chemistry! URGENT

60,616 results, page 7


Write and simplify the expression. My answer: 2x +(x+3)(x-2) = x^2-x-6 Textbook Answer: x^2-x-2 Please help. Thanks.

Algebra; URGENT

How can you tell the difference between a vertical strecth and a vertical shrink?

Math please help urgent !

Find the slop of the tangent to the curve y=(10-sqrt x)(5+sqrt x) at x=25

7/8 Math URGENT!!! PLZ HELP!! ANYONE????

The $42 shirt came to $45.87 after tax. What is the tax rate? (%)


What is the area of a shape that that has 8 sides and has 1 , 1 , 8 , 1 , 1 , 3 , 3 and 10 as the lengths of the 8 sides?

maths- urgent

The median of the following incomplete frequency distribution is 10: x= 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 f= 0 , 2 , 5 , 6, 3 , 1 , 2 , Y Calculate the frequency of 8

maths- urgent

The median of the following incomplete frequency distribution is 10: x= 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 f= 0 , 2 , 5 , 6, 3 , 1 , 2 , Y Calculate the frequency of 8

Maths urgent

Solve.√(2)sec(x)+tan(x)=1 0≤x≤360

Chemistry- URGENT please HELP

NH4NO3(s)+H2O(l)→NH4NO3(aq) ΔH = +25.7 kJ. What is the final temperature in a squeezed cold pack that contains 49.0g of NH4NO3 dissolved in 125 mL of water? Assume a specific heat of 4.18J/(g⋅∘C) for the solution, an initial temperature of 28.5∘C, ...


sin x / 1-cosx is equivalent to: sin x / 1 + cos x Is this right?


I can't figure out this math problem: 76 is what percent of 15!!!! Need help! URGENT!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

URGENT math rate of change

What is the horizontal change between the points (-2, 5) and (4, 10)?


x is to 6 as 0.8 is to 1.5 How do I write a proportion with that? (proportion such as eg. 14/105=x/315) is it x/6=0.8/1.5 or is it x/0.8=6/1.5 Urgent!!

Math- urgent

What is (6.91 x 10-2 power) + (2.4 x 10-3 power) ? Express your answer in scientific notation.

VERY, VERY URGENT 4TH GRADE MATH!!!!!!!!!!!!!!!!!!

What is 44 divided by 7 with a remainder?


Can somebody help me find a site for a FREE English-Cebuano translation??? Urgent please!!!


What are some problems children face at school and in general as students


CAN ANYONE PLEASE HELP ME I HAVE NO CLUE WAT TO DO AND I AM SO CONFUSED HELP ANYONE PLEASE 4x-5y=-19 2x+17=y what is the solution of the system?

Nath(Urgent Please check)

1)Complete the identity sec Q - 1/sec Q Does this equal -2tan^2Q?

Social Studies Urgent

how do democratic governments and socialist governments maintain power? please help and thank you


URGENT, Please answer this question: give the value of: Tan(Arctan x+1/x-1+Arctan x-1/x)


About sequences.... (i) 32, 25,18,11,4 ____(Answer?) (ii)1,3,6,10,15 ____ (iii) 1,3,9,27,81 (iv)64,16,4,1,1/4(this is NOT a typo!)

Math - Factorising

Find the quotient and the remainder in the following. a). x^4 + 3x^3 + 5x^2 - 6x - 8 is divided by x + 2 b). 2x^4 - 3x^3 + 6x^2 - 5x - 4 is divided by 2x - 3 Please help, this is urgent. Thanks.


find the value of x or y so that the line through the points has the given slope. (12,y) and (15,-8); slope: 2/3


Let ABCD be a parallelogram. Let M be the midpoint of AB and N be the midpoint of AD. Diagonal BD intersects CM and CN at P and Q respectively find PC/BD.

Urgent Math

Please solve it in step by step. integrate: ∫(cot2x-csc2x)^2 dx

Urgent Math

Integrate it in step by step applying integration by partial fraction. ∫(x^3)/(x^2+1)dx

URGENT - Vectors

At what angle should be adjusted the two vectors to have the same value of their //A+B// and //A-B//?

Chemistry URGENT

Could someone let me know if I have balanced these equations correctly. balanced equation of the reaction of iron and oxygen to produce iron(ii)oxide. 2Fe + O2 = 2FeO Also if the balanced equation of the reaction of iron and oxygen to produce iron(iii)oxide. 4Fe+302 = 2Fe2O3 ...

CALCULUS-URGENT- no one will respond!!!

find the radius and interval of convergence for the series the series from n=0 to infinity of ((-1)^n*x^n)/(n+1)


If vector |a| = 12 cm, |b| = 13 cm, and the angle between them when placed tail to tail is 35°, find a • b to the nearest centimetre a) a • b = 57 b) a • b = 8 c) a • b = 11 d) a • b = 24

Physics - Urgent

Which characteristic of matter does the Standard Model not deal with? (hint: it does deal with charge, for example)


Small molecules are combined to form large molecules by the life function of... please help!! URGENT!


compute the discriminant of the equation.What does the discriminant indicate about the kinds of solution? 7xsquared=2x-5


Add (9.3x10^3) + (9.3x10^4) + (0.011x10^6) using correct significant figures?


