a certain reaction has the following generaln form

73,810 results, page 83

Chem

1) Mg + F2 = MgF2 10.00 grams of magnesium reacted with fluorine to produce MgF2 Find : a) Balance the reaction b) How many grams of fluorine reacted with magnesium. Answer:____________ c) How many grams of MgF2 were formed in the reaction. Answer:____________

chemistry

I want to make sure I am correct in classifying whether the following properties of hydrogen are chemical or physical. thanks 1. hydrogen will burN in in oxygen to form water. CHEMICAL 2. hydrogen does not support combustion. CHEMICAL 3.hydrogen is usually found combined with ...

Chemistry

Back again with another problem :) How do you calculate the enthalpy change, in kJ/mol for the reaction of copper(II) sulfate? 0.0210 mol of copper sulfate was added to 25 cm3 of water. The temperature increased by 14°C. The specific heat capacity of water is 4.18 J k-1 g-1 ...

calculus

Sorry to post this again, but I am still unable to understand it and need help. Please help.1) Using 3(x-3)(x^2-6x+23)^2 as the answer to differentiating f(x)=(x^2-6x+23)^3/2, which I have been able to do, I need to find the general solution of the differential equation dy/dx...

Chem

Calculate ΔG at 25°C for the precipitation of lead(II) chloride from mixing 100. mL of 0.025 M lead(II) nitrate solution with 100. mL of 0.15 M sodium chloride solution. The ΔG° for the reaction at 25°C = −27.36 kJ/mol. (Hint: write out reaction equation...

American gov

16. What ruling did the Supreme Court make regarding flag burning in Texas v. Johnson? (1 point) It is legal to burn flags other than the U.S. flag, but burning an American flag is not free speech because it affects public morale. Burning any sort of flag is a form of ...

Philosophy

The following argument appeared in the draft of a bill before the Louisiana State Legislature in 2001: Whereas, the writings of Charles Darwin, the father of evolution, promoted the justification of racism, and his books On the Origin of Species and The Descent of Man ...

Philosophy

The following argument appeared in the draft of a bill before the Louisiana State Legislature in 2001: Whereas, the writings of Charles Darwin, the father of evolution, promoted the justification of racism, and his books On the Origin of Species and The Descent of Man ...

ALGEBRA

Do I place the following two equations on the same line as they both represent the same lines. Pleas show. Thanks much. 3x-2y=8 6x+4y=16 I am sorry I am not too big on graphing. no they are not the same line. because if you had reduced 6x+4y=16---> you would get 3x+2y=8 ...

World History Honors

What exactly is this assignment asking me to do? lol i don't get the "dig" part. i actually don't understand anything. ------------------------------------ Write a 550-word comparative “dig”—named for digging further into one of the following subjects that we have ...

science help PLS

When Jane visits a beach, she notices a sea stack has formed offshore. Which of the following best describes what caused the sea stack to form? Erosion hollowed out the rock in a seaside cliff. Deposition moved sand from the beach into an offshore pile. A large number of ...

Algebra one, help me please?

Okay so, I have to write an equation in standard form, of a line that passes through the given point and has the given slope, ( M) or that passes through the given points. Heres what I think: 1)( 4,-1) M= 3 So, it's in y=3x+B and then, I would plug in -1 for y, and 4 for x. So...

Environmental Science

Here is a sentence that says: In bodies of water polluted by phosphorus, algae can form large floating mats, called algal blooms. What substance causes an alfal bloom to form? (I don't understand the sentence) That's "algal bloom" See: http://en.wikipedia.org/wiki/Algal_bloom

Chemistry

One mole of carbon (12.0 g) in the form of crystalline graphite is burned at 25 ◦ C and 1.000 atm pressure to form CO2(g). All of the heat produced is used to heat a 4560 g bath of liquid water, originally at 25 ◦ C. What is the final temperature of the water...

