# Shadow

Popular questions and responses by Shadow-
## Chemistry

If 3.21 mol of a gas occupies 56.2 L at 44*C and 793 torr, 5.29 mol of this gas occupies __________ L under these conditions. . -How will I solve this using PV= nRT? I tried using PV= nRT. By just plugging in the value and got 131 but the answer is around

*asked on April 1, 2013* -
## Math

A 64 inch long board is divided into lengths in the ratio 2:3. What are the two lengths into which the board is divided? Thanks

*asked on March 7, 2011* -
## chemistry

Hydrogen gas can produced by the reaction between metallic aluminum and aqueous hydrochloric acid 2Al+6HCl----2AlCl3+3H2 Hydrogen gas produced by this reaction is typically collected via water displacement, during which time the hydrogen gas becomes

*asked on November 19, 2013* -
## math

If a number is not a rational number, then it is _____. (1 point) a integer a rational number a whole number

*asked on September 26, 2017* -
## Chemistry

Find the enthalpy for : 4Fe + 3O2 = 2Fe2O3 I got the following informations: Fe + 3H2O = Fe(OH)3 + 3/2H2 - Enthalpy is 160.9 kj H2 + 1/2O2 = H2O - Enthalpy is -285.8 kj Fe2O3 + 3H2O = 2Fe(OH)3 - Enthalpy is 288.6 I try using Hess Law but cannot solve it.

*asked on May 13, 2013* -
## Chemistry

Determine the volume of methane CH4 gas needed to react completely with 0.660 L of 02 to form methanol CH3OH I'm confused because I'm sure CH4 + O2 don't give you CH3OH. Thanks

*asked on March 29, 2013* -
## Social Studies

1.Why is " elastic clause' an appropriate name for Clause 18 of Section 8 of Article l? 2.Think about what it mean to "express" something. Which powers - delegated or implied - could also be referred to as expressed powers? Why? 1.Elastic Clause is the

*asked on April 11, 2010* -
## chemistry

In the following reaction, how many liters of carbon dioxide, CO2, measured at STP, would be produced from the decomposition of 143 g of magnesium carbonate, MgCO3? MgCO3----MgO+CO2

*asked on November 19, 2013* -
## Algebra

A gardener is putting a wire fence along the edge of his garden to keep animals from eating his plants. -If he has 20 meters of fence, what is the largest rectangular area he can enclose? -What quadratic function represents the area of the garden? Thanks

*asked on December 1, 2011* -
## chemistry

Question: When a pink aqueous solution of potassium permanganate, faintly acidified with dilute sulfuric acid was treated with 10% aq. hydrogen peroxide, the reaction took place with the evolution of gas bubbles, and the pink solution was turned colorless.

*asked on May 5, 2011* -
## Math

State whether each expression is a polynomial. If the expression is a polynomials, identify it as a monomial,a binomial, or a trinomials. 1.7a^2b+3b^2-a^2b 2.1/5y^3+y^2-9 3.6g^2h^3k Are these the right answers? 1.Yes-trinomials 2.No 3.Yes- monomials.

*asked on May 9, 2010* -
## chem

Calculate the amount of heat required to convert 17.5g of ice at -33.5∘C to steam at 100.0∘C.

*asked on April 23, 2014* -
## Chemistry

H2O2 + Heat = H2O + O2 Would this be combustion or decomposition? Since the products are H2O and O2, I thought it would be combustion but then H2O can be decompose into H2O and O2 which would be decomposition.

*asked on January 13, 2013* -
## Algebra

The volume in cubic feet of a Cd holder can be expressed as V(x)=-x^3-x^2+6x, the depth is 2-x , factor the polynomial to find linear expression for the height and the width. - Do I just factor the -x^3-x^2+6x? It because I know the volume is LWH, so don't

*asked on February 7, 2012* -
## Algebra

Suppose f(x)=2x-5 and g(x)= |-3x-1|. Find each value. f(1)+g(2) How would I solve this problems? If anyone could give me the step, thanks a lot.

*asked on October 18, 2011* -
## Physics

A playground is on the flat roof of a city school, hb = 5.70 m above the street below (see figure). The vertical wall of the building is h = 6.90 m high, to form a 1.2-m-high railing around the playground. A ball has fallen to the street below, and a

*asked on December 14, 2018* -
## math

which solid does the net form? hexagonal prism hexagonal pyramid rectangular prism rectangular pyramid

*asked on December 5, 2017* -
## Precaculus

tan4.7 * cot4.7 I understand tan4.7 = 1/ cot 4.7 but I'm stuck after this thanks.