Urgent Help - I need to translate this sentence into Latin There is nothing new under the sky

z scores URGENT

The whole class averaged 12 on their assignments with astandard deviation of 3. If Jade averaged 6, then her z- score was

Math- urgent

If slope= 4;(3,8) what would be the equation in point-slope form? Please show your work.

urgent (physics)

A certain planet is located 3.54 x 10^11 m from its sun. If its orbital period is 4.9 x 10^7 s, find the mass of its sun.

Linear Algebra - urgent!

A is a diagonalizable matrix. It has the characteristic polynomial det(lambda*I-A)=(lambda-c)^n. Prove that A=cI.

Very Urgent Help Here (Math)

Please solve it step by step. Integrate: ∫(x^2/(√(x^2+1))dx

Math urgent homework

A book is advertised at $500 with an inclusive 5% GST. What is the original price of the book?

statistics Urgent please!!!!!!!!!!!!!!!!!!!!!

A sample of n = 5 scores has a mean of M = 12. What is ‡” x for this sample?

Urgent Spanish Help

How are the I and E in Spanish similar, also how are they different to the I and E in English?


-9-6(w+5) Simplify this expression A. -15w+5 B. -15w+30 C. -6w-39 D. -6w+21 Is the answer C?

Urgent Math Help

Solve for x: 1.) ln√x-8=5 2.) log2x+log2(x+2)=log2(x+6)

Urgent physics help

Can you add a displacement vector and a velocity vector?


Four consecutive integer numbers add to 2. What are the numbers?

Critical Thinking( Urgent)

How would I refute this sentence please? Mike Smith should not be a presidential candidate.After all, he has never held office.

Urgent Chem Help someone plz

Calculate the mole fraction of the solute in the following aqueous solutions 3.25% ethanol, by volume (d= 0.993 g/ml ; pure C2H5OH, d= 0.789 g/ml )

Socials Studies Project (URGENT)

Researching the Northwest Coast people. I need help with finding info on agriculture, nomadic, hunters, fishers. Thank you very much!!

English (Urgent)

How many Native Americans are here inn the world now? I did a google search, but I can't find my answer still, so can anyone please help me out wih this question? Thanks.

GEOL12 (urgent)

i have one simple question i need answering. Is the internal structure of a Composite, Cinder Cone, and Shield volcano are the same? please help and thank you

geology (urgent)

i have one simple question i need answering. Is the internal structure of a Composite, Cinder Cone, and Shield volcano are the same? please help and thank you

Science (urgent)

Hi I really need to know this I've asked a couple times but haven't gotten an answer yet. In the reaction X + Y ® Z, Z is the A) substrate. B) product. C) enzyme. D) carbon molecule.

Science urgent

A.) Show how vertical multiplication can be used to do a charge balance if Zn2+ combines with Cl- b.) Write the chemical formula name for the compound that would be formed


Sohini bought 400 eggs at Rs 8.40 a dozen. At what price per hundred must she sell them so as to earn a profit of 15 percent? Give me the solution of it. Urgent**


The mid-point of the straight line joining A(4,-3), B(6,-2) is located at C. (a) Calculate the coordinates of C. (b) Verify your result by calculating the distances AC and BC and showing they are equal.

English help urgent

Why are the outsides of the buildings in Philbert Place so darkened ? London weather is foggy. <<my choice They were once attractive. They are stained with soot. The area is too crowded.

Chemistry Urgent

Consider the following problem: Target: 2NOCl(g) ? N2(g)+ O2(g)+Cl2 (g) ?Hrxn= ? Steps: 1. 1/2 N2(g) + 1/2 O2(g)? NO(g) ?H= 90.3 kJ 2. NO(g) + 1/2 Cl2(g) ? NOCl(g) ?H= -38.6 kJ As you determine the ¥ÄHrxn value for the target equation above, what must be done to step 2? ...

fractions URGENT!!!!!!!!!!!!!!!

Is 2/3 the smallest out of 1/3? Are you asking if 2/3 is smaller than 1/3? If that's your question, the answer is no. If that's not your question, please rephrase so teachers will understand. Thanks. =)


I need urgent help finding good history websites for information on government during the turn of the century

urgent maths

91 5-digit number are written on the board, how do u PROVE that there are 3 numbers on the board that the sum of the digits are equal?

Algebra (URGENT!)

Can you help me with this problem: Find a formula for the distance from the point (X1, Y2) (The numbers next to X and Y are like X sub 1, Y sub 2...)

French Cuisine (urgent)

What was food like before and after the French Revoltuion. And why did it change? can someone help me please? thank you.

Algebra 2 URGENT

How much water must be evaporated from a 300 L tank of 2% salt solution to obtain a 5% solution?

