# CHM formula needed, pls?

20,409 results

### CHM formula needed, pls?

How many milliliters of a 0.25 M sucrose solution contain 2.0 grams? The molar mass of sucrose (C12H22O11 ) is 342.3 g/mol.

### CHM 152

At 20oC, a 2.32 M aqueous solution of Ammonium Chloride has a density of 1.0344g/ml. WHat is the molality of Ammonium Chloride in the solution? The formula weight of NH4Cl is 53.50 g/mol?? I am not sure how to incorporate the density into the problem to come up with how to ...

### physics.pls help

can you help me to isolate the ''t'' in this formula. d=V1t+1/2at^2 pls help

### org chm

how many grams of KOH are needed to make 590 ml of a solution with a pH of 11.35?

### CHM

In the chemical formula of ammonium sulfate, (NH4)2SO4, how many hydrogen atoms are present? 4

### math help pls pls

How do you solve the formula for the perimeter of a rectangle with width W and L length for the length p=2w+2L

### physics-pls help

The ball is thrown froma height of 10 meters with an initial upward velocity of 3.0m/s. How long does it take to land on the ground? What is its maximum height? i know the formula is d=v1t+1/2at^2 but i do not know what else to do. pls help

### science help

How can you describe the location of hafnium (Hf, atomic number 72) on the periodic table? choose all that apply. -Transition metals -noble gases -group 6, period 4 -group 4, period 6 pls help me damon or ms sue pls help me pls pls pls

### lagauge arts

in which sentence is the italicized word a adjective. 1. evening bats feed ( greedily ) on insects. 2. they apear in the sky just ( after ) the sunset. 3. these bats are among the ( smallest ) species. 4. their fingers ( resemble ) those of human hands. Conexus students or ms...

### physics

can you help me to re-arrange this formula. i don't get it. V2^2= V1^2+2ad^2 I want to solve for a pls help

### Math

Can u pls pls pls solve this algebraic expression?? I cant solve it although I tried many possible ways and solutions :/ 10+1/3[4k-(18+7k)]

### science help pls pls

Which of these surface features are formed when the acid in groundwater reacts with limestone? rivers and springs sinkholes and caves hot springs and geysers wetlands and volcanoes is it b pls help me

### math help pls pls pls

Create an example of a polynomial in standard form. How do you know it is in standard form? pls help me

### science

What is carbon cycling? http://www.elmhurst.edu/~chm/vchembook/306carbon.html A thing made out of carbon. It is in a shape like a circle.

### Math! Pls Help!

write a list of steps that are needed to find the measure of ∠B.

### Physical chemistry

A mixture contains n2o4 and No2 in the ratio 2:1 by volume what is the vapour density of the mixture.Pls answer the question i have been on the question for 2 hrs by now tried solving using mole fraction ideal gas equation an using the formula molar mass /2 but still couldn't ...

### physics

Two children on racing bikes start from the same reference point. Child A travels 5.0m/s{right} and child B travels 4.5m/s{right}. How much farther from the point of origin is child A than child B after 5.os? pls I really really need help. I do not understand it and I do not ...

### Chemistry

How much energy in joules does it take to raise the temperature of 255g of water by 12.5 C? I just don't know which formula to use. Every formula I look at has 3 components needed, but I'm only given 2. Thanks :)

### Math

The force E needed to make a machine pull a load is partly constant and partly varies as the load L to be pulled.For a load of 20kg the force needed is 14N while 20N is needed for a load of 30kg find: a)The formula connecting E and L. b)E when L=50kg

### physics

pls what is the formula for calculating period given gravity, mass and length of the material

### chemistry

Pleas does any one know how to calculate the number of isomers of an organic compound. Any formula pls

### math help pls pls pls

Choose the correct simplification of the expression the quantity a to the 2nd power over b to the 3rd power all raised to the 4th power. A. a to the 6th power over b to the 7th power B. b^12 C. a^8b^15 D. the quantity a to the 8th power over b to the 12th power pls help me

### afrikaans (AFK503/101)

Hi there, can anyone pls help me with AFK1503/101 - 2015. I am seeking an English version of this assignment pls, is there an English one available? if there is pls provide me with a website address to get access. Thank you. Tanya

### Physics

A child pulls a wagon along level ground. The handle with which she pulls the wagon makes an angle of 20.0 degrees with the ground as the child pulls with a force of 78.0 Newton. What are the components of the force. Pls pls pls pls help me answer this and may God bless u!