*asked on March 6, 2013* -
## Chemistry

The problem ask what is the mass of iron(iii) chloride contains 2.35 x 10^23 chloride ions. I understand the molar mass is 162.20 g/mol. - 2.35 x 10^23 chloride ions would be around 0.39 moles. - The work that my teacher gave me is 0.39 moles * (1 mol

*asked on January 29, 2013* -
## Chemistry

How many moles of ion are in the following? A. 0.0200 g AgNO3 - Could someone give me the step to solve such problems? Thanks

*asked on January 29, 2013* -
## Algebr

Each week you must do a minimum of 18 hours of homework. Participation in sports requires at least 12 hours per week. You have no more than 35 hours per week in total to devote to these activities. - Write a system of inequalities to model the situations.

*asked on November 13, 2011* -
## Math

The length of a rectangle is 5 cm greater than it width. The perimeter is 58 cm. What are the dimension of the rectangle? I know the formula for Triangle Perimeter is 2(L+W) and the L is +5 more than the W but I can't write the equation for it. This is

*asked on September 1, 2011* -
## L.A

Could someone help me interpret this poem?Thanks Nature's first green is gold, Her hardest hue to hold. Her early leafs a flower; But only so an hour. Then leaf subsides to leaf. So Eden sank to grief, So dawn goes down to day. Nothing gold can stay.

*asked on May 3, 2010* -
## Math

A standard deck of playing cards contains 52 cards in four suits of 13 cards each. Two suits are red and two suits are black. Find each probability.Assume the first card is replaced before the second card is drawn. 1.P(black,queen) 2.P(jack,queen) How

*asked on February 10, 2010* -
## Social Studies

1. What caused the settlement of African Americans in the Mississippi Alluvial Plain region than in the Ozark Mountains region. Slavery and Plantation . Mining and logging . The use of modern technology. Low priced land and modern technology. 2. Why did

*asked on February 13, 2019* -
## JAVA

Using only one "System.out.print" command, print the following quote. Make sure to include the quote marks (") in your output. "I do not fear computers. I fear the lack of them." Isaac Asimov

*asked on December 14, 2018* -
## social studies

Which of the following best describes the similarity between emerson's and thoreau's central beliefs? A.They both lectured on the importance of the inner light B.they both believed the human spirit was reflected in nature C.they both considered the rise of

*asked on November 2, 2017* -
## math

Which of these nonterminating decimals can be converted into a rational number A 0.48907542 repeating B 0.02020202 repeating C 0.92589542 repeating D 0.10203040 repeating

*asked on September 26, 2017* -
## math

find the length of the hypotenuse of a triangle with legs of 5 ft and 12 ft? 11 ft 13 ft 17 ft 60 ft

*asked on September 26, 2017* -
## social studies

which of the following statements best reflects the rights of citizens that are protected by the bill of rights

*asked on September 21, 2017* -
## Chemistry

Calculate the grams of oxygen gas present in 2.5 L sample kept at 1.66 atm pressure and a temperature of 10 C. - I got 5.72 grams Determine the volume of oxygen gas needed to completely combust 0.202 L of Butane(C4H10). -I got 1.31 L O2. -Thanks

*asked on March 31, 2013* -
## Chemistry

Water has an extremely high boiling point compared to other compounds of similar molar mass because of ? Hydrogen Bond Adhesive force Covalent bonding Dispersion Forces I believe the answer is A since hydrogen bond is a strong bond and thus require most

*asked on March 10, 2013* -
## Chemistry

I need to write a balance equation of the decomposition of aluminum carbonate. I know the starting "reactant" is Al2(CO3)3 but would the "product' be 2Al + 3(CO3) ? Thanks

*asked on February 18, 2013* -
## Chemistry

Because the mass of the reactants equal to the mass of the product of a reaction, the number of moles will be conserved. -I think this is sometime true but I don't know a way to prove that it sometime true. Anyone got an idea ? Thanks

*asked on February 10, 2013* -
## Chemistry

Let say Pb(NO3)2 combine with FeCl3, would this yield PbCl + Fe(NO2)3? Thanks

*asked on January 27, 2013* -
## Math

The metric ton of CO2 product per gallons of gas can be calculated with the following. 8.78 x 10-3 metric tons of CO2 are emitted per gallon of gas. Let say the gallon of gas is 1288. Would the CO2 produced be around 11.3 tons? Thanks

*asked on January 22, 2013* -
## Chemistry

Would this be a double or single replacement and why? Thanks Na2O2 + H2O -> NaOH + O2 Would it be single since the Na is pair with H?

