# Caitlin

Most popular questions and responses by Caitlin-
## math

Eight more than the product of two and a number x xxx.

*asked on May 3, 2018* -
## Chemistry

You have to prepare a pH 3.50 buffer, and you have the following 0.10M solutions available HCOOH, CH3COOH, H3PO4,CHOONa, CH3COONa, and NaH2PO4. a) What solutions would you use? b) How many milliliters of each solution would you use to make approximately 1

*asked on April 21, 2015* -
## Chemistry

A solution contains 2.2×10−4 M Ag+ and 1.3×10−3 M If NaI is added, will AgI(Ksp=8.3×10−17) or PbI2(Ksp=7.9×10−9) precipitate first? I know the answer to this is AgI Specify the concentration of I− needed to begin precipitation.

*asked on December 3, 2017* -
## Chemistry

Which of the subshells in the electron configuration of Hf behave as core orbitals Check all that apply 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d

*asked on October 4, 2011* -
## Chemistry

What do we call the part of the universe that is not part of the system

*asked on October 4, 2011* -
## Chemistry

A line in the Balmer series of hydrogen has a wavelength of 486 nm. From what state did the electron originate? In what region of the electromagnetic spectrum is this line observed?

*asked on October 21, 2015* -
## Math

Check my answers please? There are only 10 The figure below shows a triangle with vertices A and B on a circle and vertex C outside it. Side AC is tangent to the circle. Side BC is a secant intersecting the circle at point X: The figure shows a circle with

*asked on May 22, 2016* -
## Pre-Calculus

A rectangular window is topped with a semicircle. The height of the rectangular part is 1 more than 3 times its width, w meters. Which function represents the total area, A, of the window in terms of the width?

*asked on September 10, 2015* -
## Chemistry

Rank the carbon-carbon bonds in order of decreasing bond length. Rank carbon-carbon bonds from highest bond length to lowest. To rank bonds as equivalent, overlap them. 1,2,3

*asked on October 11, 2011* -
## Chemistry

What is the frequency of radiation that has a wavelength of 13 \mu m, about the size of a bacterium?

*asked on September 22, 2011* -
## Physics

a)What frequency is received by a person watching an oncoming ambulance moving at 120 km/h and emitting a steady 700 Hz sound from its siren? The speed of sound on this day is 345 m/s. b)What frequency does she receive after the ambulance has passed?

*asked on September 3, 2013* -
## Chemistry

Formic acid, HCO2H, is a weak acid. Write a net ionic equation for the reaction of formic acid and aqueous potassium hydroxide.

*asked on October 14, 2009* -
## Chemistry

A meteorological balloon had a radius of 1.1 m when released at sea level at 20◦C. It ex- panded to a radius of 5 m when it had risen to its maximum altitude, where the temperature was −20◦C. What was the pressure inside the balloon at that altitude?

*asked on November 20, 2012* -
## Math

Find two mixed numbers so that the sum is 7 2/4 and the difference is 5

*asked on March 10, 2016* -
## Chemistry

The dipole moment (mu) of HBr (a polar covalent molecule) is 0.851 D (debye), and its percent ionic character is 12.6 %. Estimate the bond length of the H-Br bond in picometers.

*asked on October 7, 2011* -
## science

Water is useful for reducing friction between objects. However you also learned that (due to friction) moving water causes rough rocks to become smooth. How can this be?

*asked on November 3, 2015* -
## chemistry

to clean a clogged drain, 26 g of sodium hydroxide is added to water to make 150 ml of solution what are the pH and pOH values for the solution?

*asked on April 18, 2010* -
## Quantitative Math

A bacteria has a doubling period of 5 days. If there are 3250 bacteria present now, how many will there be in 40 days? I've found the growth rate to be 0.14869, but I can not find the amount of bacteria.

*asked on November 1, 2015* -
## Chemistry

Calculate the heat (in kJ) required to change 40.0g of ice at -30.0 deg C to steam at 150.0 deg C?

*asked on March 6, 2012* -
## Chemistry

If 0.370 g of Ca(OH)2 is added to 500 mL of water and the mixture is allowed to come to equilibrium, will the solution be saturated?

*asked on December 3, 2017* -
## Chemistry

What is the kinetic energy of the emitted electrons when cesium is exposed to UV rays of frequency 1.7×10^{15} Hz?

