# If the relative atomic mass of CH2O is calculated it's empirical formula (C=12,H=1,O=16)

46,086 questions, page 234
1. ## general chemistry

the radius of a chlorine atom is 99 pm and its mass is 5.89 X 10^-23 grams what is the density

asked by melissa on February 6, 2013
2. ## chemistry

What is the mass, in grams, of 7.40×1020 molecules of caffeine, C8H10N4O2

asked by fatima on July 24, 2013
3. ## physics

What is force of attraction between two students of mass 20kg,10meters apart?

asked by Grace on June 5, 2011
4. ## Chemistry

If you were given 0.021 milligrams of the compound,H3PO4, what would the mass of H in the sample be?

asked by Ariana on February 16, 2011
5. ## Phsyics

Two objects attract each other gravitationally with a force of 2.1×10−10 when they are 0.21 apart. Their total mass is 4.00 .

asked by Michael on April 3, 2010
6. ## physics

A mass accelerate uniformly when the resultant force acting on it is what?

asked by Niyi on June 24, 2013
7. ## Chemistry

How many moles of H atoms are there in 21.66 g of Mg(OH)2? What is the mass of F (in g) in 8.03 x 1023 BF3 molecules

asked by Shanon on February 3, 2013
8. ## Science

How can you make density of 1g/ml, for a 600 ml bottle whose mass is 27 gms

asked by Anonymous on March 21, 2011
9. ## Chemistry

A solution is 25% by mass calcium nitrate and has a density of 1.21 g/mL what is the molarity?

asked by Adrian on May 12, 2016
10. ## physics

Find the mass in grams of a carbon dioxide molecule.

asked by cindy on March 25, 2012
11. ## Chemistry

What is the mass of Na2SO4 is needed to make 1.5 L of 3.0 M solution? Na=23 g.: s = 32 g: O=16g.)

asked by Lori on March 14, 2016
12. ## Chem

Which of the following has the largest molar mass? A. Water B. isopropanol C. ethanol

asked by Anonymous on May 4, 2008
13. ## chemistry

what is the volume of a piece of wood that haas a mass of 6 g and a density of 0.5 g/mL?

asked by Anonymous on January 23, 2011
14. ## chemistry

calculate the mass of sulfur in 6.0 g of Iron (III) sulfate

asked by payton on October 25, 2011
15. ## physics

What.is.the.weight.of.a.150.lb.person.in.newtons?.what.is.his.mass.in.kilograms?

asked by melissa on January 19, 2008
16. ## physics

Find the number of atoms in a gold ring of mass 6.43 g.

asked by cindy on March 25, 2012
17. ## Physics

what must be the net force if a 19.9 kg mass accelerates to the left at a rate of 2.2m/s^2?

asked by Bridget on September 8, 2016
18. ## Physics

A force of 0.20N acts on a mass of 100g. What is the acceleration?

asked by Mike on January 26, 2010
19. ## physics

a frieght train rolls at the same speed but has twice as much mass its momentum is

asked by cynthia on February 1, 2013
20. ## Science

How can you make density of 1g/ml, for a 600 ml bottle whose mass is 27 gms

asked by Anonymous on March 21, 2011
21. ## Chemistry

What mass of protons would be required to just neutralize the charge of 1.5 g of electrons?

asked by Evy on September 21, 2010
22. ## 9th grade

calculate the mass in kg of an object that weighs 1,225 N on earth.

asked by susan on September 7, 2010
23. ## CHEMiSTRY PLEASE HELP

What is the mass of 4.2 kg of gold when it is transferred to a planet having twice the gravity of earth?

asked by Jess on September 27, 2009
24. ## Chemistry

what is the percent by mass of oxygen in propanal, CH3CH2CHO? the answer is 27.6 %. but i need to know why, please help !

asked by lisa on February 2, 2011
25. ## Chemistry

What is the molality of an aqueous solution that is 10.0% ethanol, C2H5OH, by mass?

asked by Marcus on February 10, 2013
26. ## physics

what is the heat capacity of a gold ring that has a mass of 5.00g?