*asked on December 18, 2012* -
## Algebra

For which value of b would make the equation 3|x-2|=bx-6 have infinitely many solutions? How would I find the values? The choices are -6,-3,3,6.

*asked on October 23, 2011* -
## Shadow

Write an equation to solve each problem. The sides of one cube are twice as long as the sides of a second cube. What is the side length of each cube if the total volume of the cubes is 72 cm^3? Would it be, 3x+6x=72? Thanks

*asked on September 1, 2011* -
## Geometry

Use the Law of Detachment to write a valid conclusion for the given information. 1.If two angles are supplementary, then their measures have a sum of 180. 2.Angle X and Angle Y are supplementary. Would the conclusion be this? Thanks -The sum of X and Y is

*asked on October 17, 2010* -
## Math

Determine whether the following statements are always,sometime, or never true.Explain 1.Three points determine a plane. 2.The intersection of two planes can be a point. 1.Never true, the three points must be noncollinear. 2.Never true, the intersection of

*asked on October 6, 2010* -
## Science

How sediments,fossil, and ice core record Earth's geologic history? It record Earth's geologic history by giving scientist an idea of when certain climates or events happen.(Is this a good answer?) Thanks

*asked on October 6, 2010* -
## Math

Through a given point on a line, there is one and only one line perpendicular to the given line. The hints that it gave was "Do not limit your thinking to just two dimensions". If it just a regular line there will only be one perpendicular line right?

*asked on September 9, 2010* -
## Social Studies

Congressional committee must pass along every bill to be debated and voted on by the other members of their respective houses. Is this true or false?

*asked on April 18, 2010* -
## Social Studies

1.Do you think the special powers of the Senate or those of the House of Representatives are more important? What is this question asking me? It is asking me who power do I think is more important between the Senate and the House of Representatives? Thanks

*asked on April 11, 2010* -
## Math

Express each statement using an inequality involving absolute value.Do not solve. 1.The majority of grades in Sean's English class are within 4 points of 85. 2.AA thermometer is guaranteed to give a temperature no more than 1.2F from the actual

*asked on March 17, 2010* -
## Math

1.Four coins are tossed.What is the probability of tossing all heads? 2.A card is chosen at random from a deck of 52 cards.It is then replaced and a second card is chosen.What is the probability of getting a jack and then an eight?

*asked on February 17, 2010* -
## Math

1.Four coins are tossed.What is the probability of tossing all heads? 2.A card is chosen at random from a deck of 52 cards.It is then replaced and a second card is chosen.What is the probability of getting a jack and then an eight?

*asked on February 17, 2010* -
## Chemistry

Determine the mole fraction of acetone in a solution prepared by adding 0.456 kg of (CH3)2CO to 0.899 L of C4H8O. Molar Mass (g/mol) (CH3)2CO 58.05 C4H8O 72.12 Density (g/ml): (CH3)2CO 0.7899 C4H8O 0.8892 Name/Formula: acetone (CH3)2CO tetrahydrofuran

*asked on February 14, 2010* -
## Language Arts

In the third stanza of the poem, which lines rhyme?

*asked on March 3, 2020* -
## math

Six times the sum of a number and 16 is at most 27. Use the variable y for the unknown number.

*asked on November 18, 2019* -
## Precalculus

How do i solve this problem? Find the polar form of the complex number where the argument satisfies 0≤θ≤2π. 0+3i

*asked on January 26, 2019* -
## Math

Emilio has 8450 trees to plant in rows on his tree farm he will plant 125 trees per row how many full rows of trees will he have explain

*asked on May 8, 2018* -
## math

Match the term with it's meaning real numbers irrational numbers rational numbers integers whole numbers natural numbers radical square root perfect squares cube roots terminating decimals repeating decimals truncate radicand a decimal which can be

*asked on April 17, 2018* -
## Social Studies

Why did the United States become involved in Mexico's civil war? Select all that apply. 1)Relations had weakened between the United States and the new government. 2)Mexico was unable to end the war without U.S. intervention. 3)The United States provided

*asked on January 31, 2018* -
## social studies

Which factor best accounts for the price change in the Model T automobile? A. Low deman B. Orginized labor C. Mass production D. wartime inflation

*asked on December 16, 2017* -
## math

What is the surface area of the given figure. A.) 1,008 cm B.) 1,728 cm C.) 1,392 cm D.) 1,216 cm

*asked on December 5, 2017* -
## math

sara needs to cover the top and sides of the cylinder below About how many square inches of paper will Sara need? 528 in. 415 in. 207 in. 179 in.

