# A 50/50 blend of engine coolant and water (by volume) is usually used in an automobile\'s engine cooling system. If your car\'s cooling system holds 4.00 gallons, what is the boiling point of the solution?

42,818 results, page 64-
## Chemistry

What volume of oxygen gas is needed to react completely with 0.677 L of carbon monoxide gas (CO) to form gaseous carbon dioxide? Assume all volume measurements are made at the same temperature and pressure. Thanks in advance for all help!!

*asked by Ally on March 9, 2015* -
## calculus

A conical drinking cup is made from a circular piece of paper of radius R inches by cutting out a sector and joining the edges CA and CB. Find the radius, height and volume of the cone of greatest volume that can be made this way

*asked by Linda on April 9, 2015* -
## Geometry

I would greatly appreciate any help I can get with this problem. I need to find the volume of a right triangular prism. The sides of the triangles measure 2cm and the length of the prism is 10cm. I found the surface area to be 64sq cm...is this correct?

*asked by Nicole on February 24, 2010* -
## Pre Cal

An open box is formed from an 80cm by 80cm peice of metal by cutting four identical squares from the corners and folding up the sides. Express the volume of the box in terms of x. Then describe how you could find the maximum possible volume.

*asked by Jen on January 9, 2010* -
## calculus

A conical drinking cup is made from a circular piece of paper of radius R inches by cutting out a sector and joining the edges CA and CB. Find the radius, height and volume of the cone of greatest volume that can be made this way.

*asked by Linda on April 9, 2015* -
## Chemistry

A person accidentally swallows a drop of liquid oxygen, O2 (l), which has a density of 1.149 g/mL. Assuming the drop has a volume of 0.050 mL, what volume (mL) of gas will be produced in the person’s stomach at body temperature (37 °C) and a pressure of

*asked by Anonymous on November 20, 2017* -
## Gen Chem 2

The air within a piston equipped with a cylinder absorbs 555 J of heat and expands from an initial volume of 0.12 L to a final volume of 0.87 L against an external pressure of 1.0 atm. What is the change in internal energy of the air within the piston in

*asked by Jessica on March 6, 2008* -
## calc (plz, with steps and explanations)

A conical drinking cup is made from a circular piece of paper of radius R inches by cutting out a sector and joining the edges CA and CB. Find the radius, height and volume of the cone of greatest volume that can be made this way

*asked by Linda on April 9, 2015* -
## Chemistry

The air was in a cylinder equipped with the piston absorbs 565 duels of heat and expands from an initial volume of .10 l to a final volume of .85 L against an external pressure of 1.0 ATM what is the change an internal energy of the air within the cylinder

*asked by Daisy on November 4, 2015* -
## math (explanation and answer)

A conical drinking cup is made from a circular piece of paper of radius R inches by cutting out a sector and joining the edges CA and CB. Find the radius, height and volume of the cone of greatest volume that can be made this way

*asked by Linda on April 9, 2015* -
## chemistry

When a reaction mixture with a total volume of 1750 mL that is 0.0263 M aqueous K+ was stoichiometrically produced as per the balanced equation, what volume (mL) of 0.0326 M aqueous K3PO4 was required? 3 BaBr2(aq) + 2 K3PO4(aq) → Ba3(PO4)2(s) + 6 KBr(aq)

*asked by eng on April 3, 2010* -
## Calculus

Air expands adiabatically in accordance with the law PV^1.4=Const. If at a given time the volume is 14 cubic feet and the pressure is 40 pounds per square inch, at what rate is the pressure changing when the volume is decreasing 1 cubic foot per second?

*asked by Alexa on May 1, 2016* -
## Math

An automobile assembly runs for 9 3/4 hours each day. Workers work 3/4 hours shifts. How many shifts are in each day? i put 9 3/4 divided by 3/4. But that's a decimal then i tried 3/4 divided by 3/4 but thats worse. Help me please.

*asked by JadaBrooks on November 21, 2016* -
## Math

Let Pn=0,1,2....be the probability that an automobile policyholder will file for n claims in a five-year period. The Actuary involved make the assumption that Pn+1=(1/4)Pn. What is the probability that the holder will file two or more claims during this

*asked by Roxy on March 16, 2011* -
## Statistics

Can someone please help me with this example, I do not understand it at all. Binomial problems: Advanced A machine that manufactures automobile parts is estimated to produce defective parts % of the time. If this estimate is correct, and parts produced by

*asked by Christi on May 26, 2010* -
## Resources and references

When conducting research on the Internet. What is starting point for determining how to start the research? A: How many times I will need to revise a report? B: Do you want to use a search engine or search directory? C: Do I want an opinion about this

*asked by Sofiya on June 27, 2013* -
## Math

Engine failure forced Robbin to pilot her Cessna150 to an emergency landing. TO land, Robbin's plane glided 17,000 ft over a 15,000-fot stretch of deserted highway. From what altitude did the descent begin?

