# Posts by amber

Total # Posts: 1,687

**chemistry**

What is the concentration of 10g of NaOH dizzolved in 0.95 L of water?

**science**

What mass of carbon dioxide is produced from the complete combustion of 5.20×10−3 of methane?

**us history**

False

**chemistry**

what is the difference between specific heat and heat capcacity?

**CHEMISTRY**

1.0 g of fat has 9kcal/g, while 1.0 g of carbohydrates and protein have 4kcal/g each, determine the total amount of Calories (kcal) in 1 serving if that serving contains 20.0 g of carbohydrates, 20.0 g of protein and 15.0 g of fat

**chem**

help with this problem pease Metal Specific Heat (J/g-C) Al (s) 0.900 Au(s) 0.129 Cu(s) 0.385 Fe(s) 0.444 Hg(l) 0.139 H2O(l) 4.184 C2H5OH(l) 2.46 A piece of metal at a temp of 101.0oC and a mass of 86.0 g is dropped into a beaker of water containing 75.0 ml at a temp. of 27....

**ap chem**

how do you find mole fraction?

**AP Chem**

Calculate the average kenetic energy of the CH4 molecules in a sample of CH4 gas at 273K and at 546K. So, should I have two answers or one? Super confused

**Advice**

Many things can contribute to moving... such as better pay, family issues, maybe going off to get more education. The possibilities are endless.

**managerial economics**

A) Total revenue is the product of the quantity sold and the price at which they were sold. (total revenue) = Q*P = Q*(24 - .5Q) = -.5Q^2 + 24Q This quadratic function will have a maximum at Q = -24/(2*(-.5)) = 24 Total revenue will be maximized when Q = 24. B) The profit on ...

**Chemistry**

What is the empirical formula for Dichloroethane?

**chemistry**

At what temperature (C) will a gas sample occupy 6.1 L if it originally occupies 17.8 L at 27.1C? T1V1=T2V2 T1(6.1)=(17.8)(300.25) T1=876? Please check my answer

**chemistry**

At what temperature (C) will a gas sample occupy 6.1 L if it originally occupies 17.8 L at 27.1C? T1V1=T2V2 T1(6.1)=(17.8)(300.25) T1=876? Please check my answer

**Chemistry**

How many grams of KCl would be formed in the reaction of 3.000 g of K2CO3 and HCl?

**Chemistry**

How many milliliters of 6.0 M HCl would be needed if 3.000 g of K2CO3 were used in an experiment?

**Chemistry**

What is the balanced equation for the reaction of 3.000 g of K2CO3 and HCl?

**English 2**

Need help with the same questions

**chemistry**

What volume (in Liters) of oxygen must react to form 17.0L of carbon dioxide according to the following balanced equation: 2CO(g) + O2(g) --> 2CO2(g) is this correct C G02 2

**chem**

Lithium hydride reacts with water as follows. LiH(s) + H2O(l) -->LiOH(aq) + H2(g) During World War II, U.S. pilots carried LiH tablets. In the event of a crash landing at sea, the LiH would react with the seawater and fill their life belts and lifeboats with hydrogen gas. ...

**chem**

A 31.2 cm3 bubble of air at 1.4 atm pressure is subjected to a new pressure of 3.9 atm. What will be the new volume (cm3)? Assume constant temperature. THe answer I got was 11.2 cm3 is this correct

**Chemisrty**

Calculate the work done when 60.0 g of tin dissolves in excess acid at 1.00 atm and 20°C. Assume ideal gas behavior.

**chemistry**

how many moles of ions are released when 1.6 mol of ammonium phosphate is dissolved in water?

**physics**

Sorry for so many posts, but you would not use delta v/ delta t to find acceleration. correct? on the graph it shows that at 1.1 second the graph changes directions therefore the slope of the tangent line at that point is equal to zero. I plugged it into the formula you gave ...