*asked on December 5, 2017* -
## science

A powerpoint about four landforms

*asked on November 14, 2017* -
## social studies

Which of the following laws would the free-soil party have supported? cottonocracy slave codes wilmot proviso fugitive slave act ms sue i don't want a link

*asked on November 12, 2017* -
## Language

I have to write a essay and I don't know how to lengthen the rough draft could someone please give me tips? Here's my rough draft Comparison-and-Contrast Essay The Story-Teller and The Drummer Boy of Shiloh Comparison and Contrast means to tell the

*asked on November 10, 2017* -
## social studies

We hold these truths to be self-evident: that all men and women are created equal; that they are endowed by their creator with certain unalienable rights; that among these are life, liberty, and the pursuit of happiness what founding documents is being

*asked on November 2, 2017* -
## social studies

what is this drawing of a camp meeting likely illustrating? A. the growth of reform movements in the united states B. the large influence revivals had on americans C. the rise in the formation of women's trade unions D. the increase in support of american

*asked on November 2, 2017* -
## social studies

How did Horace Mann contribute to the reform in education? A. His development of books with raised letters aided in the education of the blind B. His educational philosophy led to a new approach in educating the deaf C. His radical call for classroom

*asked on November 2, 2017* -
## social studies

How did horace mann feel that reforming the american educational system was important? A. it would help people attain better jobs B. it would help in the fight to end slavery C. it would help in the fight for gender equality D. it would help people become

*asked on November 1, 2017* -
## science

where does energy come from in north carolina

*asked on October 31, 2017* -
## educational technology

5-7 sentences about the progressive era

*asked on October 30, 2017* -
## social studies

why does the cartoon from the bank war 1832 portray president jackson as a king? A many people felt he was motivated by his own wealth B some felt he had used his power inappropriately in vetoing legislation to recharter the bank C some felt there remained

*asked on October 19, 2017* -
## math

Solve the following proportion x/3 = 6/9 A 18 B 27 C 2 D 24

*asked on October 16, 2017* -
## math

Solve the following proportion x/3 = 8/9 A 18 B 27 C 2 D 24

*asked on October 16, 2017* -
## social studies

Why did Jefferson oppose Hamilton’s plan for creating a national bank? Select all that apply. (2 points) He argued that Congress did not have the constitutional power to establish it. He felt that there would be no way to effectively run a national

*asked on October 3, 2017* -
## social studies

Which of the following statements best summarizes Washington’s viewpoint on American foreign policy? (1 point) The United States can take advantage of Europe’s ambition. The United States should limit interaction with Europe to commerce, or trade.

*asked on October 3, 2017* -
## Math

I need helppp D: ---------------- Simplify the expression -4-5(x+8) *-5x-44 *-5x+36 *-x-8 *-20x+8 5x+6(x-2)-8(x-3) *19x+36 *19x+12 *3x-36 *3x-12 x+8

*asked on October 3, 2017* -
## math

If the relative change between the original price and the new price is 30% decrease, then the new price is ________% of the original price?

*asked on September 30, 2017* -
## ELA

Your assignment for this portfolio is to do the following: research the Victorian period in England. You can focus on work, schools, historical events, cultural details, or holiday traditions. Compare the Victorian period to modern day life.

*asked on May 6, 2017* -
## math

5. 4, 12, 36, 108, . . . A. 304, 912, 2,736 B. 324, 972, 2,916 C. 354, 1,062, 3,186 D. 332, 996, 2,988

*asked on February 27, 2017* -
## science

Earth's energy sources include both renewable and nonrenewable resources. name at least three sources of energy that could be used in your house. then describe the ideal energy source for generating most of your home's electricity, and explain why you

*asked on February 27, 2017* -
## Math

A rectangular piece of fabric measures 37 by 45 inches. A triangular scarf with a height of 21 inches and a base of 25 inches is cut from the fabric. How much fabric is left over?

