# chemistry! URGENT

60,378 results, page 7

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

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

### math VERY URGENT+IMPORTANT

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, ...

### Math(Urgent!!!)

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

### Math

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)?

### Math

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?

### translation

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

### REALLY REALLY URGENT

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

### URGENT ALGEBRA

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

### Trig

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

### MATH-IN URGENT NEED OF HELP!

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.

### Math- URGENT

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

### GEOMETRY - URGENT! HELP!

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//?

### 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)

### URGENT! Calc

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)

### biology

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

### Precalculus(URGENT)

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

### Math- URGENT PLEASE

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

### Latin

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?

### 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 ...

### 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?

### Math! URGENT

-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?

### URGENT

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

### math

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**

### MATHS URGENT PLEASE HELP

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. =)

### history

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 ?

### Math(Urgent)

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

### MATH URGENT

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.

### English

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

### physics(URGENT!!!!!)

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

### Ecology*Urgent*

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

### Urgent!

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?

### Chemistry

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, ...

### SUPER URGENT-- CHEMISTRY

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!

### CHEM URGENT!!

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.

### Pre-Cal(urgent)

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.

### Precalculus(URGENT)

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

### MATH URGENT

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

### GEOMETRY BETWEENNESS URGENT !!

POINTS H, I , AND J ARE THREE POINTS ON A LINE WITH COORDINATES -4/5, -1/SQRT5 AND -1/10. WHICH POINT IS BETWEEN THE OTHER TWO ?

### math URGENT

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?

### math urgent

let V=R^3 and S={u1,u2,u3}=[1;2;0],[1;0;0],[1;0;1] These are three vectors 1 by 3 use gschmidt to obtain an orthogonal basis and then find the coordinates of x=[1;2;3] relative to this basis.

### math

A newspaper vendor sells newspapers at a commission of 6%. He earns rs 75 per day. what is the cost of newspapers? /////////***vvvv.urgent****////////