chemistry

Consider an electrochemical cell based on the reaction: 2H+(aq) + Sn(s) = Sn2+(aq) + H2(g). Which of the following actions would NOT change the measured cell potential? lowering the pH in the cathode compartment addition of more tin metal to the anode compartment any of the ...

chemistry

Consider an electrochemical cell based on the reaction: 2H+(aq) + Sn(s) = Sn2+(aq) + H2(g). Which of the following actions would NOT change the measured cell potential? lowering the pH in the cathode compartment addition of more tin metal to the anode compartment any of the ...

math - slope-intercept

How do I write one equations in slope-intercept form, and three other lines in slope-intercept form that are perpendicular to the first line ?? for ex. If I pick the equation y=2/3x+4 for the first equation. and for the second line , the slope -2/3x +4 , how about the 3rd and ...

Chemistry

Consider the following reaction AgNO3 (aq) + NaCl (aq) → AgCl (s) + NaNO3 (aq) DH = -66 kJ Suppose that 100.0 mL of 0.100M AgNO3 is added to 200.0 mL of 0.100 M NaCl in a coffee cup calorimeter. Assuming that the initial temperature of the solution is 25.000C calculate ...

Social Studies

Which of the following statements best describes a federal system of government? Independent states form an alliance and give up clearly defined and limited powers to a national government. The national government holds all power, creating and abolishing local governments as ...

chemistry

N2(g) + 3 F2(g) → 2 NF3(g) ΔH° = –264 kJ/mol ΔS° = –278 J/(mol∙K) a. calculate the maximum amount of non-PΔV work that can be accomplished through this reaction at a temperature of 500°C. b. Determine the temperature at which the equilibrium ...

science(chem)

If these compounds are shaken in a test tube for 10-20 sec will they form a miscible (1 layer) or immisible (form 2 layers)? a) water and ethyl alcohol miscible b)water and dimethyl ether miscible c)water and methylene chloride immisible d)water and hexane immisible e)Hexane ...

Psycholofgy (Please Help)

Social influence ranges in intensity from the gentlest form _______, which involves changing one's behavior just because other people are nearby, to the strongest form _______, which involves changing one's behavior because you are forced to. I choose C a. mere presence; ...

8th Grade math PLEASE CHECK MY ANSWERES

1.Write the number in standard form: 7.1x10^4 A)710 B)7,100 C)71,000 D)710,000*** 2.Write the number in standard form: 5.01x10^-3 A)5,010 B)0.501 C)0.0501 D)0.00501*** 3.Multiply (2.0x10^4)(3.0x10^3)=? A)6.0x10^7*** B)6.0x10^12 C)6.0x10^5 D)6.0x10^43 Add. (7.0x10^6)+(2.0x10^6...

physics

1. A force of 720N stretches a certain spring a distance of 15 cm. What is its force constant? If a 60-kg mass is hung on it, how far will it stretch?

Digital Logic

The input voltage to a certain op-amp inverting amplifier is 10 mV, and the output is 2 V. What is the closed-loop voltage gain?

calculus

Show that the curves (y= √2sinx) and (y=√2cosx) intersect at right angles at a certain point with 0<x<π/2

Physics

Light of wavelength 550 nm in air is found to travel at 1.96 x 10^8 m/s in a certain liquid. Determine the index of refraction of the liquid.

English

I'm writing my english on theme for a certain novel. What would be a good topic sentence to start my introduction off with?

Chemistry

A certain radioactive element has a half life of 1 h. If you start with a 1-g sample of the element at noon, how much is left at 3:00 PM? At 6:00PM? At 10:00 PM?

chemistry

10.0 mg of a certain protein were dissolved in water to make a solution of 3.50 mL at 28.0o C. If the osmotic pressure is 1.30 torr, what is the molar mass of the protein?

physics

The motion of a certain simple harmonic oscillator is described by: x(t) = (12 cm) sin [(1 s ^(-1)) t] What is the earliest time t > 0 or t = 0 at which the oscillator's velocity is zero?