**physics**

Oh okay, thank you. The only thing included was a graph giving the points t=0s, speed= 0cm per second; t= .5s, speed= 15cm per second; t=1.1s, speed =28cm per second; t=1.6s, speed=6cm per second.

**physics**

The figure below shows the speed of a person's body as he does a chin-up. Assume the motion is vertical and the mass of the person's body is 73.4 kg. Determine the force exerted by the chin-up bar on his body at the following times. t=0s, speed= 0cm per second; t= .5s...

**physics**

The next thing I tried was to solve for T from by fbd. I got T=m1g-m1a for the first mass, then T1-T2=-fk*m2g+m1a for the second, and T=m3g+m3a. I don't know if this is right or not. Since I am trying to find the acceleration of each mass can i set these equations equal to...

**physics**

Im sorry, m1 is suspended by a pulley and string on the left side, m2 is on the table connected to the pulley by a string in the middle and m3 is suspended on the right side by a pulley and string which is also connected to m2. I am pretty sure I need to find an equation in ...

**physics**

Three blocks are connected on the table as shown below. The coefficient of kinetic friction between the block of mass m2 and the table is 0.400. The objects have masses of m1 = 3.00 kg, m2 = 1.45 kg, and m3 = 1.90 kg, and the pulleys are frictionless. Determine the ...

**2nd grade math**

Shawn is writing down the family recipes in a cookbook. He has 21 recipes left to write down. He has 3 pages left to fill up. If he wants to put the same number of recipes on every page, how many goes on each?

**Physics**

It actually wants to find how far you could climb with a penny.

**Physics**

Assuming 100% of your energy can be converted to electrical power, and electricity costs $0.10 for 1 kilowatt-hour, how high should you climb to make one penny's worth of electricity? Show all work & units. I have 288.8 watts, and that's as far as I have been able to ...

**calculus**

differentiate f(x)=Tan^3(e^2x +1)

**Math**

"Kids have done bunches (of) dumb (and) clumsy mistakes" is how I remember it. Say, if you were trying to figure this problem out: 1000 mL = ___ L. "milli" is the last M. Say that's the decimal point. To get to L (base, or the middle of the letters, ...

**Science**

A current of 7.50 amperes flows through an air conditioner. If the volyage in the wall outlet is 110 volts, what is the resistance in the air conditioner?

**chemistry**

How many grams of KCl are required to make .75 L of 0.29 M solution? Round to one decimal place. i got .2907 is this correct im not sure about the decimal places thanks

**chemistry**

oh okay i got it thanks

**chemistry**

Your answer leaves me with 1.63 so is this wrong moles oxalic acid = 0.500 L x 0.122 M=0.610 the ratio between Fe2O3 and H2C2O4 is 1 : 6 moles Fe2O3 = 0.610/6=0.102 mass Fe2O3 = 0.102 mol x 159.69 g/mol=16.3 g It left me with 16.3

**chemistry**

Oxalic acid (H2C2O4) can be used to remove rust according to the following balanced equation: Fe2O3 + 6H2C2O4 --> 2Fe(C2O4)33- +3H2O + 6H+ Calculate the number of grams of rust that can be removed by 5.00 x 102 ml of a 0.122M solution of oxalic acid. I know i need to ...

**chemistry**

write the balanced net ionic equation for this reaction Ba(OH)2+HCL-->

**chem**

whats the net ionic equation for the following reaction AgNo3(aq)+Na2SO4(aq) answer 2Ag+(aq)+SO42- (aq)___> Ag2So4(s) correct?

**chemistry**

so would the answer be M/L= 3.22 or .0322 ?

**chemistry**

what is the molarity of a solution made by mixing 178.5 of 1.5 M NaCl with 283.4m of 4.3M NaCl Mnacl*L nacle =(1.5)(.001718)=.0026775 moles nacl=(4.3)*(.002834)=.0121862 total moles = .0026775+.0121862=.0148moles final volume = .001785+.002834=.004819 L m/l= 3.21779 I don'...