*asked by Wanda on July 22, 2012* -
## Physics

A rocket car had a mass of 1650kg. The engine expels 140kg of combustion products in 7s. The expelled material has a velocity of 850m/s to the south. Calculate the velocity of the car at the end of 7s. ANSWER: 72m/s to the north

*asked by Sarah on May 10, 2012* -
## English

Question 11 He brought home a new car - large, fire-engine red, fast, and which he could not afford. unclear pronoun reference lack of parallelism mixed metaphor simile my answer c. mixed metaphor

*asked by christopher on April 21, 2010* -
## Chemistry

Hi there - My labs and lectures aren't in synch at the moment so we are now doing a prelab that is asking for info I haven't been taught yet uggg... The prelab question I'm having trouble with is as follows: What is the volume at STP for 0.415 g of argon

*asked by Help on October 29, 2011* -
## MATH

A sphere has five times the volume of a right cone that has a radius of 4.6 cm and a height of 7.7 cm. Determine the radius of the sphere to the tenth of a centimetre. This question is multiple choice and these were the options: A. 2.2cm B. 3.4cm C. 5.9cm

*asked by Anonymous on October 5, 2010* -
## chemestry

if we did this experiment in a refrigerator (4 C) would you expect that the volume of collected gas be greater than or less than the volume of gas you collected today at room temperature?

*asked by Anonymous on March 18, 2016* -
## algebra

what is the volume of a sphere with radius r is given by the formula v=4/3 r^3 Find the volume of sphere with radius 4 meters. use 3.14 for the value of x and round your answer to the nearest tenth.

*asked by Angela on November 16, 2011* -
## Physics..

A container of gas is at a pressure of 1.3x10^5 Pa and a volume of 6.0m^3. How much work is done by the gas if it expands at constant pressure to twice its initial volume? Please help me I really don't know what to do,,,

*asked by cheesecake:) on December 11, 2013* -
## chemistry

the volume of a gas measured at 27 c and 101.3 kpa is 20.0 dm3 what final temperature would be required to increase the volume too 40.0 at 101 kpa

*asked by ibrahim on November 6, 2015* -
## general science

calculate the density of a cork of mass 24g and volume 100 cm3. what would its density be if its volume increases to 200 cm3?

*asked by suevasha on April 18, 2012* -
## physics

An air bubble at the bottom of a lake 35.0 m deep has a volume of 1.88 cm^3. If the temperature at the bottom is 5.4 C and at the top 19.5 C, what is the volume of the bubble just before it reaches the surface?

*asked by Nicholas on September 5, 2008* -
## chemistry

If a hot air balloon has an initial volume of 1000 L at 70∘C, what is the temperature (in ∘C) of the air inside the balloon if the volume expands to 1900L ?

*asked by Anonymous on July 15, 2013* -
## chemistry

At a pressure of 405 kPa, the volume of a gas is 6.00 cm3. Assuming the temperature remains constant, at what pressure will the new volume be 4.00 cm3?

*asked by sara on February 24, 2011* -
## math

To find the volume of a box, you can multiply its height, length, and width. The measure of the volume of a box is 357. Find its possible dimensions.

*asked by gabi on September 7, 2010* -
## Chemistry

At 27 degrees celcius, nitrogen has a volume of 650 cm^3 under a pressure of 980 mmHg. What would be its volume at the same temperature but at a pressure of 760 mmHg?

*asked by Richaj on September 15, 2014* -
## chemistry

A 1.00 L volume of helium gas is cooled from 50.0 degrees celcius to 25.0 degrees celcius. If the pressure remains constant, what is the final volume?

*asked by annie on April 19, 2010* -
## solid geometry

A cone circumscribed a sphere and has its slant height equal to the diameter of its base. Show that the volume of the cone is 9/4 the volume of the sphere.

*asked by defensivepoison on November 16, 2016* -
## math

if a cylinder with a height equal to its diameter has a volume of 20 cubic inches. How can you fine the volume of a sphere whose radius is equal to that of a cylinder

*asked by julie on March 8, 2013* -
## chemistry

if we did this experiment in a refrigerator (4 C) would you expect that the volume of collected gas be greater than or less than the volume of gas you collected today at room temperature?