*asked on February 17, 2016* -
## Math

1. What value for x makes the sentence true? 7x = 1 0 6 3 2

*asked on November 25, 2014* -
## Math

The number p is the product of three different positive prime numbers greater than 2.If the sum of these three prime number is also prime, what is the smallest possible value for p? Won't the 3 number be 3-5-11? Thanks

*asked on May 21, 2014* -
## Calculus

Find the position s as a function of time t from the given velocity v=ds/dv. Then evaluate the constant of integration so that s = s0 when, t = 0. 1. v = 3t2 , s0 = 4 I don't quite understand what the question is asking or what is s0 mean. Than

*asked on January 12, 2014* -
## Physic

A horizontal force F pulls a mass m across the floor at constant speed a distance d. If the coefficient of friction between box and floor is u, the work done by the force F is. I know W= FD and Wf = umgd, but I don't understand what the question asking.

*asked on December 8, 2013* -
## Physic

An elevator weighing 2000 kg falls with a downward acceleration of magnitude (1/2)g . What is the tension in the supporting cable? I got the answer as 49000 N.

*asked on September 16, 2013* -
## Physic

A car traveling 100 km/h is 200m away from a truck traveling 50 km/h (in the same direction). Assuming constant braking acceleration, what is the minimum deceleration the car must have if it is not to hit the truck? Can someone hint me on how I can start

*asked on August 28, 2013* -
## Math

Let say 5m x 5m, I know the answer is 25 m^2, but let say it was 25m / 5m, what would the answer be? I know it 5 but what the unit? Just 5m? Thanks

*asked on August 25, 2013* -
## Significant Figures

The problem is 150 - 1 - 0.182 Since the least sig. fig. is 1 would the answer be 1 x 10^3 ?Thanks

*asked on August 22, 2013* -
## Math

The problem I have to solve is log with base 2 ^6 multiply by log base 6 ^ 8. I use the change of base formula and got log6/log2 * log8/log6 Which become log6/log2 * log2()^3/ log 6 I'm stuck here thanks.

*asked on June 18, 2013* -
## Chemistry

So I did a lab that consist of baking cookies and the mass of the final products isn't equal to the ingredients used. Could there be mass lost as gas ? What other factors might there be? Thanks

*asked on May 26, 2013* -
## Chemistry

Find the polar coordinate of the following. (0,-6) I know r = sq.root of 6 but tan theta = -6/0 doesn't exist so how will I find the degree? Thanks

*asked on May 19, 2013* -
## Chemistry

Name the compounds CH3CH2CHCH2CH3 - Is this 3-Pentane? Thanks

*asked on May 9, 2013* -
## Chemistry

How much water must be added to 6 mL of a 0.05M stock solution to diltue it to 0.02M ? The answerI got is 15 mL. Is this correct? Thanks

*asked on April 18, 2013* -
## Math

Is 2Cos x the same thing as Cos^2 x? Thanks

*asked on April 7, 2013* -
## Precalculus

Verify the identities. Cos^2x - sin^2x = 2cos^2x - 1 When verifying identities, can I work on both side? Ex. 1 - sin^2x - sin^2x = 1 - 2sin^2x 1 - 2sin^2x = 1 - 2sin^2x

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

Does mass affect pressure? I understand volume, and temperature does but not sure about mass. If I have a gas with mass 15 g, wont this exert less pressure than a gas have a mass of 30 g?

*asked on April 1, 2013* -
## Chemistry

The temperature of oxygen is 810 torr at 298 K , what will the pressure be at 330 K? Using Lussac's Law, would the answer be 896.98 torr? Thanks

*asked on March 31, 2013* -
## Chemistry

Do elements with higher masses always have lower average velocity than those elements with a low mass? Thanks

*asked on March 12, 2013* -
## Chemistry

I had to find the root mean square velocity of a gas using the only formula KE=1/2MV^2 . Is this even possible using only this formula?

*asked on March 11, 2013* -
## Chemistry

I had to find the root mean square velocity of a gas using the only formula KE=1/2MV^2 . Is this even possible using only this formula?

*asked on March 11, 2013* -
## Chemistry

What are the attractive forces that increase surface tension? -Would it be cohension and adhension? Thanks

*asked on March 5, 2013* -
## Math

How would I solve this part of the Fibonacci sequence piecewise function? f(n) = f(n-1)+f(n-2) if n > 1. Thanks

*asked on March 2, 2013*