*asked on September 27, 2011* -
## Math

A rectangle's width is x and its length is 2x-1. Its area is 21. Find its dimensions. my work so far: 21 = x(2x +1) 21 = 2x^2 + x I was wondering how I would continue to solces this problem.

*asked on December 18, 2016* -
## Chemistry

Oxygen can be produced in the laboratory by the reaction 2 KClO3(s) → 2 KCl(s) + 3 O2(g) . How much potassium chlorate is needed to produce 2.75 L of oxygen, collected over water at 37◦C and 94.9 kPa? The vapor pressure of water at 37◦C is 6.28 kPa.

*asked on November 20, 2012* -
## chem really need help!

If a solution containing 33.82 g of mercury(II) acetate is allowed to react completely with a solution containing 9.718 g of sodium sulfate, how many grams of solid precipitate will be formed? How many grams of the reactant in excess will remain after the

*asked on January 17, 2013* -
## Chemistry

How much heat in kJ is lost when 100.0g of steam at 200 deg C is cooled down until it forms ice at -30.0 deg C?

*asked on March 6, 2012* -
## Finance

The Isberg Company just paid a dividend of $0.75 per share, and that dividend is expected to grow at a constant rate of 5.50% per year in the future. The company's beta is 1.25, the market risk premium is 5.00%, and the risk-free rate is 4.00%. What is the

*asked on April 2, 2012* -
## General chemistry

How much energy is released by the combustion of 1.00 mol of octane, C8H18?

*asked on November 7, 2011* -
## Chemistry

Predict the formal bond angles about the central atom for the following molecules: TeBr4 Express your answers using three significant figures separated by a comma. What are the bond angles for an octahedral structure and how many?

*asked on October 28, 2011* -
## Marketing2

What type of channel conflict is likely to be caused by dual distribution, and what type of conflict can be reduced by direct distribution? Why? Channel conflicts: VERTICAL- occurs between different levels in a marketing channel; for example, between a

*asked on July 29, 2008* -
## Chemistry

The bond in O2 is shorter than the O-O bond in compounds that contain an O-O single bond. Explain this observation.

*asked on October 7, 2011* -
## grammar

What is the correct sentence pattern for...I hereby declare Tuesday Shakespeare Day. OPTIONS: Question patternS-V-DOS-LV-PNS-VS-LV-PAS-V-IO-DOE-V-SS-V-DO-OC

*asked on August 22, 2012* -
## Physics

A 2.0 mm diameter copper ball is charged to +42 nC. What fraction of its electrons have been removed? The density of copper is 8,920 kg/m3

*asked on October 1, 2013* -
## science

A soccer ball is kicked with an initial speed of 8.4 m/s in a direction 22.0° above the horizontal.Find the magnitude and direction of its velocity at the following times. (Take the +x axis to be parallel to the ground, in the direction that the ball is

*asked on August 10, 2012* -
## College Algebra

The height of a box is 3cm less than the width. The length is 2cm less than the width. The volume is 50cm^3. what is the width of the box?

*asked on April 2, 2012* -
## chem please help!

If a solution containing 33.82 g of mercury(II) acetate is allowed to react completely with a solution containing 9.718 g of sodium sulfate, how many grams of solid precipitate will be formed? How many grams of the reactant in excess will remain after the

*asked on January 17, 2013* -
## Chemistry

If a solution containing 33.82 g of mercury(II) acetate is allowed to react completely with a solution containing 9.718 g of sodium sulfate, how many grams of solid precipitate will be formed? How many grams of the reactant in excess will remain after the

*asked on January 17, 2013* -
## Marketing

As a novice in global marketing, which alternative for global market-entry strategy would you be likely to start with? Why? What other alternatives do you have for a global market entry? (Marketing: The Core, 2nd ed.) It appears as though the choices from

*asked on July 29, 2008* -
## please help!!

*asked on January 17, 2013* -
## basic chem

*asked on January 17, 2013* -
## physics

Two strings are adjusted to vibrate at exactly 224 Hz. Then the tension in one string is increased slightly. Afterward, three beats per second are heard when the strings vibrate at the same time. What is the new frequency of the string that was tightened?

*asked on August 7, 2012* -
## Science 10

A person hits a 45-g golf ball. The ball comes down on a tree root and bounces straight up with an initial speed of 14.0 m/s. Determine the height the ball will rise after the bounce The equation is height= 1/2 velocity^2 / g where g is 9.8m/s^2

*asked on July 16, 2007* -
## math

The number of customers that visit a local small business is 37,800 and has been continuously declining at a rate of 1.7% each year. What is the approximate number of customers that visit the business in 12 years?