**chemistry**

137.33/233.43*.438=.258 .258/567*100= 44.8 got it now thanks

**chemistry**

To analyze for barium in an unknown white powder, an excess of sodium sulfate solution was added to a 0.576 g sample of the powder dissolved in water. A white precipitate of BaSO4 was isolated, dried, and found to weigh 0.438 g. What is the mass percent of Ba in the white ...

**chemistry**

whats arrgg mean?

**chemistry**

a 340.4 ml sample of solution contains 27.4 g of cacl2. calcuate the molar concentration of calcium ion in this solution. this is what i did 27.4(110.98) =.247mol .247mol/34.4L=.726Mcacl2 is this correct?

**chemistry**

Oxalic acid (H2C2O4) can be used to remove rust according to the following balanced equation: Fe2O3 + 6H2C2O4 --> 2Fe(C2O4)33- +3H2O + 6H+ Calculate the number of grams of rust that can be removed by 5.00 x 102 ml of a 0.122M solution of oxalic acid.

**chemistry**

How many grams of water are formed when 43.4 g of hydrogen are consumed in an excess of oxygen? I got 390.6 is this correct?

**Calculus 2**

find the area of the region f(y)=y/(16-y^2)^1/2, g(y)=0, y=3

**general chem**

identify the 2 substances whose aqueous solutions have common properties to a marked degree and explain your answer. a) CuS, CuCI2, Na2 S, KCI b) HCI, HC2H3O2, NH4C2H3O2

**Economics**

Why is price stability and full employment important to our economy?

**science**

A bat flying in a cave emits a sound and receives its echo 0.4 s later. How far away is the cave wall? Assume the speed of sound to be 340 m/s. Answer in units of m.

**the writing process**

no its you should always be careful to aviod overexposure to the sun at the beach.

**Algebra 1**

4(5n-7)=10n+2

**college physics**

A CD has to rotate under the readout-laser with a constant linear velocity of 1.25 m/s. If the laser is at a position 3.2 cm from the center of the disk, what are the revolutions per minute (rpms) of the disk? Can someone please help me solve this problem step by step. The ...

**college physics**

A point (labelled P in the figure) is attached to the rim of a disk of radius 0.2 m, which can turn around an axis through its center. It is rotating counterclockwise with a speed of 2.5 m/s. Can someone please help me solve this equation step by step?

**Elements of Psychology**

i know for sure these are correct 1)d 2)a 3)d 4)b 5)c 6)a 7)b 8)c 9)c 10)a 11)a 12)d 13)a 14)b 15)a 16)d 17)b 18)c 19)a 20)a

**government**

Without the _____ to implement them, the decisions of Congress would have no meaning

**macro**

Suppose that the position of a nation's long-run aggregate supply curve has not changed, but its long-run equilibrium price level has increased. Which of the following factors might account for this event? a. A rise in the value of the domestic currency relative to other ...

**Chemistry**

Thank youuu!

**Chemistry**

How many joules (J) are needed to increase the temperature of15.0g of lead from 20 degrees celsius to 40 degrees celsius? (Specific heat of Pb is 0.128J/g degree celsius)

**algerbra**

Your mom is correct. You distribute the negative sign to the rest of the equation but there are no common factors to be put together so, yes it would be -a+3b-27

**math**

An experiment consists of flipping a coin 3 times and noting the number of times that a heads is flipped. Find the sample space S of this experiment. S=?

**domains of development**

describe why it is important to consider each domain in the study of adult development

**Math**

Add: 5 squared(4 squared 2 - 6 squared 25)= thanks

**Algebra**

I think I have the correct answer.. just want to make sure.. the answer is y+2/y-2 right?

**Algebra**

Please help: (y^2+4y/y^2+2y-8)/(y/y+2)

**Math**

t/6 - t/14= 1/6 Is there a solution for this problem?