### math help pls pls pls

Consider the functions f(x) = 2x + 1 and g(x) = x^2 − 10. What is the value of f[g(3)]? 39 −3 −7 −1 pls help me

### math (if someone could show me the working pls)

calculate the difference of the square using the following formula a^2-b^2=(a+b) (a-b) 1)28^2-12^2

### Pressure and Molecular Formula

2. How much potassium chlorate is needed to produce 20.0 mL of oxygen at 670 mm Hg and 20 degrees C. 3. A certain compound containing only carbon and hydrogen was found to have a vapor density of 2.550 g/L at 100 degrees C and 760 mm Hg. If the empirical formula of this ...

### math help pls pls pls

Four polynomials are shown below: A. 2 − 2x5 + 2x2 B. 5x3 + 5 − 5x4 C. 3x + 2x5 D. 6x3 − 1 Which of the above polynomials is a 5th degree binomial? Polynomial A Polynomial B Polynomial C Polynomial D pls help me

### science pls help

i posted this earlier but got a confusing answer so pls help as best as u can asap! True or False 1. If a 40 kg person is accelerating at 10 m/s2, then the magnitude of the force acting on him or her is 400 N. (1 point) true false Multiple Choice 2. How much force is needed to...

### chemistry

why can I not use the formula m1v1=m2v2 for the following question: What volume of 1.20 M NaOH will be needed to neutralize 225 mL of 3.0 M sulfuric acid? I get 0.56 L but the answer should be 1.1 L. When am I able to use that formula and when can I not?

### algebra pls pls help

Determine which polynomial is a perfect square trinomial. 49x2 − 28x + 16 9a2 − 30a + 25 25b2 − 45b − 81 16x2 − 24x − 9 is it b pls help me

### chemistry

C4 H10 O or diethyl ether or with a formula of CH3CH2OCH2CH3 its stick structure is H H H H ! ! ! ! .. H-C-C-C-C- O-H ! ! ! ! .. H H H H I used the this ! sign as a sign for bond. pls help me to determine the geometry for each central atom in this structure. 1) C Trigonal 2) C...

### chemistry

In hydrated copper sulfate, the chemical formula is CuSO4.5H2O, while that of hydrated cobalt(II) chloride is CoCl2.6H2O. I want to ask how to determine the number of moles of water is needed to hydrate any salt. Is there a pattern or formula?

### science help pls pls

A scientific law can be best described as an explanation of a specific relationship a series of observations with contradictory data a phenomenon which works under changing conditions a description of specific relationships under given conditions is it a pls help me

### MATH gr10

were having an exam soon, can you list all the formulas needed..pls? i might've missed some, i just want to make shure.

### Algebra

a formula that can be used to find the diagonal length of any paper square and a formula that can be used to find the total number of triangles needed

### science help pls pls

Which of these statements best explains why scientists use models? to allow other scientists evaluate their data to speed up or slow down natural processes to describe and explain non-observable objects and processes to predict the scientific theories which would be proposed ...

### chem

Write the complete ionic equation for Cu(NO3(aq)+K2S(aq)and namd write the formula for the spectator ions in this reaction? This is what I got pls. check it: complete ionic equation: Cu^19aq)+K^1(aq)+S^-2(aq)=K^1(aq)+NO3^-1(aq)+Cu2S(s) net ionic equation: Cu(aq)+s^-2(aq)=Cu2S(...

### science help pls pls

One group of scientists has proposed a new theory on Adaptation. A majority of scientists worldwide agree with the theory. The theory is most likely biased. incomplete. accurate. unchangeable. is it accurate pls help me

### Physics

A stopper tied to the end of a string is swung in a horizontal circle. If a mass of the stopper is 13.0 g, and the string is 93.0 cm, and the stopper revolves at a constant speed 10 times in 11.8 secs, what is the tension on the string? I tried solving this question using the ...

### VARIATION

A rectangular brass slave has a square base of side x cm, and height h cm, its weight, w kg, is given by the formula w=(3x^2 h)/10. How is w changed if x is trebled and h is halved? (with solution pls... tnx...)

### Chem

Dear Dr., What formula is this? En = -Z^2RH/n^2 I saw you use it in one of your explanations. I know its been a few yrs since u last posted it. Pls help thanks! Yours sincerely, Johan

### MANIPULATION OF DNA

can anyone describe to me what this is pls? also can anyone pls explain how dna manipulation works and what it does pls?

### Chemistry

the formula H2O2 is an example of 1.molecular formula 2. an empirical formula 3.an ionic formula 4.an organic formula

### chm I

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. ...