*asked on July 28, 2013* -
## Science

Zn + 2HCl - ZnCl2 + H2 Assuming the acid was in excess (so all of the zinc reacts), how many mols of hydrogen would you produce?

*asked on March 9, 2015* -
## Math

A chain saw requires 7 hours of assembly and a wood chipper 3 hours. A maximum of 63 hours of assembly time is available. The profit of $190 on a chain saw and $220 on a chipper. How many of each should be assembled for maximum profit?

*asked on March 6, 2016* -
## college physics

A man pushing a mop across a floor causes it to undergo two displacements. The first has a magnitude of 140 cm and makes an angle of 130° with the positive x axis. The resultant displacement has a magnitude of 144 cm and is directed at an angle of 30.0°

*asked on September 28, 2010* -
## calculus

The base of a solid consists of the region bounded by the parabola y=rootx, the line x=1 and the x-axis. Each cross section perpendicular to the base and the x-axis is a square. Find the volume of the solid.

*asked on June 6, 2012* -
## Calc

The arc of the parabola y=x^2 from (1,1) to (2,4) is rotated about the y-axis. Find the area of the resulting surface.

*asked on June 6, 2012* -
## Chemistry

The tomato is dropped. What is the velocity, v, of the tomato when it hits the ground? Assume 94.7% of the work done in Part A is transferred to kinetic energy, E, by the time the tomato hits the ground.

*asked on December 7, 2014* -
## Calculus

Here is my problem that I am trying to work on: A rock is dropped from the top of a 300-ft cliff. It's velocity at time t seconds is v(t0= -32 t feet per second. a.) Find the height of the rock above the ground at time t. b.) How long will the rock take to

*asked on May 11, 2009* -
## Science

If A tank with a flat bottom is filled with water to a height of four meters. what is the pressure at any point at the bottom of the tank? my teacher wants me to ignore atmospheric pressure when calculating my answer A. 3.5 kPa B. 3,500 kPa C. 34.3 kPa D.

*asked on May 7, 2013* -
## Chemistry

A sample of oxygen is collected in a 387 mL container over water at 15◦C, and the barom- eter reads 738 torr. What volume would the dry gas occupy at 781 torr and 15◦C? Water’s partial pressure at 15◦C is 12.8 torr. Answer in units of mL

*asked on November 20, 2012* -
## physics

(a) Calculate the mass flow rate (in grams per second) of blood (ρ = 1.0 g/cm3) in an aorta with a cross-sectional area of 2.0 cm2 if the flow speed is 33 cm/s. Answer is in g/s (b) Assume that the aorta branches to form a large number of capillaries with

*asked on October 27, 2011* -
## Physics

A sample of an unknown material appears to weigh 275 N in air and 160 N when immersed in alcohol of specific gravity 0.700. What is the volume of the material? What is the density of the material?

*asked on October 28, 2013* -
## physics

A car starts from rest and travels for 5.0 seconds with a uniform acceleration of +1.5 m/s^2. The driver then applies the brakes, causing a uniform acceleration of -2.0 m/s^2. If the brakes are applied for 3.0 seconds, how fast is the car going at the end

*asked on September 19, 2010* -
## Physics

A golf club is swung with an average angular acceleration of 1.7 rad/s^2. If thee time from start of the swing until the club hits the ball is .7 s, what is the angular velocity of the club when it strikes the ball?

*asked on November 7, 2013* -
## Finance

Scanlon Inc.'s CFO hired you as a consultant to help her estimate the cost of capital. You have been provided with the following data: rRF = 4.10%; RPM = 5.25%; and b = 1.15. Based on the CAPM approach, what is the cost of equity from retained earnings?

