Sunday
December 4, 2016

# Posts by JOSEPH

Total # Posts: 545

Chemistry
How many mL of 0.100 M NaOH are required to neutralize (or titrate) 25.0 mL of 0.15 M H3PO4?
December 1, 2016

math
Jenifer jogs at the rate of 3 3/4 miles per hour. How far does she jog in 1 5/6 hours?
November 8, 2016

Chemistry 1
Use the equation Q = mc?T Q =(m)(c)(?T) =(22.0g)(4.184J/g°C)(75°C) =6903.6J =6900J (if you need to round to nearest sig fig) Hope this helps!
November 2, 2016

biology
Quick Answer: "I" Explanation: Since you're forming an iconic bond, you want to get the total valance electrons to 8. Elements under 1A all have 1 valance electron, so all you really need to do is find an element with 7 electrons which under VIIIA column(7th ...
November 2, 2016

physical chemistry
The ice skate of a 210-pound hockey player is in contact with the ice over a 2.5mm x 15cm area. Determine the freezing point of the ice under the blade of the skate?
October 31, 2016

Chemistry
Consider an ionic compound, MX2, composed of generic metal M and generic, gaseous halogen X. The enthalpy of formation of MX2 is ΔHf° = –799 kJ/mol. The enthalpy of sublimation of M is ΔHsub = 157 kJ/mol. The first and second ionization energies of M are IE1...
October 31, 2016

physics
The ice skate of a 210-pound hockey player is in contact with the ice over a 2.5mm x 15cm area. Determine the freezing point of the ice under the blade of the skate?
October 30, 2016

chemistry
The ice skate of a 210-pound hockey player is in contact with the ice over a 2.5mm x 15cm area. Determine the freezing point of the ice under the blade of the skate?
October 30, 2016

physics
Calculate the freezing point of water at a depth of 10.0 cm below the surface of the water. The density of the water is 0.9998 g/cm3.
October 30, 2016

chemistry
Calculate the freezing point of water at a depth of 10.0 cm below the surface of the water. The density of the water is 0.9998 g/cm3.
October 30, 2016

chemistry
For each pair of compounds, predict which species will have the higher molar entropy at 298 K and 1 bar. Be sure to state your reasons for your choice. 1. N2(g) vs. F2(g) 2. ICl (g) vs. BrF(g) 3. 6Li(s) vs. 7Li(s)
October 24, 2016

Calculus
I want to know how to find the local linearization. So in this problem I'm doing, I'm given the f(x) equation and it says "about x = 0" I'm suppose to approximate value of f(0.3) Are there specific steps I need to take to go about this problem?
October 10, 2016

Algebra
Can someone help me with this equation? The length of a rectangle is (2x+3) and the width is (x-6). Write the equation and solve to find the value of x if the perimeter of the rectangle is 90 centimeters.
September 8, 2016

Math
Would it be two? Since HHT and HTH? or HHT, THH, Hth? Thanks
September 4, 2016

Math
Use a tree diagram or systematic list to determine the number of ways a nickel, a dime, and a quarter can be flipped to get exactly one tail.
September 4, 2016

math
The gradient of a curve at (1,-11) is ax^2 + b at all points. The tangent at (2,-16) is parallel to the x-axis. Find a and b and the equation of the curve
June 21, 2016

Math
A class of 23 students was using square tiles to build rectangular shapes. Each student had more than 1 tile and each had a different number of tiles. Each student was able to build only one shape of rectangle. All tiles had to be used to build a rectangle and the rectangle ...
June 20, 2016

Final length of the bar of copper whose original length was 75mm When heated through 50 degrees
June 6, 2016

Co-efficient of cubical expansion
June 6, 2016

Final length of the bar of copper whose original length was 75mm When heated through 50 degrees
June 6, 2016

math
a girl walks 800 m on a bearing of 129 degrees.calculate how far east and south she is from her starting point.
May 16, 2016

math
the brown family boarded a train at 3:55 P.M. to go home from the county fair. it took them 25 minutes to get to the train station from the fair. they spent 75 minutes at the fair. what time did they arrive at the fair
May 4, 2016

math
the volume of a rectangular prism is 2,058 cm3. The length of the prism is three times the width. The height is 14 centimeters. Find the other dimensions
April 13, 2016

math
most unsharpened pencils are hexagonal prisms. describe a vertical and horizontal cross section of a pencil
April 13, 2016