### Algebra help pls

Which ordered pair is a solution of the equation y=4x? A (1,3) B (-1,-4) C (-4,-1) D(1,-4) Can Someone help me solve this pls ?

### chemistry

hi, I am wondering if benzyl acetate is polar or nonpolar? because it has a non polar benzene ring but also it has the ester bit attached so i am confused. Also i cant seem to understand the vander waal forces that are in it. if anybody could help that would be super A little ...

### physics.pls help

How do you know what element is chemically active on the periodic table? PLS HELP

### math help

1/4 divided by 3/8 pls help me im confuss i forgot the ste pls explain

### pre algebra

2x^2 + 8 - 4x + 3x - 6x^2 + 7 what does this simplify to A)-8x^2 - 7x + 15 B)-4x^2 - x + 15 C)4x^2 + x + 15 D)8x^2 + 7x + 15 pls help me reiny steve or damon pls help me

### math pls help me

(-2y + 5 )(y + 3) what would this simplify to? A)-2y^2 + 8y + 15 B)-2y^2 - y + 15 C)2y^2 + 8y + 8 D)2y^2 - y + 8 pls help me steve or damon or ms sue

### math

Pls i want you to teach me the 5 90 lotto formular pls i need it now

### food science

pls give me an idea on the formulation of bavarian cream filling. pls. thank you

### Science(Help NOW, Pls)

wat elements make up water? pls help! i will be very happy if you do! :S

### physics.pls help

Why is it important to asaume that a rope under tension is taut and does not stretch. pls help

### Algebra (variation)

A rectangular brass slave has a square base of side x cm, and height h cm, its weight, w kg, is given by the formula w=(3x^2 h)/10. How is w changed if x is trebled and h is halved? (with solution pls... tnx...)

### science help pls pls

Which of these is the most practical method to prevent global water shortage? Stop planting trees and shrubs in gardens. Conserve, recycle and reuse water in households. Stop using appliances like washing machines and dishwashers. Discourage setting up of power plants which ...

### science help pls pls

Dams are used to produce hydroelectric power. Which of these best describes the impact of a dam on the environment? It causes air pollution. It reduces the level of groundwater. It causes changes in the river ecosystem. It reduces the level of oxygen in river water. is it c ...

### math help pls pls pls

A company is deciding whether or not to hire a new worker. The company must pay the worker hourly and cover a daily cost for insurance. The cost to pay an hourly worker for one day is represented by the function y = 8x + 25, where x is hours. What is the y-intercept, and what ...

### Science(Help NOW, Pls)

organisms in which domain live in every environment? pls help, im stuck on this one. :S

### physics.pls help

A 100g bird sits in its nest. what is the Fnet(net force) in this case? pls help

### (pls help) algebra

4x+y-32=1, 6x-y-4z=7, 10x+2y-6z=5 pls show me how to solve for x,y,z. Ans:xx=1.5,y=-2,z=1

### chem

an energy value of 3.313x10^-19 joules is needed to break a chemical bond. what is the wavelength of energy needed to break the bond? (the speed of light = 3.00x10^10 cm/sec; planck's constant = 6.636x10^-34 J . sec is there a formula i'm missing? Formula (memorize this) ...

### e commerce or marketing, help pls

hi,good evening everyone can you help me on finding a clothing manufacturer resource system??? pls thank you

### Algebra help pls fast

How do you Find the lateral area of a square pyramid. base:8 Height:22. and side:8 Help pls

### Math

Use the quadratic formula to solve the equation. x² - x = -2 Type an exact answer, using radicals as needed. Express complex numbers in terms of i. Use integers or fractions for any numbers in the expression. Use a comma to separate answers as needed.)

### Chemistry

rank the following atoms and ions in the order of expected increasing radius: Ca, Ca2+, Ar Pls pls help me kindly... Anyone?

### PLS HELP ME WITH ONE MATH QUESTION!!???

pllllsssss help me!!!!!!! 5. How many lateral edges are there in a triangular prism? (1 point) 6 3 9 12 I don't know if its 6 or 9 or even 12!!??? pls help asap!!!!!

### Pre-Algebra Help pls fast

How do you Find the lateral area of a square pyramid. base:8 Height:22. and side:8 Help pls

### algebra pls pls help

The equation f(x) = 4x^2 − 16x + 9 represents a parabola. What is the vertex of the parabola? (2, −7) (−2, 57) (4, 9) (−4, −137) is it a pls helpme