# Posts by Emma

Total # Posts: 1,726

**Chemistry**

combustion analysis of 63.8 mg of C,H, and O containing compound produced 145.0 mg of CO2 and 59.38 mg of H2O. What is the empirical formula for the compound?

**RE:ENGLISH QUOTE**

Is there a different way to explain the meaning of the quote?

**RE:ENGLISH QUOTE**

Here is my meaning of Hellen Keller's quote: It means that by using my voice I can do something. I may not be THE one but AT LEAST I AM one. I know that I can't do everything but the thing is, I CAN do SOMETHING. I will do what I can do to make a difference. I don'...

**English**

“I am only one, but still I am one. I cannot do everything, but still I can do something; and because I cannot do everything, I will not refuse to do something that I can do.” Please explain what this quote means, thanks!

**English**

"It is better to lead from behind and to put others in front, especially when you celebrate victory when nice things occur. You take the front line when there is danger. Then people will appreciate your leadership." What does this quote mean?

**English-Speech**

I am workng on my introduction part of my speech and here is my transition sentence: With my voice, I can make a difference in 5 different ways. Would these be like the examples of the "5 different ways" ? preventing people from doing a bad action, helping a friend ...

**English**

What does the quote, ""The world is not interested in what we do for a living. What they are interested in is what we have to offer freely - hope, strength, love and the power to make a difference!" mean?

**math**

You need 1/2 cup of sugar to make a three layer cake. How much sugar would you need for one-layer cake?

**math**

2/10 , 3/15 , 4/20, 5/25 Those are some examples.

**English**

I want to put these words in a sentence that makes sense. Many will think that my voice doesn't matter for people my age. It doesn't sound right to me.

**Physics**

three rotating, uniform disks that are coupled by belts. One belt runs around the rims of disks A and C. Another belt runs around a central hub on disk A and the rim of disk B. The belts move smoothly without slippage on the rims and hub. Disk A has radius R; its hub has ...

**English**

What would be a good quote to describe me encouraging someone to become a better singer? How about giving advice and preventing something?

**math**

You are correct.

**math**

4x if x=0.016 You just substitute in 0.016 for x 4 * 0.016 = ?

**English Speech**

That does not make any sense to me...

**English Speech**

This year, all the students in the same grade has to give a speech and the topic is "My voice is important because..." instead of repeating in every new story, "my voice is important because.." what is another way to state it?

**physics**

The small mass m sliding without friction along a looped track is to remain on the track at all times, even at the very top of the loop of radius r. a) In terms of the given quantities, determine the minimum release height h b) If the actual release height is 5h, calculate the...

**chemistry**

Aspirin tablet, mass of tablet= 0.4149 g concentration of iron III salicylate complex = 3.997E-4, What is the concentration of ASA in the original solution? What is the mass of ASA in the original solution? The procedure was as follows: accurately weigh by difference a tablet ...

**chemistry**

Aspirin tablet, mass of tablet= 0.4149 g concentration of iron III salicylate complex = 3.997E-4, What is the concentration of ASA in the original solution? What is the mass of ASA in the original solution? The procedure was as follows: accurately weigh by difference a tablet ...

**Chemistry**

Aspirin tablet, mass of tablet= 0.4149 g concentration of iron III salicylate complex = 3.997E-4, What is the concentration of ASA in the original solution? What is the mass of ASA in the original solution? The procedure was as follows: accurately weigh by difference a tablet ...

**Chemistry**

So does that mean that the salicylate and the iron 3 complex will have an equal amount of mol since they are reacting in a 1:1 mol ratio. If this is true than how will i calculate the concentration of the iron 3 salicylate complex?

**Chemistry**

1 ml of 8.675x10^-3 M sodium salicylate was dispensed in a 100 ml volumetric flask, It was diluted to 100ml mark with acidified 0.02 M Iron (III) Chloride solution. What is the number of moles of Iron (III) Salicylate complex?

**History**

What are five kinds of cases heard by the Federal Courts?

**History**

Thanks! It really helped a lot. I don't think I need help on the question that I posted anymore.

**History**

What are the four powers denied to congress?

**chemistry**

Spectrophotometric analysis of commercial aspririn. If the number of moles of sodium salicylate are 8.675x10^-6 what would be the number of moles of Iron (III) Salicylate complex and what would be its concentration. The volume of sodium salicylate used is 1 ml and its ...

**physics, university**

A 50.0-g sample of a conducting material is all that is available. The resistivity of the material is measured to be 11 x 10-8 ohms/m and the density is 7.86 g/cm3. The material is to be shaped into a solid cylindrical wire that has a total resistance of 1.5 ohms. a) What ...

**Math**

14.8cos(27.8)(29cos(x))+14.8sin(27.8)(29sin(x))=22 How do you solve for x?

**Physics**

Vectors A and B are in the xy plane and their scalar product is 20.6 units.? If A makes a 27.8 angle with the x axis and has magnitude A= 14.8 units, and B has magnitude B= 29.0 units, what can you say about the direction of B?