asked by miles on April 4, 2012
27. ## science equations

what is the acceleration of a 8.4 kg mass if a force of 64.8 n is used to move it toward earth?f=mxa

asked by summer on January 24, 2008
28. ## Ap physics

Determine the mass of the earth from the known period and the distance of the moon

asked by Marc on October 25, 2016
29. ## Physics

the force required to accelerate a mass of 10.0kg at 4.00m/s^2 is

asked by John on November 23, 2010
30. ## Science

How do you find the density of a cyclinder if you are only given the diameter, height and mass?

asked by Natalie on September 16, 2007
31. ## Chemistry

The boiling point of another member of this homologous series was found to be 309 K. What is the likely molecular formula for this compound? How many carbon atoms would you expect this new compound to have if its boiling point is between that of a

asked by Alison on March 14, 2011
32. ## Science chemistry

Determine the number of moles of oxygen in 1 mol of dinitrogen tetraoxide N2O4= N 2×14.01g/mol= 28.02g/mol O 4×16.00g/mol= 64.00g/mol N2O4= 92.02g/mol I can't get the right formula to solve the rest. Please help and thank you

asked by Farhin on November 30, 2016
33. ## Calculus

(a) Find the tangent line approximation for sqrt(9+x) near x=0. (b)Find a formula for the error, E(x),in the tangent line approximation found in part (a). For part A, is the answer y=3. For part b, I don't understand , any help would be greatly

asked by George on November 5, 2008
34. ## chemistry

A sealed container comtains 1.50 mol of nitrogen gas, 2.00 mol of oxygen gas and 3.50 mol of argon gas. If the total pressure is 900 kPa, what is the pressure of the nitrogen gas? I don't know which formula to use

asked by Cutter on January 19, 2015
35. ## algebra

the formula d=(square root)12,800+h^2 gives the distance d in kilometers to the horizon from a satellite h kilometers above Earth.Find the distance to the horizon to the horizon from a satellite 4200 km above Earth. Round to the nearest kilometer. PLEASE

asked by alexis on December 6, 2012
36. ## Math

one Percentage increase / decrease formula in excel that full all the conditions that are mentioned below 2012 2011 1 0 0 2 0 500 3 500 0 4 500 1000 5 1000 500 6 500 (1000) 7 (1000) 500 8 (500) (1000) 9 (1000) (500) Dear its urgent

asked by Muhammad Ashfaq on October 31, 2012
37. ## Mathematics

Hello, I am currently computing the "efficiency index" of an iterative method, given by this formula E = p^(1/m), where p is the order of the method and m is the number of functional evaluation of the iterative method. However, i do not know how to compute

asked by Gabriel on October 18, 2017
38. ## Math

one Percentage increase / decrease formula in excel that full all the conditions that are mentioned below 2012 2011 1 0 0 2 0 500 3 500 0 4 500 1000 5 1000 500 6 500 (1000) 7 (1000) 500 8 (500) (1000) 9 (1000) (500) Dear its urgent

asked by Muhammad Ashfaq on October 31, 2012
39. ## algebra

World Records in the 1500-m Run. The formula R = -0.075t + 3.85 can be used to predict the world record in the 1500-m run t years after 1930. Determine (in terms of an inequality) those years for which the world record will be less than 3.5 min.

asked by martin on June 2, 2015
40. ## organic chemistry

i'm having trouble figuring out my unknown compound. The elemental analysis is 87.28%carbon and 12.72% hydrogen for my unknown liquid, and for my solid unknown the elemental analysis is 79.22% carbon and 5.7% hydrogen and 15.98% oxygen. I'm not able to

asked by susan on August 19, 2009
41. ## Writing / History

Help needed coming up with a specific thesis. Here is the prompt: Explore the role of women in Archaic Greek society as presented in the literature examined in class (The Iliad, Sappho's poems, Archilochus, and a book about Ancient Greece by Thomas

asked by Claire on March 9, 2010
42. ## US History

Why did many progressives of both major parties saw American entry into World War I as a peerless opportunity? Many Progressives during the First World War, Republican and Democrat alike, realized something of great importance to furthering their goals:

asked by Jason on March 11, 2012
43. ## Physics-Mechaincs

A rowboat crosses a river with a velocity of 1.01 m/s at an angle 30◦ North of West relative to the water. Water’s frame of reference: speed of boat: 1.01 m/s direction from current: 30◦ The river is 322mwide and carries a current of 1.63 m/s due