*asked by Anonymous on March 18, 2016* -
## chem

A sample of gas has an initial volume of 32.6L at a pressure of 1.2atm.If the sample is compressed to a volume of 13.4L , what will its pressure be? (Assume constant temperature.)

*asked by kristine on October 7, 2013* -
## chemistry help

A gas has a volume of 4.40L at 0∘C. What final temperature, in degrees Celsius, is needed to change the volume of the gas to each of the following, if P and n do not change? 1400mL

*asked by Anonymous on July 18, 2013* -
## chemistry

A sample of gas has an initial volume of 20.9 L at a pressure of 1.4 atm If the sample is compressed to a volume of 12.9 L: , what will its pressure be? (Assume constant temperature.) Thank you

*asked by ap on June 19, 2015* -
## Chemistry :((((

a gas occupies a volume of 5L at a temp. of 20C and a pressure of 1atm. what volume would it occupy at a temp. of 30C and a pressure of 1.1 atm.

*asked by Amanda on April 13, 2012* -
## Chemistry

When a sample of neon with a volume of 683 mL and a pressure of 0.792 atm was heated from 19.0 to 76.0 °C, its volume became 733 mL. What was its final pressure (in atm)?

*asked by Luke on July 8, 2014* -
## Chemistry

A balloon that has a temperature of 12C and a volume of 10.0Lt has its temperature raised to 150C. Assuming a constant pressure, what will the new volume of balloon be?

*asked by Linda on May 14, 2012* -
## chem

At a pressure of 2 atm, hydrogen gas occupies a volume of 8 L. What pressure must the gas be under if the volume is increased to 10 L? Don't forget the units.

*asked by vonsha on May 10, 2013* -
## chemistry

A gas sample with a volume of 5.3L has a pressure of 745mmHg at 33degrees C.What is the pressure of the sample if the volume remains at 5.3L but the temperature rises to 79degres C?

*asked by houston on April 28, 2012* -
## Chemistry

if a gas is initially at 1.5 atm of pressure, Occupies a volume of 3.0 L at a tmepeature of 293K, what will be the new volume if the pressure increases to 2.5 atm and is now at 303K?

*asked by Dustin on February 25, 2013* -
## Chemistry

A balloon filled with helium has a volume of 1.oo x 10^3 L at 20 degrees c. What will be the balloons volume at 30 degrees c, if the pressure surrounding the balloon remains constant?

*asked by Lisa on September 23, 2010* -
## Chemistry

A sample of methane gas that has a volume of 4.0L at 15 degrees Celsius is heated to 75 degrees Celsius at constant pressure. Calculate the new volume.

*asked by Megs on May 22, 2012* -
## Chemistry 105

A sample of gas has an initial volume of 33.0 L at a pressure of 1.1 atm. If the sample is compressed to a volume of 10.0 L, what will its pressure be? (Assume constant temperature.)

*asked by JULIE on October 23, 2011* -
## chemistry

a gas has a volume of 95 mL at a pressure of 930 torr. What volume will the gas occupy at standard temperature if pressure is held constant?

*asked by Mikhail on January 26, 2014* -
## chemistry

what is the final temperature of amixture containning 25 grams of ice at -20 degree celciusadded to water at room temperature 22oC mass of water is 50g followed the steps given by you but not getting the answer (0degree celsius) ice at -20 to ice at 0

*asked by treasa on May 13, 2014* -
## English

1. The water in the glass is fresh. 2. The water of the glass is fresh. [which preposition should we use?] 3. He is swimming in the water. 4. He is swimming in the river. 5. He is swimming in the sea. 6. He is swimming in the lake. 7. He is swimming in

*asked by rfvv on October 19, 2017* -
## Chemistry ...ASAP please

a ferric phosphate solution is prepared by adding 2.4 g of ferric phosphate to a volumetric flask and bringing the final volume to 1.00L by adding water having a phosphate concentration of 1.0 mg/L. what is the concentration of soluble iron in this

*asked by medina on January 23, 2011* -
## physics

A closed container with a volume of 8000cm^3 is filled with Xenon gas. the temperature is 273K and the pressure is 2 atm. How many moles of Xenon are in the container? The container is now submerged in boiling water until the gas inside the container is at