Math
Trying to find the volume of a rectangle. The lenght is 8/9 the wideth is 1/6 and the height is 1/3. And can't seem to solve the problem. Can you please help
April 11, 2016

Math
What is the ratio in fraction form for 9 pints to 2 quarts
April 10, 2016

english
what is the meaning of the Root bell
March 14, 2016

Physics
An object 20cm high is placed 40cm from a lens of focal length 24cm. Calculate: a) The power of the Lens? b) The distance from the lens to the position of the image?
March 7, 2016

Chemistry
An interference filter is to be constructed for isolation of the nitrobenzene absorption band at 1537 cm-1. (a) If it is to be based on first-order interference, what should be the thickness of the dielectric layer (refractive index of 1.34)? (b) What other wavelengths would ...
February 26, 2016

Chemistry
For the gratings (84.0 lines per millimeter and 15.0 mm of illuminated area) calculate the wavelengths on the first and second-order diffraction spectra at reflective angles of (a) 20 degrees and (b) 0 degrees. Assume the angle of incidence is 45 degrees.
February 26, 2016

physics
weights of man 10kg and 8kg are placed near p and q respectively one each end of the beam calculate the Reactions at p and q. [1kg is 10N]
February 21, 2016

physics
a uniform beam 6.0m long and weighing 4kg on support of p and q placed let and right 1.0m from each end of the beam
February 21, 2016

math
find the hidden question. single load cost \$2 and double load cost \$4
February 10, 2016

Math
11 + 2z= 14.78 Find the variable
January 27, 2016

Math
14 + y/8 = 10 What is the variable?
January 27, 2016

Math
d = 31 Thank you Ms. Sue
January 27, 2016

Math
13+d=44 What does the variable represent
January 27, 2016

Math
5/6 (2g+1)-g Simplify the expression
January 27, 2016

Math
Thank you
January 27, 2016

Math
Two even integers are represented by 2n and 2n+2. Explain how you can find the value of those integers if their sum is 14. Name the integers.
January 27, 2016

chemistry (moles)
2.5g of a mixture of anhydrous BaOH and BaCl2 was dissolved in distilled water and made up to 250cm3. 20cm3 of this solution required 19cm3 of 0.1moldm3 of dilute nitric acid for complete reaction. Calculate the percentage by mass of BaCl2 present in the mixture. The answer is...
January 21, 2016

Math
A percentage that represents the yearly increase in prices of things you buy is called
January 15, 2016

MATH
You are asked to calculate the weight that a hotel elevator can safely carry. You should expect your answer to be
January 14, 2016

math
Mr. Dunn drives a 12 mile round trip 3 times a week to the dog park. How many miles does he drive?
January 12, 2016

Math
Exponetial Functions In the following exponential relations, solve for x using logarithms. Round your answers to 4 decimal places. a) 5^3x=65 b) 2^2x+3=80
December 31, 2015

maths physics chemistry
State the principle on which each of the following is based. (a) the equation of continuity, Av = constant (b) the Bernoulli equation
December 29, 2015

Math
If the temperature was -10F and dropped by 16F what would the temperature be?
December 16, 2015

Trigonometry
An automobile tire has a diameter of 36 inches. How many revolution will the wheel make as the automobile travel 1 mile
December 15, 2015

Physics
Bill is moving a crate of mass 35 kg up a ramp that forms a 25 degree angle with the horizontal to a height of 5 m. A) If the ramp is frictionless, how much work must Bill do in pushing the crate to the top? B) How much work does gravity do as Bill pushes the crate up the ramp?
December 13, 2015

Chemistry
At the start of a road trip, the pressure of the air in a car tire is 276kPa and the temperature is 12.0 degrees Celsius. After driving for some time the pressure in the tire is now 303kPa. Assuming that the volume of the air inside the tire remains constant, determine the new...
December 5, 2015

Physics
At the start of a road trip, the pressure of the air in a car tyre is 276kPa and the temperature is 12.0 degrees celsius. After driving for some time the pressure in the tyre is now 303kPa. Assuming that the volume of the air inside the tire remains constant, determine the new...
December 5, 2015

Physics
Assume the gas is diatomic, calculate how much heat was added to the gas in the process. One mole of ideal gas initially at a temperature of Ti=0 Celsius undergoes an expansion at a constant pressure of 1.00 atm four times its orginal volume
November 29, 2015

