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Questions (187)

a student connects an object with mass m to a rope with a length r and then rotates the rope around her head parallel to the
1. 0 answers
2. 323 views
a student connects an object with mass m to a rope with a length r and then rotates the rope around her head parallel to the
1. 3 answers
2. 562 views
the period of the orbit of halley's comet is about 75 years. what is the comet's average distance from the sun?if it comes
1. 0 answers
2. 323 views
what is the gravitational field strength of mars measured at a position 400 km above its surface? mars has a mass of 6.39x10^23
1. 1 answer
2. 521 views
which applies a larger force: the gravitational force on Mars by the sun or the gravitational force on the sun by Mars? explain
1. 1 answer
2. 527 views
what is the average gravitational force of attraction between the earth and the sun? the earth averages a distance of about 150
1. 1 answer
2. 588 views
the earth has an average distance of 225 million km (2.25x10^8 km) from Mars. what is the gravitational attraction between Mars
1. 0 answers
2. 489 views
Ok im just here to check my answer for this questiona student places two 100 kg spheres a distance of 0.5 m apart. what is the
1. 2 answers
2. 340 views
titan is the largest moon of Saturn. if a 60 kg person stood on titan, they would have a weight of 81 N.a. what is titan's mass
1. 2 answers
2. 447 views
the earth 's moon has a gravitational field strength of about 1.6 n/kg near its surface. the moon has a mass of 7.35x10^22 kg.
1. 1 answer
2. 642 views
what is the average gravitational force of attraction between the earth and the sun? the earth averages a distance of about 150
1. 1 answer
2. 481 views
The function f has a domain of [0,5]and a range of [0,3]. Start by sketching a potential graph of f.Suppose the function
1. 2 answers
2. 3,384 views
An early major objection to the idea that the earth rotates on its axis was that it would haveto turn so fast that people would
1. 0 answers
2. 452 views
a student places a 10 g coin on a disk at a point 0.02 m from the center of the disk. the student rotates the disk with a
1. 0 answers
2. 281 views
a student attaches a 0.5 kg object to a 0.7 m string and rotates the object around her head and parallel to the ground. how much
1. 1 answer
2. 262 views
An early objection to the idea that the earth is spinning on its axis was that the earth would turn so fast at the equator that
1. 0 answers
2. 416 views
A 1.3-kg model airplane flies in a circular path on the end of a 23-m line. The plane makes4.3 revolutions each minute. a. What
1. 0 answers
2. 319 views
A 1.3-kg model airplane flies in a circular path on the end of a 23-m line. The plane makes 4.3 revolutions each minute.a. What
1. 0 answers
2. 317 views
a 45 kg boy sits on a horse on a carousel 5.0 m from the center of the circle. he makes a revolution every 8.0 s.calculate his
1. 1 answer
2. 806 views
An early major objection to the idea that the earth rotates on its axis was that it would haveto turn so fast that people would
1. 2 answers
2. 1,699 views
The table and the graph both show equivalent ratios. How are they similar? How are they different?
1. 0 answers
2. 433 views
A student applies a 100 n force at an angle 55 degrees above the horizontal to a 20 kg box. The coefficient of static friction
1. 1 answer
2. 298 views
A student applies a 60 n force at an angle of 60 degrees below the horizontal to a 45 kg box. If the coefficient of kinetic
1. 0 answers
2. 354 views
a student applies a 100 n force at an angle 55 degrees above the horizontal to a 20 kg box. The coefficient of static friction
1. 0 answers
2. 294 views
a box is placed on a ramp with an angle of incline of 25 degrees. what coefficient of static friction is required for the box to
1. 0 answers
2. 312 views
what is 10.2 divided by 2 using compatible numbers
1. 0 answers
2. 371 views
Can you assume that any fraction is in simplest form if either the numerator or denominator is a prime number?
1. 1 answer
2. 480 views
An ant is on top of a tree 232323 meters tall, directly above her home, which is 0.30.30, point, 3 meters below the ground.Which
1. 1 answer
2. 772 views
How do i unscramble LCAIRTEPE
1. 2 answers
2. 1,072 views
The table shows the outputs, y, for different inputs, x:Input (x) 1 3 5 7 Output (y) 8 6 5 4 Part A: Do the data in this table
1. 1 answer
2. 1,654 views
The table shows the outputs, y, for different inputs, x:Input (x) 13 5 7 Output (y) 8 6 5 4 Part A: Do the data in this table
1. 1 answer
2. 975 views
I am a seven letter word most people want me. If you have the second third and fourth letter you are sick. The 5th, 6th, and 7th
1. 2 answers
2. 938 views
The soccer team is selling key chains to raise money for the team. They ordered 100 key chains that sell for .25 each. There is
1. 1 answer
2. 2,009 views
Idk the answer to the question please help.Your a good man,Charlie Brown and "Happiness is a charming Charlie Brown at Orlando
1. 3 answers
2. 1,553 views
Which is the electrophilic site in the molecule (CH3)2C=O?A. CH3 carbon B. CH3 hydrogen C. C=O carbon D. C=O oxygen I think the
1. 1 answer
2. 605 views
How many constitutional isomers have the molecular formula C3H6S ?