asked by Genevieve on September 19, 2010
44. ## relative velocity

A radar antenna is tracking a satellite orbiting the earth. At a certain time, the radar screen shows the satellite to be 159km away. The radar antenna is pointing upward at an angle of 59.3 from the ground.Fine the x and y components(in km) of the

asked by leann on February 1, 2007
45. ## Physics

In the figure below, a runaway truck with failed brakes is moving downgrade at 114 km/h just before the driver steers the truck travel up a frictionless emergency escape ramp with an inclination of 15°. The truck's mass is 5000 kg. (a) What minimum length

asked by Rachel on February 27, 2013
46. ## Astronomy

1. What color are stars that are very hot and very bright? A. Red B. Blue C. White D. Yellow 2. During the contraction of a protostar, density increases and ______ rises. A. Nuclear energy B. Dust C. Temperature D. Outflow 3. What is the apparent

asked by M on April 22, 2017
47. ## Chem

Find the constants (a and b) for O2 in Table 5.7. Use the Van der Waals equation to determine the pressure of 1.000 mole of O2 if the gas occupies 22.50 liters at 27.00 oC. First, find the values for each of the two terms in the equation, then find the

asked by Feather on October 11, 2014
48. ## physics

Gravity on the moon is only 1/6 as strong as gravity on earth. What is the weight of a 20 kg object on the moon and on earth? I have to find it in Newtons on earth and on the moon. WeightinNewtons= mass* gravity field on earth, the gravity field is

asked by Jennifer on September 20, 2006
49. ## Math

Ali tosses 3 number cubes,and then multiplies the results using the formula a x(bxc)and (axb)x c. Which property of multiplication does Ali use? a(Associative Property Of Multiplication b(Commutative Property Of Multiplication c(Distributive Property Of

asked by Sara Pleaseee pleasse on December 7, 2011
50. ## Math Help

Ali tosses 3 number cubes,and then multiplies the results using the formula a x(bxc)and (axb)x c.Which property of multiplication does Ali use? a(Associative Property Of Multiplication b(Commutative Property Of Multiplication c(Distributive Property Of

asked by Sara Pleaseee on December 7, 2011
51. ## physics

A pendulum is formed of a particle of mass 100g suspended from the end of an inextensible string of negligible mass and of length L=100cm. The pendulum is shifted by an angle of 60 degrees from its equilibrium position about a horizontal axis passing

asked by vicky on September 21, 2016
52. ## physics

A pendulum is formed of a particle of mass 100g suspended from the end of an inextensible string of negligible mass and of length L=100cm. The pendulum is shifted by an angle of 60 degrees from its equilibrium position about a horizontal axis passing

asked by vicky on September 21, 2016
53. ## Pipeline design

Sketch a preliminary layout for the following heat exchanger systems. On the layout sketch indicate pipe work manifolds, access platforms, access for construction, operations and maintenance. In your answer we are looking for thought into the relative

asked by Tony on November 14, 2013
54. ## Algebra

John Goodman weighs 250 pounds, so he decides to go on a diet. At the end of the first week, he weighs 240. Then at the end of the second week, he weighs 230. Fill in the blanks of the arithmetic formula [ A(n) = d + a^1(n – 1) ] for this scenario. A(n)

asked by MsSuePlzHelpImsoConfused on November 23, 2018
55. ## Physics

A blue billiard ball with mass m crashes into a red billiard ball with the same mass that is at rest. The collision results in the blue billiard ball travelling with a velocity of v and the red billiard ball with a velocity of 3V. In terms of v and m

asked by Student12 on March 23, 2017
56. ## Physics

A particle of mass m kinetic energy K momentum p collides head on elastically with another particle of mass 2m at rest A) Momentum of first particle ? B) momentum of second particle? C) kinetic energy of first particle? D) kinetic energy of second

asked by Thousif on August 22, 2017
57. ## Relative Acidities

Rank the given compounds on their relative acidity. Here was the order I thought it was but it turned out to be wrong. (i based it based off of sp being most acidic and sp3 being least acidic) STRONGEST HC(triple bond)C-CH3 H2C=CH2 CH3NH2 H2O CH4-->