Math
Thanks. It was 12.5
November 12, 2015

Math
A Gardner adds 3.5 oz of plant food to 2 gallons of water. The amount he was supposed to add is 4 oz. what is the percent error in mixing the plant food
November 12, 2015

Physics
A spaceship of mass 2.1×10^6 kg is cruising at a speed of 5.0×10^6 m/s when the antimatter reactor fails, blowing the ship into three pieces. One section, having a mass of 4.8×10^5 kg , is blown straight backward with a speed of 2.3×10^6 m/s . A second ...
November 11, 2015

Science
Concentrated phosphoric acid is 90% by mass and the remaining mass is water.The molarity of phosphoric acid in 90% is 12.2M at rtp. a)What is the density of the solution at rtp ? b)What volume (in mL)of this solution is needed to make a 1.00L solution of a 1.00M phosphoric ...
November 11, 2015

math
if a bill is \$53.00 tax is 6% and tip is 20% what is the total bill
November 4, 2015

math
if I invest \$5000.00 in an account earning simple interest After 6 years the balance is \$6,200. What is the interest rate
November 4, 2015

Math
If the value of a car decreased by 10 percent and is now worth \$ 21,000. What was the original cost of the car?
October 27, 2015

Math
Thank you Ms Sue. You were a big help
October 27, 2015

Math
Can you show me the formula
October 27, 2015

Math
If a car decreased by 10 percent and is now worth \$14,000. What was the original price of the car
October 27, 2015

stats
The controller for a garage door opener has nine binary switches that can be set to either on or off. How many different total settings can be set on this controller?
October 26, 2015

s v m latehar ( math)
Mean=Sum of observations/total no: of observations here 50 is the mean therefore sum of the observation=50*100 so the sum will be 5000 when the value is changed from 100 to 110....only 10 is increased... therefore sum of observations will be increased by ten.... 5000+10(note:...
October 23, 2015

Physics
Michael Jordan has the record for the highest vertical jump at 48 inches (1.22m). While on the ground, he speeds up over a distance of 0.6 m to achieve the necessary launch speed. What acceleration does his legs provide in order to achieve his height? (Hint: you will need to ...
October 19, 2015

Chemistry
Write a balanced net ionic reaction for the reduction of cupric ion (Cu2+) by hydroxylamine (NH2OH) in acid solution, using the smallest integer coefficients. (Do not include symbols for state of matter in your answer). in order for this to reduce Cu+2 to Cu+, the ...
October 19, 2015

Physics
If the rope pulling on the leg exerts a 120-N force on it, how massive should be the block hanging from the rope that passes over the pulley?
October 16, 2015

math
what is the square root of 288 ?
September 21, 2015

Chemistry
A mixture of ethane and ethene occupied 35.5 L at 1.000 bar and 405 K. This mixture reacted completely with 110.3 g of O2 to produce CO2 and H2O. What was the composition of the original mixture? Assume ideal gas behavior
September 21, 2015

Physics
A projectile of mass 0.413 kg is shot from a cannon, at height 6.8 m, with an initial velocity vi having a horizontal component of 7.5m/s. The projectile rises to a maximum height of ∆y above the end of the cannon’s barrel and strikes the ground a horizontal ...
September 16, 2015

Math
A man travels to work everyday at a speed of 40km/h using a car and 6km/h by walking. He arrives at his workshop in 25mins. One day his car broke down and he walked three times as far, thereby arriving at the workshop 17mins late. Calculate the distance from his house to the ...
September 15, 2015

Physics
Part one was answered, thank you. This was Part one:A runner is jogging at a steady 6.2 km/hr. When the runner is 4.9 km from the ﬁnish line, a bird begins ﬂying from the runner to the ﬁnish line at 24.8 km/hr (4 times as fast as the runner). When the bird...
August 20, 2015

Physics
A runner is jogging at a steady 6.2 km/hr. When the runner is 4.9 km from the finish line, a bird begins flying from the runner to the finish line at 24.8 km/hr (4 times as fast as the runner). When the bird reaches the finish line, it turns around and flies back to the ...
August 20, 2015