Calc

A certain item sells for $30. If the cost of producing this item is given by C = .05s^3 + 100, find the marginal profit when x = 10.

chemistry

When a certain amount of MgF2 is added to water, the freezing point lowers by 3.5 oC. What was the molality of the magnesium fluoride? (Kf for water = 1.86 oC/m)

Chemistry

A student measures k for a certain blue dye to be 19.4 M^-1 at 560 nm. What is the molarity of the dye in a solution with an absorbance of 0.118 at this wavelength?

maths --plse help ..sumebudy help me to solve this

On a certain sum, Compound interest is Rs41 and Simple interest is Rs 40. for 2 years. What is the rate p.a.?

calculus

In a certain city the temperature (in degrees Fahrenheit) t hours after 9am was approximated by the function: T(t)= 70 + 19sin((pi*t)/12). What is the temperature at 3 pm?

physics

1. A force of 720 N stretches a certain spring a distance of 15 cm. What is its force constant? If a 60-kg mass is hang on it, how far will it stretch?

physics

The half-life of a certain radioactive isotope is 32 hours.What fraction of the sample would remain after 16 hours?(a)0.50(b)0.25(c)0.62(d)0.71

Chemistry

Using atomic masses, If a certain batch of D2O has a purity of 99.75 weight %, what is its purity in atom (actually molecule) %

Chemistry

In certain first order reactions the concentration of the reactant decreases from 0.15 M to 0.11 M in 36 minutes . calculate the time of half reactions

physics

In a certain right triangle, the two sides that are perpendicular to each other are 3.80 m and 8.10 m long. What is the length of the third side of the triangle?

physics-lenses

a certain Galilean telescope has a magnification of 2 times. if the focal length of the objective lens is 60 cm, how long is the telescope? thanks :))

chemistry

equilibrium constant = 55.3 @ certain temperature H2 (g) + I2 (g) <=> 2HI (g) (reversible) If you start with 0.195 M hydrogen iodide, what will the concentrations of H2, I2, and HI be at equilibrium?

chemistry

A 4.70 g sample of a certain gas occupies 530. mL at STP. What mass of the same gas is present in a 1.15 L container at 40.5°C and 785 mm Hg?

physics

a certain hamornic motion has amplitude of 0.7m and a period of 1.3s.find(a)the frequency of oscillation(b)the maximum velocity(c)the maximum acceleration

chemistry

if the average speed of a helium atom at a certain temperature is 1130. m/s, what is the speed in miles per hour? (1 mi =1609m)

maths

A sum of mone becomes 8/5 of itself in 5 years at a certain rate of simple intrest.find the rate ofintrest

Strayer

A certain test is worth 125 points. How many points (rounded to the nearest point) are needed to obtain a score of 85%?

calculus

Cost of a Commodity. The price p, in dollars, of a certain commodity and the quantity x sold. Obey the demand equation. p= -1/5x+200

physics

The length of the B string on a certain guitar is 60.0 cm. It vibrates at a fundamental frequency of 246.0 Hz. What is the speed of the transverse waves on the string?

Math

A certain medicine requires 5 mg per 30 kg of weight.  How much medicine is required for a patient that weighs 271 pounds?

science

A certain conductor has a risestnace of 5 ohms at 0oC. if the temperature coeffiecient is 0.002/0oC, find its resistance at 2000oF?

math

A sum of money becomes 85 of itself in 5 years at a certain rate of interest. The rate percent per annum is :

MATHS

The compound interest on a certain sum for 5/2year at 5%per annum compounded annually is rs416.20.find the sum

AP Chem

A lab manual states that to prepare a certain buffer requires mixing 25 ml of 0.200 M HClO (Ka=3.00 x 10^-8) with 50 ml of 0.2 M NaClO What is the Ph of this buffer?