**Math-Correct Please**

Did I do this problem right? Rewrite the equation in slope-intercept form. y+4=5(x+2) y=5x+6

**physics**

The maximum possible efficiency of a heat engine which exhaust its heat at a temperature of 46.0o is 39.0 percent. What is the minimum value of the temperature at which the engine takes in heat? *I think I keep doing a step wrong in here so step by step instruction would be so...

**PHYSICS**

15.0 moles of an ideal gas, at an initial pressure of 3.50 x105 N/m2 and an initial volume of 1.200 m3, undergo a small isothermal expansion to a volume of 1.220 m3. Find the work done by the gas.

**English**

Are there any words that end with "ale" or "ail" that is a place?

**Chemistry**

Thankyou Dr. Bob also on my other question I am not sure how to get the heat capacity of NH4Cl to calculate molar enthalpy and I also don't know how to determine the concentration of NH4Cl inside the calorimeter. Please help me on that question as well and thankyou soo much.

**Chemistry**

A 5ml, 10ml, 15 ml, and 20ml Aliquot of 0.010 M sodium salicylate solution was diluted to 100 ml in four different 100ml volumetric flasks with the iron (III)Chloride solution. What are their concentrations.

**Chemistry**

Thankyou Dr. Bob and can you please help me on one more question if this reaction goes to completion what would the final concentration of NH4Cl in the calorimeter. I know how to figure it out if its not in the calorimeter but I am wondering if the calculations are different ...

**Chemistry**

I don't know the heat capacity of NH4Cl or the density of it, can you please help me figure those out.

**Chemistry**

Calculate the molar enthalpy for the following reaction. HCl(aq) + NH3 (aq) --> NH4Cl (aq). HCl = 50 ml (2.00M) NH3 = 50 ml (2.05 M) Delta T = 9.28 degrees Celsius. Ccal = 28.9J/g degrees celcius.

**Math**

Please help me understand this question, thanks! 10. Write the slope-intercept form of an equation of the line perpendicular to the line in Exercise 7 with a y-intercept of -3. 7. (4, -9), (-3, 2)

**Physics**

Three uniform thin rods, each of length L = 16 cm, form an inverted U. The vertical rods each have mass of 14 g; the horizontal rod has mass of 50 g. Where is the center of mass of the assembly (x, y)?

**Physics Q**

If a water heater has a capacity of 54.4 gallons and a 4910 W heating element, how much time is required to raise the temperature of the water from 19.8oC to 60.0oC? Assume that the heater is well insulated and no water is withdrawn from the tank during this time.

**Physics Help!**

An air bubble has a volume of 1.51 cm3 when it is released by a submarine 102 m below the surface of a lake. What is the volume of the bubble when it reaches the surface? Assume that the temperature of the air in the bubble remains constant during ascent.

**PHYSICS!**

0.115 kg of water at 81.0o C is poured into an insulated cup containing 0.220 kg of ice initally at 0o. Calculate the mass of liquid when the system reaches thermal equilibrium.

**S.S. Check answers**

you got them all right :) i got a 100%

**Physics**

If a sonar echo takes 2.20 seconds to return from a whale, how faw away is the whale?

**Math**

Actually it's 12 because you have to divde 24 by 2 and it leaves you with 12.

**Math**

8 / 10 = x / 15 times 15 on each side =24

**Literature**

Please help me understand this, thanks. The way a topic is handled is called its treatment. Review the chart you completed as you read the speech. Then describe Obama's treatment of his family in the speech. By speech, it's referring to Out of Many, One.

**Math Vocab**

I am doing vocabulary for math and one of the words are negative correction. I search all over the place and didn't find a definition for that word. Help please.

**Algebra**

Oh ok I get it. Is there any work to show to get this answer?

**Algebra**

May you please help me understand how to do this? Thanks Give the slope of a line perpendicular to the given line. 1. y=3x+5

**Thermal Physics, Kinetic Theory of Gases**

Your velocity is incorrect, it is too slow

**Language arts**

Check my answer please Which of the following would not be considered an asset? A) credit card debt B) a good credit rating C) an education Answer: A

**calculus**

lim x^(3)+x x->2 Suppose x^(2)+1 is greater than equal to f(x) is greater than equal to 4x-3 for all x. Compute lim f(x) x->2

**math**

(-x-3)+(4x-7) =3x -10

**Math**

To rewrte it in y=mx+b form, you do this : 3y=6x+3 divide both sides by 3 so it would be y= 2x+1

**math**

(14x-5)+(6x-4) = 14x-5+6x-4 Combine all like-terms =20x-9 Thus, 20x-9 is your final answer. Hope I helped!

**English**

Oh okay, thanks I get it now.

**English**

The full verb is "was propelled" Why wouldn't it be passive?

**English**

Write the complete verb in each sentence. Label it active or passive. 1. It was propelled by six paddles on each side. Each side was propelled by six paddles. Passive?

**Math**

I don't really know

**Algebra**

May I ask how you got 5x-5=0 ?

