 3.04 oxygen: 3.44 =3.44-3.04 =0.82-0.4 =0.4 =0.42 So the final answer is 0.42 and b...

At what temperatures can 40mL of water dissolve the follownig quantities of potassium nitrate? (a) 35.0g (b) 20.0g can anyone start me off with a formula or a hint?

What are some factors that affect the solubility of ionic substances?

The applied force of a 2.0-kg object is 8.4 N [E] and the friction is 2.2 N [W]. What is the motion of the object? Can I use the formula Fnet = ma?

A 2500kg car is travelling due west at 30m/s when the brakes are applied, exerting a force of 5000 N [E]. What is the car's acceleration due to the braking?

How much would a 60-kg person weight on the Moon where the gravitational field has a magnitude of 1.6 N/kg?

If you weighed 112 N on the Moon where g=1.6N/kg, how much would you weigh on Earth?

In order to make some home improvements, a home owner spent $40,000. He paid 20% as a down payment and financed the balance of the purchase with a 36-month fixed installment loan with an APR of 7.5%. Determine the home owner’s a) total finance charge and...

Calculate the work done by planet X on its moon. Planet X applies a force of 5.6 x 10^10 N on its moon and the moon is 4.0 x 10^8 km away from the planet and it continues to circle the planet in a circular orbit of circumference of 2.5 x 10^9 m.

At a height of 3.00 m above the ground, a 0.500-kg ball is thrown with an initial speed of 30.0 m/s in an arc from point A to point C. When the ball is 6.00 m above the ground travelling upward, what is the speed of the ball?

If the third harmonic of a standing wave in a vibrating string is 600 Hz, what is the fundamental frequency?

The first and second resonant lengths of an air column that is closed at one end are 15.5 cm and 45.5 cm, respectively. What is the best value for the wavelength?

A student photographs a 18cm flower so it fills half of a 24mm slide. What is the magnification?

Two identical charges are 36 mm apart. The electrostatic force between them is 1.3 N. What is the size of each charge?

socialization process of caregivers. what are the implications for patients?

he cost of producing x bags of pretzels is modelled by C(x)=0.5x^2 + x + 2 where x=# of bags per hundred. State the function that represents the average cost. Do you just have to factor it?

The cost of producing x bags of pretzels is modelled by C(x)=0.5x^2 + x + 2 where x=# of bags per hundred. State the function that represents the average cost.

Need weight of Iron vs magnesiium

An indoor physical fitness room consists of a rectangular region with a semicircle on each end. The perimeter of the room is to be a 200m running track. Find the dimension that will make the area of the rectangular as large as possible.

Find the volume of the cone of maximum value that can be inscribed in a sphere of radius 10cm.

A radius and a diameter both have to ___________.

Factor completely 6a-9a^2

Perform and give answer in simplified form Find the product (2x-5)^2

7r-3s=18 3r+7s=16 Solve by the elimination method, please.

The sum of two numbers is 32. Ten more than half of the sum of the numbers is 26. What are the numbers?

an electron in a mercury atom jumps from level a to level g by absorbing a single photon. determine the energy of the photon in joules.

Write a 200- to 300-word response to the following: What is long-term care? Provide an example. What is continuum of care services in the United States? Why is long-term care one of the greatest challenges facing the health care delivery system today?

A rocket ship at rest in space gives a short blast of its engine, firing 26 kg of exhaust gas out the back end with an average velocity of 182 m/s. What is the change in momentum of the rocket during this blast?

factor 8x^3-8x=0

FIND THE INVERSE: f(x) = 10^(5x+3) - 10 f^-1(x) =

Mandy got 22 questions correct on her test. Her grade was 80%. How many questions were on the test.

Jeff is replacing the tile on his floor. he pans to use square tiles that are 11 inches on a side. the floor is 8 feet long and 6 feet wide. cabinet in the middle of the floor that will not need tile. this space is 2 feet wide and 3 feet long. estimate ho...

An airplane has a takeoff speed of 66m/s. Assuming a constant acceleration of 1.62m/s^2, how long is the plane accelerating down the runway?

Betty is supposed to work the same number of hours each week. One week, she worked 42 hours the first week and 34 hours the second week, how many hours is Betty supposed to work?

A walking area around a pool is going to be frfinished with a nonslip surface. If it costs $17 per square foot to install what is the total cost? Inner rectangle is length 20 ft by width 10 ft. Outer dimensions of walkway are 14 length by 10ft. I have no...

If you are blowing up a balloon at a rate of 3 cubic ft per min, what is the rate of change of the radius after 30 seconds

Simplify (cos x)/(sec(x) + 1) a. cot^2 x - cot^2 x * cos x b. cot^2 x + cot^2 x * cos x c. cos^2 x + cos x d. cot^2 x - cot^2 x * sin x

Answers

The following answers were posted by visitors named Marty.

so would the final answer be (x^2 + 5)(x^2 - 4) or (y + 5)(y - 4) ???

You have to use SINE. If you draw a diagram you know that we are looking for the hypotenuse. Therefore sin50=15/x 0.766=15/x 0.766x=15 (divide by 0.766 to isolate x) x=19.58 so the kite string is 19.58m long

Because it is made up of 2 elements {carbon and chlorine}.

Does the answer have to be in scientific notation? If so, how would you figure it out?

4C + S8 -> 4CS2

How do I change the weight of the water removed into moles?

Would the weight of the water removed be 3.211g - 1.570 g?

Was there math involved in this or do you just look at the subscripts?

You look at which column it's in (seventh). that means its outer shell has 7 valence electrons

that doesn't answer the question. what is the molecular formula of capsaicin and please show work

Well i found the moles of each element. Carbon has 5.91mol Hydrogen has 8.51mol Oxygen has 0.988mol Nitrogen has 0.328mol Then I put the moles as subscripts and divded each subscript by the lowest amount of moles (nitrogen with 0.328mol). Then as the empi...

Awesome! Thanks

Could you explain the steps you did for the first part? Do I multiply 3.49 x 10^23 by the mass of H2O?

So I calculated the mass of MgSO4 (120.37g/mol) and the mass of 7H2O (126.14g/mol). Then I divided the mass of MgSO4 by MgSO4 . 7H20 multiplied by 100%. My answer was 95.426%. But how do I get the amount of magnesium?

That helps! Thanks!

Would this be a correct general statement about the type of solute dissolves in non-polar solvents: Compounds that are non-polar will dissolve in non-polar solvents. Do you have any tips on how I could elaborate on this?

Could you explain your "like dissolves like" statement?

Would a solubility curve help?

on the x axis is temperature (degrees celsius) and on the y axis is solubility (g/100g H20). Is there any mathematical way to figure this out instead of using the solubility curve.

what are the units of 100 and 40?

The proper form would be -x^2 +2x -1. You could also put it as x^2 -2x -1. Either way they will both factor the same. Just make sure its in standard form (ax^2 +bx +c)

the interest charge would be 11.96*36 = $3833.60 a difference of 76 cents Hi how did you get the 3833.6 from multiplying 11.96*36. Thanks

Read, Recite, Review! It always works.

Actually it is called the SQ3R method, my bad.

i woudn't know the answer to this ? but i would think there is

i do not ahve a clue but then again im only in 7th grade

the answer to this question is OMG THAT ISHARD JESE KID WAT GARDE R U IN

woops i mean this........ the answer to this question is..... OMG KID THAT IS HARD, WHAT GRADE R U IN

I don't quite understand

Functioning labor unions

aren't you supposed to plug everything in AFTER you derive it?

answers b,d 100% connexus

Determine the sign of the product of −152×−1. Enter + for positive or – for negative.(1 point)