asked by Allie on February 16, 2011
58. ## ALgebra 1

4. Write the equation of a line whose slope is 6 and whose y intercept is -3. The answer would be y=6x-3 This is the y-intercept formula (y=mx+b) where m is the slope and b is the y-intercept. Thanx What about this one?Can you plz help? 6. What happens to

asked by Mary on October 26, 2006
59. ## Chemistry

Given data collected for a liquid. Equilibrium vapor pressure in torr: 4.6, 17.5, 149.4, 525.8 T in *C 0., 20., 60., 90. *Find T in K, Find 1/T in K-1 and 1n VP. *Then make a graph of 1n vapor pressure (1n VP) versus 1/T (where temperature is in units of

asked by Anonymous on July 29, 2008
60. ## calculus

an amount of 1000 is deposited in a bank that pays 8% interest/year compounded daily (take the number of days in a year to be 365) let an denote the total amount on deposit after n days, assuming no deposits or withdrawals are made during the period in

asked by sofi on May 20, 2012
61. ## Physics

For a question in physics... I was told to draw a graph of vertical displacement, y, versus time, t, in 2sec increments from 0 to 1.8. What was given to me was: v_yo_= +10m/s v_xo_= +5m/s a_y_ = -10m/s^2 So I used the formula: y=vo+1/2at^2 I drew the

asked by Jenny on October 1, 2007
62. ## Math

The maximum horizontal range of a projectile is given by the formula R=u^2/g, where u is the initial velocity and g is the acceleration due to gravity. Find the velocity with which a ball can be thrown to have a maximum range of 20 meters when the

asked by John Dosley on September 18, 2016
63. ## Probabilities

A brand name has a 40% recognition rate. If the owner of the brand wants to verify that rate by beginning with a small sample of 10 randomly selected consumers, find the probability that exactly 4 of the 10 consumers recognize the brand name. Also find the

asked by Sharie on November 26, 2013
64. ## permutations in math

suppose 15 countries compete in an olympic event. gold, and silver,and bronze medals are awarded. how many different arrangements of winners are there if no country wins more than one medal in this event? show the work. thanks. 15 countries can get the

asked by dillon on April 9, 2007
65. ## Physics

Hey I'm not sure how to solve this problem: An 1840 kg car is moving to the right at a constant velocity of 2.94 m/s. What's the netforce? What's the netforce if the car would be moving to the left? I'm thinking that the net force going right and the net

asked by Robert on September 16, 2008
66. ## Maths/Algebra/Calculas

A square piece of paper 20cm by 20cm has equal sized squares cut from each corner, size x. What is the formula to work out the volume of this? Also what size squares cut at each corner would produce the largest volume open top box? Thanks for any help,

asked by Callum on May 21, 2014
67. ## Math 2nd question

Express as a single sine or cosine function (note: this is using double angle formulas) g) 8sin^2x-4 I just don't get this one. I know it's got something to do with the 1-2sin^2x double angle formula. It's the opposite though? :S h) 1-2sin^2 (π/4-x/2) =

asked by Alex on November 27, 2007
68. ## math

Amount of an investment. The amount of an investment of P dollars for t years at simple interest rate r is given by A  P  Prt. a) Rewrite this formula by factoring out the greatest common factor on the right-hand side. b) Find A if \$8300 is invested for

asked by naine on September 5, 2010
69. ## math

A ball is kicked from ground level into the air. Its height, y, in feet after x seconds can be represented by the equation y=40x - 16x^2. What is the total elapsed time, in seconds, from the time the ball is kicked until it reaches ground level again? I

asked by Jane on May 10, 2013
70. ## Math Calculus

A sphere is initially measured as having a radius of 4 inches. A subsequent measurement shows that the radius is really 3.99. Find (a) the actual difference in volume between the initial measurement and the correction, and (b) the difference as estimated

asked by Megan on July 8, 2011
71. ## science

an electron is released into a uniform electric field of magnitude 1.5 x 10^3 N/C. Calculate the acceleration of the electron, neglecting gravity. I know that if a charge is released in the electric field, it experiences a force and accelerates, gaining

asked by becka on January 26, 2011
72. ## chemistry

1. In an ice calorimeter experiment, what is the relationship between joules and volume change expressed in joules/mL of volume change? a.) The specific volume of H20(l) is 1.001mL/g b.) The specific volume of H2)(s) is 1.092mL/g c.) The latent heat of