1. 0 answers
2. 606 views
Rank the following atoms in order of decreasing electronegativity, putting the most electronegative first:F, Ne, O, N, C
1. 1 answer
2. 1,526 views
Is the following correct?"The abysmal absence of food deprived me of energy."
1. 1 answer
2. 437 views
A voltaic cell consists of a Zn/Zn2+ half-cell and a Ni/Ni2+ half-cell at 25 C. The initial concentrations of Ni2+ and Zn2+ are
1. 2 answers
2. 6,240 views
Predict the half-reactions occurring at the anode and the cathode for the electrolysis of aqueous Na2SO4.
1. 1 answer
2. 1,741 views
Determine the minimum concentration of the precipitating agent on the right to cause precipitation of the cation from the
1. 1 answer
2. 4,833 views
What is the solubility of AgCl in 10 M NH3? The Kf of Ag(NH3)2+ from AgCl(s) in aqueous NH3 is 0.0031, which is for the balanced
1. 1 answer
2. 1,087 views
I do not quiet understand what you said. Could you show your work.What is the solubility of AgCl in 10 M NH3? The Kf of
1. 1 answer
2. 721 views
Question 2What is the solubility of AgCl in 10 M NH3? The Kf of Ag(NH3)2+ from AgCl(s) in aqueous NH3 is 0.0031, which is for
1. 1 answer
2. 888 views
I got pH = 5.3A 1.00 L buffer solution is 0.250 M in HC2H3O2 and 0.250 M in NaC2H3O2. Calculate the pH of the solution after the
1. 1 answer
2. 1,113 views
A 1.00 L buffer solution is 0.250 M in HC2H3O2 and 0.250 M in NaC2H3O2. Calculate the pH of the solution after the addition of
1. 1 answer
2. 1,286 views
Calculate the molar solubility of calcium hydroxide in a solution buffered at each pH.a. pH=4 b. pH= 7 c. pH=9
1. 1 answer
2. 3,278 views
Consider the compounds with the generic formula listed and their corresponding molar solubilities in pure water. Which compound
1. 1 answer
2. 1,551 views
Is there an actual value for the buffer capacity of acetic acid?I need to know the actual value, so that I can calculate the
1. 1 answer
2. 526 views
A 500 mL buffer solution is 0.1 M benzoic acid and 0.10 M in sodium benzoate and has an initial pH of 4.19. What is the pH of
1. 1 answer
2. 4,714 views
Arrange the solutions in order of increasing acidity.NaCl, NH4Cl, NaHCO3, NH4CLO2, NaOH
1. 4 answers
2. 8,110 views
Which is correct?The usefulness of learning is considered valuable. OR The learning usefulness is considered valuable.
1. 2 answers
2. 441 views
Like a equilibrium constants, the values of Kw depends on temperature. At body temperature (37 C), Kw= 2.4 x 10^-14.What are the
1. 1 answer
2. 3,670 views
Jay purchased a new leather jacket on sale at a 40% discount. The origanal list price was $320. What wad the amount of the
1. 1 answer
2. 428 views
Determine [H30+], [OH-], and pH.A solution that is 0.655% HNO3 by mass (assume a density of 1.01 g/ mL for the solution).
1. 1 answer
2. 6,026 views
Like a equilibrium constants, the values of Kw depends on temperature. At body temperature (37 C), Kw= 2.4 x 10^-14.What are the
1. 1 answer
2. 598 views
A 25.0 mL sample of 0.125 M pyridine is titrated with 0.100 M HCl.Calculate the pH at 0 mL of added acid.
1. 2 answers
2. 3,104 views
A 100.0 mL sample of 0.05 M NH3 is titrated with 0.10 M HCl. Determine the pH of the solution after the addition of 50.0 mL HCl.