Finance

Suppose a new company decides to raise a total of $200 million, with $100 million as common equity and $100 million as long-term debt. The debt can be mortgage bonds or debentures, but by an iron-clad provision in its charter, the company can never raise any additional debt ...

math

in what time a certain sum will become 3 1/4 time at 5%?

algebra

Please help I have tried this question so many times: I cannot type out the exponents because my keyboard does not allow so I'll have to write it in verbal form I'm sorry. What is the simplified form of -9 m to the power of negative two times n to the power of 5 times 2 m to ...

Trigonometry

Every point (x,y) on the curve y=log(3x)/log2 is transferred to a new point by the following translation (x′,y′)=(x−m,y−n), where m and n are integers. The set of (x′,y′) form the curve y=log(12x−96)/log2. What is the value of m+n? ...

chemistry

hi, Im not sure how to explain this well but here goes. Im doing a oxidization/reduction reaction to determine the charge of an element. charge is n formula n=a/b Problem: 0.6215 g sample of nickle metal was dissovled in 100.0ml of fe 3+ Note for the formulas: I put all the ...

AP CHEM

Please help me with thses AP CHEM homework problems and show the steps to how to find the solutions: Solid Liquid Titrations: Determine the concentration of the indicated liquid unknown given the mass of a solid standard and the buret data for the titration. #35) What is the ...

chemistry

An indicator has the reaction Hln(aq) ↔ H+(aq) + In-(aq). Explain how the indicator can change color when a strong base is poured into a solution of this indicator. Will a strong base dissociate? Which way will this cause the reaction to shift? Is there more or less HIn...

Psycholofgy

Help is needed! Please help! Social influence ranges in intensity from the gentlest form _______, which involves changing one's behavior just because other people are nearby, to the strongest form _______, which involves changing one's behavior because you are forced to. I ...

Psycholofgy

Help is needed! Please help! Social influence ranges in intensity from the gentlest form _______, which involves changing one's behavior just because other people are nearby, to the strongest form _______, which involves changing one's behavior because you are forced to. I ...

math

2. A candy machine has 10 grape, 6 green apple, and 16 mango gumballs. What is the probability of selecting a grape and a mango gumball as fraction in simplest form and a percent? P(A and B) = P (A) * P (B) 10/32 * 16/32 = 80/512 = 5/32 simplest form Percent: 15.625% The ...

Chemistry

Aspirin, C9H8O4 , is produced through the following reaction of salicylic acid, C7H6O3, and acetic anhydride, C4H6O3: C7H6O3(s) + C4H6O3(l) ---> C9H8O4(s) + HC2H3O2(l) A. What mass of aspirin (kg) could be produced from 75.0 mol of salicylic acid? B. What mass of acetic ...

Economics/Algebra

Can someone help with the following: I know how to get the MC and AC; however I'm not sure on the algabraic part. Given the following short-run total cost function, answer the following questions. TC = 3q2 + 5q + 300 a. Find the marginal and average cost functions. b. Show ...

Chemistry

Help needed with a calorimeter lab. I have to measure the enthalpy of a neutralization reaction between NaOH and HCl as well as find the concentration of NaOH the following ways. - using the mass and volume of NaOH - Using calorimetric data assuming no heat lost to calorimeter...

science HELP ASAP!!!!!!!

1. in which biome would you find the main types of plants life to be grasses and nonwoody plants? (1 point) 2. Which of the following determines the type of biome classification that will be made for a particular region? (1 point) 3. which of the following do rainforest and ...

enviromental

Completely mixed flow ractor CSTR and plug flow reactor (PFR) may have significantly different efficiencies depending on the reaction order. This problem asks you to compare the relative reactor sizes required to ensure 99.0 % removal of wastewatwer pathogens. Wastewater from ...

Geography

Which of the following most accurately describes the difference between climate and weather? (1 point) Climate refers to long-terms conditions; weather refers to daily conditions. Climate refers to severe weather events; weather refers to precipitation. Climate refers to land ...