Calculus - urgent

Find the dimensions of the largest cylinder that can be inscribed in a cone of fixed height H and fixed radius R

Physics Urgent!!!!!!

We consider an ideal gas of molar mass M = 16 g/mol at +10oC. What is the pressure of the gas if its density is 1.16 kg/m3 ?


Differentiate. g(x)=(x^3+1)(3x^2-1) I know that the answer is 15x^4-3x^2+6x but I donot know how to get to this. I was using g'(x) X h(x) + g(x) X h'(x) and I was using the derivatives 3x^2 and 6x but I guess this is wrong. Please help!! Thank you.

Commerce (URGENT!!!)

Name one right and one responsibily. Suggest some examples of these rights and responsibilities.

math **urgent**

using 100 ft of fence material and building a regular octagon garden, what is the area of the garden?

urgent math

without graphing, find the vertex, the azis of symemtry, and the maximum value or the minium value.

Trig Help (URGENT)

Solve over the indicated interval: 2sin^2x=sqrt2sinx , [-180,180) don't how to get x by itself please help and thank you

Math -Urgent!!!

List all the possible rational zeros of f(x)=3x^3-x^2+2x=2. Please help me. I don't understand how to do this. Can someone show me please.

math URGENT!!

a rectangular box measures 4 by 5 by 2 meters. what is the length of the longest pole that can fit into the box?

Math please help! Urgent

Find the height of an equilateral triangle with sides of length 6 cm ' please show ur work


The prime factorization of 243 is 3*3*3*3*3. Write 243 as the product of two powers of 3 in as many ways as possible. Thank you

math (urgent,please answer)

What are some examples of two sets of related data with 10-25 data points each?

math (Urgent, please answer)

What are some examples of two sets of related data with 10-25 data points each?

maths -urgent

The sum of two opposite angles of a parallelogram is 150 degree .find the measure of each of its angles.


Urgent. Please remove thread asap. English Sam, Monday, October 21, 2013 at 5:50pm Thank you


EDXers!!! Plz help with MITx 8.01x I don't know how to solve HW8 Problem 3 Question c) Can anybody help me???? Explain Plz


Why is Biochar an efficient way to store carbon? *Biochar is basically rich soil with charcoal*


A hospital nursery has 3 boys and some girls. A child was selected at random what is the probability that the child is a boy?


Please!!! its extremely urgent. i do not need answers, only how to do it A sample of nitrogen gas (N2) kept in a container of volume 10.1 L and at a temperature of 20.3°C exerts a pressure of 3.1 atm. Calculate the number of grams of gas present. Round to one decimal place, ...


1. .0025 M tartric acid completely reacts with .0030 m of al bicarbonate if .913 l of co2 forms at 298 k with pressure of 1.4 ATM how much base used? 2. 3.1 x 10^23 molec of .0035 m hydriodic acid reacts with 25 g of magnesium bicarbonate how much carbon dioxide if at stp? 3. ...

Another Algebra (urgent!)

Find A if the graph of the equation Ax + 3y = 5 is parallel to the graph of 5x - 2y = 4 I tried to solve the problem, but I couldn't really get a good answer. Thanks!


If a cube with edges of 1.000 cm weighs 25.68 g, what would the mass of a cube of the same material with sides 2.63 cm in length be?

Maths (URGENT)

FIND THE POSITION AND NATURE OF THE STATIONARY POINT ON THE CURVE Y = 3x^5 - 10x^3 +15x Can you find dy/dx and can you simplify it please.


Find u X v, where Q is the angle between u and v. magnitude of u =4 magnitude of v=10 Q=2pi/3 The Q is the part that is throwing me off. I do not know where to start.


determoine whether the equation defines y as a function of x y= the square root of(-3x-6) please please show work

Math 111 URGENT

Find the vertical asymptotes of the following function: f(x)={x-3}/{(x-3)(x^2-4)}. The equation(s) of the vertical asymptote(s) of f is/are___ & ____

Solving trig functions! urgent please help!

1.2sinxtanx + tanx-2sinx-1=0 2.6tan^2x-4sin^2x=1 Both functions is for 0<x<2pi thank you!

math need help urgent

find the domain f(x)=x/x-8,g(x)=-7/x solve the following exponential equation equation exact answers only 3e x-1 = 2+e^x-1

math need help urgent

find the domain f(x)=x/x-8,g(x)=-7/x solve the following exponential equation equation exact answers only 3e x-1 = 2+e^x-1


Write the calculator key sequence you would use to evaluate each expression. Then evaluate. A.) (1-3)^4/4 B.) (-2)^0+4*17^0 C.) 16-9 (2^3)+(-4)^2 Thank you and I pleeeeese explain how to do this




Find all values of x such that sin 2x = sin x and 0 x 2π. (List the answers in increasing order.) x= x= x= x= x=

Biology - very urgent

Is respiratory control more sensitive to small changes in arterial PO2 or in arterial PCO2?

History Help: Urgent Please

What personality traits did the coureurs de bois exhibit that were similar to traits of later French immigrants?


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