**Algebra**

I don't get how you do this please help, thanks! Write the equation in the form ax+b=0. Then write the related function y=ax+b. 5x+2=7

**math**

Write a formula for this sequence: 50, 83, 116, 149,... I just don't know how to find it..

**English**

I have to come up a reason for my claim help please? Thanks! My claim: technology is harmful to children and teens.

**Algebra**

Can you please help me understand this? Thanks Find the value of y so that the passing line through the two points has the given slope. 1. (2,y) (3,3) ;m=2

**6th grade Math**

Change 85% to a decimal which is 0.85 and then times it by 20: 0.85*20 = ? You times them together and you'll get your answer. Hope I helped!

**English**

Change the verb into the tense indicated. I am here. (past perfect)

**Physics**

A 2.7 kg bucket of water is raised upwards by a rope. If the bucket has an acceleration of 3.4 m/s/s, find the force exerted by the rope on the bucket.

**Physics**

A car with a mass of 1797 kg is moving to the right at a constant velocity of 2.50 m/s. What is the net force acting on the car?

**Physics**

On an aircraft carrier, a jet can be catapulted from 0 to 155 mi/h in 2.00 s. If the average force exerted by the catapult is 5.53×106 N what is the mass of the jet?__________ kg

**Physics**

A 747 jetliner lands and begins to slow to a stop as it moves along the runway. If its mass is 3.50 x 105 kg, its speed is 27.0 m/s, and the net braking force is 4.73 x 105 N. (a) What is its speed 7.50 s later? (b) How far has it traveled in this time? (a) Its speed 7.50 s ...

**History**

What country are these cities in? Bellman, Port-au- Prince , Tegucigalpa and Managua?

**Algebra**

How can you tell by looking at a table if its quadratic, linear or exponential? For ex. x: -2, -1, 0, 1, 2 y: 6, 1, 0, 1, 6

**English**

Complete the sentence by writing the correct form of the verb shown in parenthesis. "It has _______," Martin said matter-of-factly. (burst)

**Physics**

In a circus performance, a monkey on a sled is given an initial speed of 3.2 m/s up a 31° incline. The combined mass of the monkey and the sled is 20.7 kg, and the coefficient of kinetic friction between the sled and the incline is 0.20. How far up the incline does the ...

**Landforms-history**

What is a large, raised that rises above the surrounding ground?

**science**

how does a change in wavelength affect the speed of a photon.

**science**

how many days would it take to fly to Jupiter (from Earth) in a space shuttle at 45,000 miles per hour? The minimum distance between the Earth and Jupiter is 365 million miles.

**science**

how many days would it take to drive from the earth to the moon at a speed of 75 miles per hour? the average distance from the earth to the moon is 380,000km. 1 km=0.62 miles

**History**

True or False: 1. A region near the ocean will be cooler than a region inland of the same latitude. 2. The tundra is an area of cold climate with low-lying vegetation. (true?) 3. The climate of highland regions gets colder and colder as you go higher. (false?) 4. Temperate ...

**3rd Grade Math**

there are 16 girls

**Math**

How can you tell by looking at a graph if it's a linear, quadratic or exponential function?

**English**

I am writing an evidence paragraph telling what people do to their bodies in order to look good. Make-up, braces, surgery , etc are examples but they are not really "technology". This is what I have so far: Today we have upgraded technology ... Is there another word ...

**English**

Underline the verb phrase and circle the main verb. Mandy is reading about different languages. Verb Phrase: is reading Main Verb: Reading?

**Algebra**

Substitute the numbers in x and solve. 1) 4/5^x -2,-1,0,1,2 2) 2^x -2,-1,0,1,2

**History**

The areas between the Tropics of Capricorn and Cancer are (A. High or B. Low) latitudes.

**Math**

Can you please give me an example of a function notation? Thanks.

**Math**

Anyone know how to do this? :/

**Math**

find the difference quotient when given f(x)= -2x^2+4x-1

**English**

Can you please help me rephrase this so there won't be any "I, Me, My, Us, We, Our, Your or You" in it? Thanks Have you ever given up something you love?

**biochemistry**

The pH of 0.02M solution of a weak acid was measured at 7.6. What is the [OH-] in this solution? B) The Ka for benzoic acid is 6.4 x 10-5M. 150 ml of 0.1 M NaOH is added to 200 ml of 0.1 M benzoic acid, and water is added to give a final volume of 1 L. What is the pH of the ...

**English**

Would a soldier sacrifice their life to serve the country?

**English**

Can you please give me three examples of friendship and sacrifice? Thanks.

**Common ways**

What is a common way we may need help?

**Chemistry**

A pool is 4.57 m long, 3.04 m wide, and 1.83 m deep. If the pool is completely filled with water, what will the weight of the pool be in pounds if 1 Kg=2.2 pounds.

**algebra**

solve for h: v=lwh V=lwh 1. divide lw on each side 2. VLW= H Am I right?

**English**

Ok, I think I got it. Also, does sacrifice mean "given up"?

**English**

I am writing two paragraphs about two themes but I can't think of two conclusion sentences. The themes are friendship and sacrifice. Help please? Thanks

**math**

An example of: Ratio of a to b