*asked by Hil on December 23, 2013* -
## chemistry

a ferric phosphate solution is prepared by adding 2.4 g of ferric phosphate to a volumetric flask and bringing the final volume to 1.00L by adding water having a phosphate concentration of 1.0 mg/L. what is the concentration of soluble iron in this

*asked by Anonymous on January 23, 2011* -
## 8th grade science

I only have one way that the Man-o-War defends them self, their stingers. I need one more way. But my search engine only provides that way. :( Also when the Man-o-war gives birth this happens asexually. but i also need to answer the question how do the man

*asked by Lina on January 5, 2011* -
## Chem

During which stroke of a four-stroke internal combustion engine is the system's temperature raised because work is done to the gases? A. Compression stroke B. Power stroke C. Exhaust stroke D. Intake stroke

*asked by Jessie on August 18, 2016* -
## physics

An airplane of mass 1.30 104 kg is moving at 52.0 m/s. The pilot then increases the engine's thrust to 7.00 104 N. The resistive force exerted by air on the airplane has a magnitude of 3.00 104 N.

*asked by kc on November 25, 2014* -
## physics

a pump fills a tank of capacity 300 m^3 in 5 hours.the tank is situated at a height of 20 m.if the efficiency of the tank is 65%. then calculate the power of the engine which has driven the pump.

*asked by Anonymous on September 10, 2014* -
## college chem

A researcher explores the ideal gas equation. He measures the pressure of a system at different temperatures ( keeping the volume and moles of the gas constant) and creates a plot of P versus T. What is the slope of the line that results if the volume is

*asked by k on February 1, 2013* -
## Precalculus

"An aquarium with length x, width x-10, and height x-5 holds about 750 cubic feet of water. Find all real solutions of the equation (I wrote it) 750 = x(x-10)(x-5)." I got the volume equation correct, right? I've tried dividing the factors of -750 by the

*asked by Emily on September 17, 2009* -
## Chemistry

How will the volume of a fixed sample of gas change if its pressure is doubled and the Kelvin temperature is doubled? a)the change cannot be determined without more specific information b)it will decrease by a factor of 2 c)it will increase by a factor of

*asked by Shawn G. on November 6, 2009* -
## Chemistry

If air is 20% oxygen, and the reaction is 2C2H2 + 5O2 --> 4CO2 + 2H2O, What volume of oxygen would be needed to completely burn 1.00 L of acetylene (C2H2)? I got 2.50 L but I'm not sure it's right. What volume of air would be needed to completely burn 1.00

*asked by anonymous on May 27, 2015* -
## CHEMISTRY PLEASE HELP

Using the data collected for part c on your data sheet and assuming the density of the vinegar is 1.00g/mL, 1) calculate the molar concentration of acetic acid (CH3COOH) in the vinegar sample using the average volume of NaOH. 2) calculate the mass percent

*asked by Josh on October 25, 2011* -
## Chemistry

Using the data collected for part c on your data sheet and assuming the density of the vinegar is 1.00g/mL, 1) calculate the molar concentration of acetic acid (CH3COOH) in the vinegar sample using the average volume of NaOH. 2) calculate the mass percent

*asked by Josh on October 24, 2011* -
## Physics

A cylindrical container 1.5m tall contains mercury to a certain depth, d. The rest of the cylinder is filled with water. If the pressure at the bottom of the cylinder is two atmospheres, what is the depth d? I used this equation: 2atm = 1atm + (density of

*asked by Lhaedy on December 11, 2013* -
## chemistry

ho do you calculate final temperature? anyone please help thanks that's a little vague. Are you dealing with ideal gases? If so you would use the formula PV=nRT P = pressure V = volume of container n = moles (grams/molar mass) R = gas constant (0.0821) T =

*asked by shannon on March 15, 2007* -
## Stats

Recently, an automobile insurance company performed a study of a random sample of 15 of its customers to determine if there is a positive relationship between the number of miles driven and the age of the driver. The sample correlation coefficient is

*asked by Breezy on June 13, 2011* -
## chemistry

Some distilled water is added to an empty beaker. A gram of copper(II) nitrate is added to the beaker with stirring. After a few minutes, what is in the beaker? a. solid copper(II) nitrate and water b. nitrogen gas, copper atoms, electrons, and water c. a

*asked by john on January 29, 2011* -
## Science

I have two questions and I have answers for them and I don't know if there right or not. The ones that have stars by the answers is the answers I picked. 1. Complete this sentence. If volume remains the same while the mass of a substance ________, the