**Creative writing**

what are some drafting strategies when writing

**Critical thinking**

Break the problems into workable parts. (In this step, explain how you broke the assignment into smaller more easily tackled parts and provide a reason for each part.)

**Pharmacy**

Where would you find information on drug interactions in an older-style drug monograph?

**Busine**

Can u give me sites where to research. I have tumor so Ive been really sick

**Busine**

Briefly explain what is meant by objective and judgmental performance evaluation. Discuss two methods of judgmental evaluation. 5. (TCO 8) Briefly describe the purposes of job analysis and the two documents that often result from it. 6. (TCO 9) List the advantages and ...

**EXP105**

SUMMARIZE BLOOM'S THEORY IN YOUR OWN WORDS AND HIGHLIGHT THE MAIN COMPONENTS

**ecology**

In what ways can nature restore a damaged ecosystem?

**algebra**

You are hosting a party at a restaurant. The restaurant charges $150 to reserve the room plus $25 per person for food and drink. 1. Write a linear equation representing your total bill based on the number of people at your party. 2. If you graph this line, what is its slope? 3...

**college**

define social change

**Physics**

If a tuning fork puts out a tone at 440 Hz, what is its wavelength in air at 25 degrees?

**Physics**

If a tuning fork puts out a tone at 440 Hz, what is its wavelength in air at 25 degrees?

**Physics**

Light of wavelength 550 nm in air is found to travel at 1.96 x 10^8 m/s in a certain liquid. Determine the index of refraction of the liquid.

**College Algebra**

Can anyone please show me how to solve (5¡Ì7 ¨C 10¡Ì2)(4¡Ì7 + 8¡Ì2)

**Physics**

1. What is the intensity of a sound at the pain level of 120 dB? 2. What is the intensity level of a sound whose intensity is 2.0 x 10^-6 W/m^2?

**spanish**

the correct answer is A because sueter is masculine and singular; esta is used for feminine singular

**Physics**

A 0.50-kg mass at the end of a spring vibrates 3.0 times per second with an amplitude of 0.15 m. Determine (a) the velocity when it passes the equilibrium point, (b) the velocity when it is 0.10 m from equilibrium, (c) the total energy of the system, and (d) the equation ...

**Physics**

Light in air is incident upon a piece of crown glass at an angle of 45.0 degrees. What is the angle of refraction?

**computer**

what type of business is hot topic? franchise, soleproprietor,corporation or partnership

**10th grade**

-6x-x^2z^2-4yz

**Chemistry**

How many calories are required to raise the temperature of 205 grams of water from 35.5 degrees celsius to 80.0 degrees celsius?

**soc**

what would be a intro that i could use about does punishment deter crime

**soc**

does punishment deter crime and why

**soc**

which type of punishment deters crime most effectively. and why. retribution, deterrence, rehabilitation and societal protection.

**soc**

which type of punishment deter crime most effectively

**soc**

do the consequences of punishment provide any beifits for criminals and society

**Kaplan university**

Could you please help me by rephrasing what it is asking me to do? Thank you.

**Kaplan university**

describe how something is learned using classical conditioning. Be sure to identify the unconditioned stimulus, the conditioned stimulus, the unconditioned response, and the conditioned response. For the second example you will use the theory of operant conditioning. For your ...

**ENGLISH**

The topic is: Why is it important to say what you think?

**ENGLISH**

I am having a hard time understanding key points to write my essay on. Can I get some opinions on why it is important to speak your mind?

**World History**

The military conquest of the assyrians were made possible by their A. powerful navy B. Efficient military organization and warlike spirit C. alliance with Egypt D. Country's natural barriers, which protected them from invasion by outsiders The famous orator who spoke out ...

**adult education**

Law means the rules or guidelines we must live by. To me justice is when someone has been punished for breaking the law or rules we live by. In the end the victim gets closure.

**Rephrasing a sentence**

during the years of our aquaintance, i have known guillermo to always be determined to long term goals and follow through with them; he truly is a man of his word .