asked by xx on November 15, 2014
73. ## Physics

i have a graph that shows the motion of a cyclist. as the velocity(m/s) goes up:1, 2, 3... the elapsed time(s) also increases, 2, 4, 6... when the velocity is on 2 the time is on 2, when the velocity is on 3 the time is on 4... the line that is drawn

asked by y912f on January 30, 2009
74. ## maths exponential functions

I have a maths assignment and i need help with this question my teacher is overseas at the moment and it is due when he gets back The Population P, of penguins in a certain region of Antarctica can be modeled by the relation P=Po (2) t/90, where t is time,

asked by Josh on March 11, 2011
75. ## Pre-Cal

This exercise is based on the following table, which lists interest rates on long-term investments (based on 10-year government bonds) in several countries in 2008. Assuming that you invest \$12,000 in the Japan(1.5%), how long (to the nearest year) must

asked by Rick on February 29, 2012
76. ## Physics

Could someone try helping me solve those 2 questions or write me a formula with equaion what to do , thanks for every bit of help A 600kg elevator accelerates upward from rest for 10 seconds through 40.0meters. Find the cable tension a) 5130 N b) 5400 N c)

asked by needhelp on January 27, 2010
77. ## Physics

A ball of volume V=8 L is full of air with pressure higher than atmospheric pressure by ?p=2×104 Pa. The total mass of the ball and the air inside is 200 g. The ball is tossed up to a height h=20 m, then it falls down, collides with the ground, and

asked by abc Please help URGENT on May 4, 2013
78. ## Chemistry

The reaction of aqueous aluminum sulfate and aqueous calcium nitrate is represented by the balanced ionic equation. 2Al3+(aq) + 3SO42-(aq) + 3Ca2+(aq) + 6NO3-(aq) → 3CaSO4(s) + 2Al3+(aq) + 6NO3-(aq) Give the balanced formula equation for the reaction.

asked by YeJin on June 4, 2010
79. ## URGENT, Calculus!

A science project studying catapults sent a projectile into the air with an initial velocity of 30 m/s. The formula for distance (s) in meters with respect to time in seconds is s = -4.9t2 + 30t. Find the instantaneous rate of change (and thus the velocity

asked by Vanessa on July 10, 2008
80. ## Math

5)Solve 2x2 +6x = 4 by completing the square. 6)Solve 3x2 - 6x- 24 = 0 using the quadratic formula. 7)The area of a circle is 25 in2. What is the radius, including the units? Area of a circle is ¢³r2. 8)The triangle has an area of 14 in2. Determine the

asked by Julissa on May 20, 2012
81. ## chemistry

The formula for epsom salt is MgSO4 . 7H20 If 1.250 g of the compound is dissolved in water, calculate the number of milliliters of .200 M Ba(NO3)2 that would be required to precipitate all of the sulfate ions as barium sulfate. I got that right with an

asked by kelly on October 10, 2010
82. ## Physics

A 2.40 m length of wire is held in an east-west direction and moves horizontally to the north with a speed of 15.1 m/s. The vertical component of Earth's magnetic field in this region is 40.0 µT directed downward. Calculate the induced emf between the

asked by Stefan on March 21, 2011
83. ## math

The Yankee Clipper leaves the pier at 9:00 am at 8 knots. A half hour later the River Rover leaves the same peir going in the same direction traveling at 10 knots. At what time will the River Rover overtake the Yankee Clipper? Please help me solve this

asked by Shayna on October 4, 2009
84. ## chemistry

How many moles are in 13grams of C6H6. should this question be broken down into its imperical formula (CH)6 and calculate the number of moles of CH and multiply by 6 or calculate the gram molecular wt of C6H6 and divide it into 13 grams? I took 13 grams

asked by richard on January 23, 2010
85. ## Math

Can someone help me with a formula for this? A container ship left the Azores and traveled north. An aircraft carrier left two hours later traveling 5 km/h faster in an effort to catch up to it. After eight hours the aircraft carrier finally caught up.