*asked by Dan on August 22, 2017* -
## CHEMISTRY

I've been trying to do this problem but I would get confused and stuck.. Consider a sample of a hydrocarbon at 0.959 atm and 298 K. Upon combustion the entire sample in oxygen, you collect a mixture of gaseous carbon dioxide and water vapor at 1.51 atm and

*asked by J on November 7, 2008* -
## chemistry

Aerosol cans have a label that warns the user not to use them above a certain temperature and not to dispose of them by incineration. Even an empty can contains residual gaseous propellant. For example, the residual pressure in a can is 1.36 atm when it is

*asked by Katie on December 6, 2009* -
## Thermochemistry

A piece of tin is heated to 695 °C and dropped into 158 g of water at 23.2 °C. The temperature of the system rises to 30.7 °C. What is the mass of the tin dropped into the water? (C = 0.227 J/g°C for tin, C = 4.18 J/g°C for water)

*asked by Brybo on May 30, 2017* -
## Thermochemistry

A piece of tin is heated to 695 °C and dropped into 158 g of water at 23.2 °C. The temperature of the system rises to 30.7 °C. What is the mass of the tin dropped into the water? (C = 0.227 J/g°C for tin, C = 4.18 J/g°C for water)

*asked by Brybo on May 30, 2017* -
## momentum and it's conservation physics

when a fire hose is hook up to a water supple and the water is turn on the it frequently takes a firefighter to control the hose. why does a fire hose "recoil" when the water is turned on?

*asked by blaz3 on January 15, 2010* -
## Math

Chemistry of Life Multiple Choice 1. Which of the following form the main components of our body cells? carbohydrates and proteins fat and phosphorous proteins and iron nucleic acids and calcium 2. Organic compounds always contain______. water oxygen

*asked by Briana T on December 7, 2012* -
## MATH

Chemistry of Life Multiple Choice 1. Which of the following form the main components of our body cells? carbohydrates and proteins fat and phosphorous proteins and iron nucleic acids and calcium 2. Organic compounds always contain______. water oxygen

*asked by Help!!!!!!!!!!!!!! Fast its urgent Please!!!!!!!!! on December 7, 2012* -
## Chem

When 3.00 g of butane, C4H10, are combusted in a calorimeter containing 800. g of water, the temperature of the water changes by 44.4 °C. What is the heat of combustion of butane in kilojoules per mole? The molar mass of butane is 58.123 g/mol. The

*asked by Amber on April 20, 2016* -
## science check

The lake water in a location in Florida has been found to contain high levels of fecal coliform. What are people in the location most likely to do? breed fish in the lake stop swimming in the lake reduce their water consumption install water filtering

*asked by Oscar on April 12, 2016* -
## Chemistry

Write balanced equations that describe the following reactions. (Use the lowest possible coefficients. Include states-of-matter under SATP conditions in your answer.) a) the dissociation of perchloric acid in water b) the dissociation of propanoic acid

*asked by Micah on February 29, 2012* -
## biology

the unique properties of water make life possible on earth, select three properties of water and: a) for each propery, identify and define the property and explain it in terms of the physical/chemical nature of water b) for each property,describe one

*asked by Myles on December 13, 2010* -
## Physics

A swimming pool filled with water to its edge, the depth of the water is 2m and an electric lamp is placed at a distance equals 8m from the edge of the pool over a column its height 6m. Calculate the length of non-apparent part from the pool bottom with

*asked by Anab on November 2, 2012* -
## Math related rates

Water is poured into a conical paper cup at the rate of 3/2 in3/sec (similar to Example 4 in Section 3.7). If the cup is 6 inches tall and the top has a radius of 4 inches, how fast is the water level rising when the water is 2 inches deep? I got

*asked by chan on March 2, 2017* -
## physics

A 400 g marble block has a specific heat of 860 J/kg C deg. If the block is placed in 700 ml of water, the marble changes it temperature by 17 Celsius degrees. Since the specific heat of water is known to be 4186 J/kg C deg, what is the temperature change

*asked by Ann on February 20, 2014* -
## math

(1 pt) At the surface of the ocean, the water pressure is the same as the air pressure above the water, about 15lb/in2, Below the surface the water pressure increases by about 4.24lb/in2 for every 10 ft of descent. Write a function f(x) which expresses the

*asked by Anonymous on January 21, 2015* -
## Chemistry

In water conservation, chemists spread a thin film of certain inert material over the surface of water to cut down the rate of evaporation of water in reservoirs. Franklin found that 0.10 mL of oil could spread over the surface of water of about 49 m

*asked by Amy~ on August 24, 2010* -
## Chemistry

Please help! A drop of oil (volume 0.05 cm3) is released from a medicine dropper on to the calm surface of a pond where it spreads out to cover an area of 40 cm2. Assume that the oil film has a uniform thickness equal to the diameter of an oil molecule.