1. 1 answer
2. 972 views
A 40.0 mL sample of 0.100 M HNO2 is titrated with 0.200 M KOH. Calculate the pH at the equivalence point for the titration of
1. 1 answer
2. 1,269 views
A 40.0 mL sample of 0.100 M HNO2 is titrated with 0.200 M KOH. Calculate the pH at the equivalence point for the titration of
1. 3 answers
2. 3,032 views
When titrating 50.0 mL of 0.10 M H2SO4 with 0.10 M NaOH, how many mL of NaOH will you have added to reach the 1st equivalence
1. 1 answer
2. 787 views
A student completes a titration of an unknown diprotic acid. In this experiment, 0.79 g of the acid is dissolved in 250.0 mL of
1. 1 answer
2. 911 views
A student completes a titration of an unknown diprotic acid. In this experiment, 0.79 g of the acid is dissolved in 250.0 mL of
1. 1 answer
2. 1,268 views
When titrating 50.0 mL of 0.10 M H2SO4 with 0.10 M NaOH, how many mL of NaOH will you have added to reach the 1st equivalence
1. 1 answer
2. 732 views
The outside diameter of a pipe is 5 cm. The inside diameter is 4 cm. The pipe is 4 meters long. What is the volume of the
1. 1 answer
2. 824 views
What is the pH of a solution that is 0.150 M in acetic solution and 0.300 M in sodium acetate? The Ka of acetic acid is 1.8 x
1. 1 answer
2. 622 views
Determine [OH-] of a solution that is 0.135 M in CO3^2-.I got 0.00532.
1. 1 answer
2. 948 views
Ammonium hydroxide is commonly advertised as an ingredient in some window cleaners. Rank the following in order of decreasing
1. 1 answer
2. 685 views
The pH scale ranges from 0 to 14. What is the range of the hydronium ion concentration covered by this scale?
1. 1 answer
2. 881 views
Which if the folowin species is not amphoteric?a) H2SO4 b) H2PO4- c) HPO4 2- d) HSO4- e) H2O
1. 4 answers
2. 2,422 views
I got an answer of -1.34 x 10^3 KJ/mol.A 10.00 mL aliquot of 0.100 M NaOH is added to 15.00 mL of 0.100M HCl in a coffee cup
1. 0 answers
2. 674 views
Is the answer for part c 0.91?A 1.0 L ball containing Ar at 5 atm is connected to a 10.0 L ball containing N2 at 2atm.
1. 0 answers
2. 781 views
Where did you get 5E-5.Is this how you set it up? 0.01 x 0.05 = 5E-4 If so, is it supposed to be 5E-4 instead of 5E-5? What is
1. 0 answers
2. 614 views
What is the equilibrium constant for a weak acid HA that dissociates 1% at an initial concentration of 0.05 M according to the
1. 1 answer
2. 467 views
A 10.00 mL aliquot of 0.100 M NaOH is added to 15.00 mL of 0.100M HCl in a coffee cup calorimeter. The initial temperature of
1. 1 answer
2. 553 views
I got 62.9 mL. Is this correct? I think HCl is the LR.A piece of solid magnesium is reacted with hydrochloric acid to form
1. 2 answers
2. 598 views
How many gallons of ethylene glycol, molar mass 62.07 g/mol, density = 1.1 g/mol do you need to add to each gallon of water ( 1
1. 1 answer
2. 633 views
What is the final temperature and physical state if water when 47.50 kJ of energy is added to 15.0 g of ice at -10.0 C?Helpful
1. 1 answer
2. 617 views
A 1.0 L ball containing Ar at 5 atm is connected to a 10.0 L ball containing N2 at 2atm.A)Calculate the partial pressures and
1. 1 answer
2. 695 views
A 1.0 L ball containing Ar at 5 atm is connected to a 10.0 L ball containing N2 at 2atm.A)Calculate the partial pressures and
1. 0 answers
2. 539 views
Predict the effect of decreasing the temperature on the position of thefollowing equilibria. (a) H2(g) + Cl2(g) ↔ 2HCl(g) +
1. 5 answers
2. 3,127 views
Exercise 14.55 Consider the reaction: NiO(s)+CO(g)⇌Ni(s)+CO2(g) Kc=4000.0 at 1500 K When calculating the answer, do not round
1. 4 answers
2. 2,135 views
Exercise 14.55 Consider the reaction: NiO(s)+CO(g)⇌Ni(s)+CO2(g) Kc=4000.0 at 1500 K When calculating the answer, do not round
1. 1 answer
2. 693 views
Exercise 14.55 Consider the reaction: NiO(s)+CO(g)⇌Ni(s)+CO2(g) Kc=4000.0 at 1500 K When calculating the answer, do not round
1. 1 answer
2. 547 views
A 30.5 g sample of an alloy at 94.0°C is placed into 48.7 g water at 20.3°C in an insulated coffee cup. The heat capacity of
1. 6 answers
2. 1,328 views
What is the change in internal energy (in J) of a system that absorbs 0.677 kJ of heat from its surroundings and has 0.438 kcal
1. 0 answers
2. 442 views
1. What is the change in internal energy (in J) of a system that absorbs 0.677 kJ of heat from its surroundings and has 0.438
1. 0 answers
2. 1,348 views

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