*asked on April 2, 2012* -
## Physics

A person climbs from a Paris metro station to the street level by walking up a stalled escalator in 96.5 s. It takes 60.0 s to ride the same distance when standing on the escalator when it is operating normally. How long would it take for him to climb from

*asked on September 20, 2012* -
## Chemistry

Calculate the average mass (in amu) of 1 methane molecule (to .01 amu)

*asked on November 1, 2011* -
## MATH-HELP ASAP

Joline collects hockey cards. She needs 5 cards to complete a set. This is 20 percent of the set. How many cards are in the set? and how do you figure this out ? please help:(

*asked on June 15, 2010* -
## Chemistry

Use van der Waals’ equation to calculate the pressure exerted by 2.33 mol of ammo- nia at −3.7◦C in a 1.25 L container. The van der Waals’ constants for ammonia are a = 4.00 L2·atm/mol2 and b = 0.0400 L/mol. (The values for a and b have been

*asked on November 20, 2012* -
## Intergrated Math

Use the definitions and theorems of this section to evaluate and simplify the following expression. Be sure to express answers with positive exponents. (b ^4)^ 2

*asked on December 29, 2011* -
## dress making

1. Which one of the following is the most complete and accurate definition of fiber? A. A stringy substance from plants B. The hair of an animal C. Man-made threads and yarns D. Basic raw material from which fabric is made 2. An example of a natural fiber

*asked on January 25, 2013* -
## physics

A ball is thrown from a point 1.38 m above the ground. The initial velocity is 19.9 m/s at an angle of 33.8° above the horizontal. Find the maximum height of the ball above the ground. Calculate the speed of the ball at the highest point in the

*asked on September 23, 2012* -
## science

Is vinegar a heterogeneous or homogeneous mixture?

*asked on September 17, 2008* -
## Introduction programing visual basic

break even analysis. suppose a certain product sells for a dollars per unit. then the revenue from selling x units of the product is ax dollars if the cost of producting each unit of the product is b dollars and the company has overhead cost of c dollars

*asked on March 4, 2015* -
## physics

A sample of an unknown material appears to weigh 285 N in air and 165 N when immersed in alcohol of specific gravity 0.700. (a) What is the volume of the material? Answer is in m3 (b) What is the density of the material? Answer is in kg/m3

*asked on October 27, 2011* -
## Chemistry

Describe what a chemical bond is in terms of electron density between two atoms. What are the bond angles for an octahedral structure and how many? Predict the formal bond angles about the central atom for the following molecules: TeBr4 Express your

*asked on October 28, 2011* -
## Chemistry

A monoprotic acid of 0.065 M concentration has a pH of 2. 75. Is this a strong or weak acid?

*asked on April 23, 2015* -
## Physics

The asteroid belt circles the sun between the orbits of Mars and Jupiter. One asteroid has a period of 10 Earth years. a) What is the asteroid's orbital radius? b)What is the asteroid's orbital speed?

*asked on October 23, 2012* -
## Chemistry

At 25 degrees Celsius, the base ionization constant for NH3 is 1.8 x ^-5. Determine the percentage ionization of a M solution of ammonia at 25 degree Celsius.

*asked on March 18, 2012* -
## Marketing3

Develop a chart to highlight the role of each of the four main elements of the retailing mix across the four stages of the retail life cycle. Retail life cycle (see google images) Retailing mix: Bottom: Retail pricing, Store location, Retail communication,

*asked on July 29, 2008* -
## dress making

im pretty sure im right on most the question, just wanna make sure before i submit!! help Mrs. Shotto was once one of your regular customers, but she hasn't asked to have any garments made in approximately one year. You note she has lost weight. She would

*asked on January 28, 2013* -
## Math 10

A cylinder has a surface area of 250cm2. The height is twice as big as the radius. What is the height of the cylinder?

*asked on May 21, 2012* -
## math

You are going to toss 2 pennies 20 times. Make a prediction. how many times do you think the 2 pennies will come up as: 2 heads: 2 tails: 1 head, 1 tail:

*asked on March 19, 2008* -
## mathematicas

how do i do my homework quickly like a ninja but thoroughly??

*asked on March 14, 2011* -
## Life Science

two organisms were found to have different genotypes but the same phenotype. Predict what these phenotypes might be? and Explain

*asked on November 17, 2010* -
## Physics

Consider the diagram of the box and bucket. If the coefficient of static friction is 0.5 and the coefficient of kinetic friction is 0.3, find the maximum mass of the bucket in order for the system to be in static equilibrium. If the block was given a

*asked on January 1, 2011* -
## Math

Please help me solve this.. It costs $10 plus $8 per hour to rent a canoe. Brandon and Erin have $50. Solve the following equation to find how many hours they can rent a canoe. 8h +10 = 50

*asked on November 3, 2010* -
## physics

how do I calculate mass of one object in an elastic collision? I have the equation m1v1 initial + m2v2 initial = m1v1 final + m2v2 final How do I rearrange this to solve for m2?