*asked by Bean on February 22, 2007* -
## Math

A rectangular prism is completely packed with 180 cubes of edge length fraction 1 over 3 inch, without any gap or overlap. Which of the following describes the volume of this rectangular prism? 19 unit cubes and 9 smaller cubes of volume fraction 1 over 27

*asked by Ali on January 20, 2016* -
## Physics

A rocket of 500 kg accelerates away from earth with an engine thrust of 13,500 N. a) what is the weight of the rocket? 4900 N b) how fast did the rocket accelerate? (I know the answer is 17.2 m/s^2 but how did they get that?)

*asked by Michelle on October 5, 2013* -
## chemistry

During which stroke of a four-stroke internal combustion engine is work done to the system of gases? A. Exhaust stroke B. Intake stroke C. Compression stroke D. Power stroke

*asked by Cortney on March 24, 2015* -
## physics

A car coasts (engine off) up a 30 degree grade. If the speed of the car is 25m/s at the bottom of the grade, what is the distance traveled by the car before it comes to rest?

*asked by Lorraine on September 16, 2012* -
## chemistry

Household bleach contains (NaClO)2 that decomposes in water, NaClO + h2o = Na+ + OH- + Cl2 + O2 If 15ml bleach containing 5.85℅ NaClO is allowed to decomposes completely, then hoe many mL of o2 at 22C and 755mmHg can be liberated. Density of bleach=

*asked by Nancy on September 30, 2014* -
## physics

water flow dowen a sloping pipe.the pipe tapers from 2m diameter at the top (A)to 1.4 diameter at the bottom (B)the volume flow rate is 23m/s. 1)calculate the velocities of the flow at points A and B. 2)if the end A is 12m higher than end B, and the

*asked by bani adam on November 7, 2013* -
## English

1. An apple floats on water. 2. A coin sinks in water. 3. An apple floats on the water. 4. A coin sinks in the water. -------------------------- In #1 and in #2, 'water' is in generic use, right? What about in #3 and #4? What is the difference?

*asked by rfvv on October 11, 2017* -
## Chemistry

Hydrogen peroxide solution, H2O2(aq), is available with a concentration of 1.667mol/L. When diluted to a concentration of 0.25mol/L, the solution is used as a disinfectant. What volume of water should be added to 100 mL of the concentrated hydrogen

*asked by Lori on February 22, 2013* -
## Chemistry

what happens when NaCl(s) is dissolved in water? (1)Cl-ions are attracted to the oxygen atoms of the water (2)Cl-ions are attracted to the hydrogen atoms of the water. (3)Na+ions are attracted to the hydrogen atoms of the water. (4)no attractions are

*asked by Tina on February 14, 2011* -
## Calculus

A cylindrical drum is made to hold exactly 1m^3 in its interior. Assume that the material for the top and the bottom costs $20 per m^2, while that for the side costs $10 per m^2. Determine the radius of the drum that minimizes the cost of the material

*asked by Frederique on December 10, 2006* -
## World History

Among the factors that brought about European colonialism, which of the following supported concepts of racial superiority? A. The introduction of the steam engine and the telegraph B. Social Darwinism C. Economic and trade opportunities D. the machine gun

*asked by Minerva Nall on October 27, 2014* -
## chemistry

if the average concentration of PCBs in the body tissue of a human is 4.0 ppm, what mass of the PCB is present in a 64 kg person? is this a significant amount in regards to the health of the person? What is the concentration of a solution of sodium nitrate

*asked by Anonymous on January 11, 2015* -
## chemistry

if the average concentration of PCBs in the body tissue of a human is 4.0 ppm, what mass of the PCB is present in a 64 kg person? is this a significant amount in regards to the health of the person? What is the concentration of a solution of sodium nitrate

*asked by Anonymous on January 11, 2015* -
## Math

What fraction of the volume of the rectangular prism is the volume of the rectangular pyramid?

*asked by Helen on April 3, 2016* -
## chem

A balloon was filled to a volume of 2.55 L when the temperature was 30.0∘C. What would the volume become if the temperature dropped to 11.0∘C.

*asked by a on December 1, 2015*