asked by Peter G. on May 6, 2018
86. ## Area of a figure

|_________16__________| |______10________| ________________ | * | * 4 * | * |________________* |______10________| This is a shape of a rectangle with a triangular point to the right. Width is 4, Length is 10 and 16 when you include the triangular point.

asked by Sheila on December 9, 2016
87. ## Chemestry

The covalent compounds ethyl alcohol and dimethyl ether have the formula C2H6O. However, the alcohol melts at -117.3 degrees C and boils at 78.5 degrees C the ether melts at -138.5 degrees C and boils at -23.7 degrees C. How could differences in forces

asked by Agustin on May 3, 2011
88. ## Chemestry

The covalent compounds ethyl alcohol and dimethyl ether have the formula C2H6O. However, the alcohol melts at -117.3 degrees C and boils at 78.5 degrees C the ether melts at -138.5 degrees C and boils at -23.7 degrees C. How could differences in forces

asked by Agustin on May 3, 2011
89. ## physics

1. The efficiency of a squeaky pulley system is 73 percent. The pulleys are used to raise a mass to a certain height. What force is exerted on the machine if a rope is pulled 18.0 m in order to raise a 58 kg mass a height of 3.0 m? Answer: 13.24 N? A

asked by anonymous on January 17, 2007
90. ## Math

A wooden artifact from an ancient tomb contains 70% of the carbon-14 that is present in living trees. How long ago was the artifact made? (The half-life of carbon-14 is 5730 years. Round your answer to the nearest whole number.) And.... An infectious

asked by Tarah on November 21, 2010
91. ## Physics

A block with mass M rests on a frictionless surface and is connected to a horizontal spring of force constant k, the other end of which is attached to a wall. A second block with mass m rests on top of the first block. The coefficient of static friction

asked by Jon on January 12, 2011
92. ## English

Which of the following sentences has a compound predicate? A. She raced along the path to beat him to the beach. B. While he swam, she collected shells. C. She washed the shells and dried them in the sun. D. She placed the shells in a plastic bag while he

asked by Travis on July 6, 2006
93. ## Chemistry

Sorry for posting this again, I don't know if the question was skipped or not, but I was just wondering if I could get some help on this... thanks. There are 3 known isotopes of Hydrogen and 3 stable isotopes of oxygen. How many types of water molecules

asked by Jessica on April 21, 2007
94. ## Physics

Sorry to be a nag, but I tried it again, and didn't get it. Here's the question... A rectangular solid made of carbon has sides lying along the x, y, and z axes, whose lengths are 1.06 cm, 2.12 cm, and 4.24 cm, respectively. Determine the resistance for

asked by Mel on February 10, 2009
95. ## Math

Find the amount in an account if \$2,000 is invested at 6.125%,compounded semi-annually,for 2 years. A)\$2256.49 B)\$2252.50 C)\$2324.89 D)\$544,757.84 Get yourself a pocket calculator or sharpen your pencil. The new amount will be 2000*(1.030625)^4 The

asked by Sharai on March 13, 2007
96. ## Math

What am I doing wrong? I have followed formula and still my answer is wrong Brenda bought a swimming pooll obtaining an 8 % add on interest installment loan from the bank. The pool cost 2,400, and the bank requires 15% down and qual monthy payments for two

asked by Debbie on November 11, 2008
97. ## algebra

The temperature on a summer day is 77 degrees Fahrenheit. The formula to covert temperature to degrees Celsius is C = 5/9(F-32). What is the corresponding temperature in degrees Celsius?

asked by Tee on September 1, 2013
98. ## Algebra

jose can complete the job in a hours, and Maria can complete the job in b hours. How long does it take them to complete the job when they work together? I need a formula

asked by Brian on April 16, 2009
99. ## College Algerbra

THE TEMPERATURE ON A SUMMER DAY IS // DEGREES FAHRENHEIT.the formula to convert the temperature to degrees Celsius is C = 5/9(F-32) what is the corresponding temperature in degrees Celsius?

asked by Eric on March 24, 2013
100. ## Chemistry

Full question: An alcohol of molecular formula C4H10O2 contains two OH groups and has an unbranched carbon atom chain. On reaction with excess hot potassium permanganate this alcohol is converted into a compound of molecular C4H6O4 To which carbon atoms in

asked by Ariana on August 22, 2014