Mathes
400000000
August 18, 2015

Regent University
A point charge of 0.5 is brought to a point a in free space. How much work is required to do this?
August 2, 2015

physics
the length of an aluminum is 76.5cm and that of an iron ruler is 80cm at 0¡ãc. at what temperature will the length of the rules become equal
July 20, 2015

uniben/physics
the length of an aluminum is 76.5cm and that of an iron ruler is 80cm at 0¡ãc. at what temperature will the length of the rules become equal
July 20, 2015

prob&stat
Both answers of 0.4735 and 0.3686 are wrong. We got 768 cases, 0.3836, still wrong.
July 12, 2015

science
Net force of 10 newton produces an acceleration of 2mts/sec2 in a body moving over a horizontal surface . What is the mass of the body
July 8, 2015

On number one is some an adjective because it's describing sense? Thank you
July 7, 2015

For number 3 the adjective is three sided and wooden? 4)simple and unusual? 5)unlimited? 6) much and first?
July 7, 2015

Please tell me the adjectives in the following sentences. 1)She was blind and deaf but had some sense of touch. 2)Samuel Howe had helped countless handicapped people at Perkins inst. 3) he used unique three sided wooden letters to teach Laura words 4) others doubted whether ...
July 7, 2015

Chemistry
How energy is needed to vaporize 100 g of ethanol from its boiling point?
June 24, 2015

chemistry
TWO IDENTICAL mano METERS ARE FILLED WITH MERCURY. THE mano METERS ARE PLACED IN A CLOSED PRESSURIZED BOX CONTAINING AIR AT 1,000 TORR PRESSURE. ONE manometer CONTAINS GAS a, AND THE OTHER GAS B. WHAT IS THE DIFFERENCE BETWEEN THE PRESSURES OF THE TWO GASES? THE DENSITY IS 13....
June 2, 2015

CHEMISTRTY
i meant manometer
June 2, 2015

CHEMISTRTY
TWO IDENTICAL NANO METERS ARE FILLED WITH MERCURY. THE NANO METERS ARE PLACED IN A CLOSED PRESSURIZED BOX CONTAINING AIR AT 1,000 TORR PRESSURE. ONE NANO-METER CONTAINS GAS a, AND THE OTHER GAS B. WHAT IS THE DIFFERENCE BETWEEN THE PRESSURES OF THE TWO GASES? THE DENSITY IS 13...
June 2, 2015

CHEMISTRTY
IF CO2 TRAVELS 20.5 CM DOWN A 46.0 CM GLASS TUBE IN 1.3*10^4 AS IN THE GRAHAMS LAW EXPERIMENT, THEN COLLIDES WITH ANOTHER GAS. WHAT IS THE MOLECULAR MASS OF THE SECOND GAS?
June 2, 2015

physics
What fraction of the volume of the ball is below the waterline?
April 28, 2015

Physic
a.) Having decay constant as t=0.693/decay constant. Therefore decay constant=0.693/t (i.e time). Decay constant=0.693/30 =0.02
April 14, 2015

chemistry
An optically active compound A, C6H10O2, when dissolved in NaOH solution, consumed one equivalent of base. On acidification, compound A was slowly regenerated. Treatment of A with LiAlH4 in ether followed by protonolysis gave an optically inactive compound B that reacted with ...
April 10, 2015

Calculus
A rectangular storage container with an open top is to have a volume of k cubic meters. The length of its base is twice its width. The material for the base costs \$6 per square meters and the material for the sides costs \$10 per square meter.
April 9, 2015

chemistry
Calculate ▲U,▲H, ▲S, ▲A and▲G in expanding 1 mole of ideal gas at 25 ° c from 10 to 100 dm cubed. (5marks )
March 21, 2015

chemistry
Distinguish clearly between ▲G for a reaction and ▲S of the same reaction. Which of the two is used to predict whether a reaction is spontaneous? why? (4 marks)
March 21, 2015

Inorganic Chemistry
Which of the following species contain an inversion center? Choose all that apply. SeF6 [IF4]- SnF4 InH3
March 5, 2015

Inorganic Chemistry
Which of the following molecules contain a C3 axis but not a σh plane? AlCl3 SeO3 SbBr3 PCl3
March 5, 2015

Inorganic Chemistry
Which of the following species contain a C4 axis and a σh plane? Choose all that apply. [ICl4]- SiCl4 XeF4 GeH4 [PO4]3
March 5, 2015

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