*asked on June 15, 2010* -
## Calculus

well i have this homework question that says: A rock is dropped from the top of a 300-ft cliff. It's velocity at time t seconds is v(t0= -32 t feet per second. a.) Find the height of the rock above the ground at time t. b.) How long will the rock take to

*asked on May 11, 2009* -
## Chemistry

The heat lost or gained by a system is related to its temperature change by a property called its heat capacity. The molar heat capacity of metals at or above room temperature equals 24.92 J K-1mol-1. The temperature of a block of copper metal (molar mass

*asked on February 6, 2013* -
## Calc

A closed box with a square base is to be constructed so that its volume is 324 cubed feet. The material for the top and bottom cost is $3 per square foot, and that for the sides $2 per square foot. Find the dimensions of the box so that the cost will be

*asked on June 5, 2012* -
## Chemistry

What is the frequency of radiation that has a wavelength of 13 \mu m, about the size of a bacterium?

*asked on September 22, 2011* -
## alegerba

In the expression 90+5z, the coefficient is

*asked on April 15, 2014* -
## Physics

A particle's constant acceleration is north at 108 m/s2. At t = 0, its velocity vector is 61.7 m/s east. At what time will the magnitude of the velocity be 102 m/s?

*asked on September 20, 2012* -
## Physics

A horizontal spring attached to a wall has a force constant of 780 N/m. A block of mass 1.70 kg is attached to the spring and oscillates freely on a horizontal, frictionless surface as in the figure below. The initial goal of this problem is to find the

*asked on September 27, 2011* -
## Math

A ten-pin bowling ball has a volume of about 5274 cm3. A candlepin (8) bowling ball has a volume of about 48 in3. About how much greater is the volume of a ten-pin bowling ball than the volume of a candlepin bowling ball?

*asked on September 25, 2011* -
## Chemistry

Use Equation 7.1 and assuming that core electrons contribute 1.00 and valence electrons contribute nothing to the screening constant, S, calculate Zeff} for these two ions. Express your answers as integers. Enter your answers numerically separated by a

*asked on September 17, 2011* -
## American History

This is what my teacher wrote up on the board today and i was needing some help with it i don't really understand it all... This is exactly what he wrote: In a page-long essay describe how we got Texas Include: Stephen Austin, Zachary Taylor, Manifest

*asked on April 14, 2011* -
## ela

Below the main level, we have a large playroom. What part of speech is below?

*asked on September 26, 2010* -
## 4th grade math

I don't know how to go about solving this problem: There were 93 students going to camp. After equal groups of fewer than 10 students were formed for hiking. 2 students were left over . How many equal groups were formed? Thanks!

*asked on January 7, 2010* -
## math

what is 4/9 reduced???

*asked on July 8, 2008* -
## Introduction programing visual basic

break even analysis. suppose a certain product sells for a dollars per unit. then the revenue from selling x units of the product is ax dollars if the cost of producting each unit of the product is b dollars and the company has overhead cost of c dollars

*asked on March 4, 2015* -
## Physics

Calculate the force of gravitational attraction between two spheres of mass 10.1kg and 45.2 kg that are 38.5m apart.

*asked on November 7, 2013* -
## Physics

Calculate the force of gravitational attraction between two spheres of mass 10.1kg and 45.2 kg that are 38.5m apart.

*asked on November 7, 2013* -
## science

According to the principle of superposition, in a stack of undisturbed sedimentary rocks, the oldest rocks are _____. Gaps in rock layers are called ____. Which of the following is not a type of unconformity?

*asked on November 16, 2012* -
## algebra

Which situation would most likely be represented by a negative correlation: hours of practice and your golf score, hours of practice and the number of baskets you make in basketball, or hours of practice and the cost of a computer? Hint: In golf, the lower

*asked on March 19, 2012* -
## chemistry

300.0 g of ammonia react with 36.0 moles of sulfuric acid to produce ammonium sulfate. How many moles of excess sulfuric acid are left over after the reaction is complete?

*asked on March 16, 2011* -
## Physics

A 66.0 kg base runner begins his slide into second base when moving at a speed of 4.4 m/s. The coefficient of friction between his clothes and Earth is 0.70. He slides so that his speed is zero just as he reaches the base. (a) How much mechanical energy is

*asked on October 25, 2014* -
## Chemistry

Explain why it is necessary to form a double bond in the Lewis structure.

*asked on October 7, 2011*

## Pages

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