Algebra 2

I am trying to factor a 4th degree polynomial that does not have any rational roots. I need to somehow get it factored into two quadratics. Anyone know of a method to use. 3x^4 - 8x^3 - 5x^2 + 16x - 5 Two of the irrational roots are 1.135.. and 0.382.. but that won't help you ...

Language

What is the superlative form of "often"? most often ? I'm not 100% sure but if i can remember i believe that the superlative of often is: amoftesten (the o has the two dots on top) because the comparative would be: ofter (with the o having the two dots on top) if you mean in ...

Chemistry

Which of the following compounds are soluble? Choose at least one answer. a. BaSO4 b. K2SO4 c. KBr d. NaOH e. Al(OH)3 I originally thought it was the last four, but it isn't, or it isn't only/all of them. Aren't all sulfates and potassium soluble? What are the reactant ions in...

LA - 1 question

Read the following stage directions and dialogue from Billy Elliot: [Billy suddenly sees DAD and freezes. His reaction puzzles Mrs. Wilkinson for a second. The music comes to a standstill. Mrs. Wilkinson turns to see Dad.] DAD: You.Out.Now What do these directions and dialogue...

geometry

If two lines are perpendicular, then the two lines form right angles. If lines Imported Asset and Imported Asset are perpendicular, then they form right angles. If two lines are perpendicular, then the two lines form right angles. Therefore, since lines Imported Asset and ...

Business/Finance

Your credit card: a) Is a form of demand deposit b) Is a form of time deposit c) Is an asset d) Has all the functions of money So from my understanding, credit cards are not an asset, since they do not store value, can't be sold or given away. Hence they also do not have all ...

chemistry

Create balanced equation, given the two compounds in aqueous solution may react with one another. State whether or not a chemical reaction occurs. Make sure to include the state of each reactant and product. If a precipitation reaction occurs, provide the ionic and net ionic ...

math

type of cd/dvd- number ---------------------------------------------------------- rock CD 26 ---------------------------------------------------------- pop CD 17 ---------------------------------------------------------- comedy CD 11...

writing

Is there someone who could proofread this? Identify the sentence patterns 1. He followed the map to the treasure. S/V/DO 2. Darcy sang the song slowly. S/V/DO 3. They were certain about the time. S/LV/SC 4. I called him a sucker. S/V/DO 5. I found the puppy a home. S/V/DO 6. ...

structural formulae

REACTION 1 IS A CARBON COMPOUND CONTAINING AN ALCOHOL FUNCTION GROUP + REACTION 2 IS A CARBON COMPOUND CONTAINING A CARBOXYLIC GROUP. IM TRYING TO UNDERSTAND THE PRODUCT FORMULAE. CAN YOU TELL ME HOW THESE TWO FUNCTION GROUPS REACT, AND THE RELEVANCY OF CH IN THIS EQUATION ...

algebra

A school fair ticket costs $8 per adult and $1 per child. On a certain day, the total number of adults (a) and children (c) who went to the fair was 30, and the total money collected was $100. Which of the following options represents the number of children and the number of ...

CHEMISTRY

Hello, I am having trouble balancing this redox reaction WITHOUT using the half-reaction method. I believe this is because not all of the elements are in (aq). BrO3-(aq) + N2H4(g) --> Br-(aq) + N2(g) Br is reduced by a factor of 6. N is oxidized by a factor of 2. I will ...

Chemistry

Yesterday we combined Hydrochloric Acid HCl with Sodium Hydroxide NaOH in a violent reaction that resulted in water H2O and common table salt NaCl. How many grams of hydrochloric acid should we use so we have exactly enough to react with 40g of sodium hydroxide? You'll need to...

Psychology

Help is needed! Please help! I said the answer is C Social influence ranges in intensity from the gentlest form _______, which involves changing one's behavior just because other people are nearby, to the strongest form _______, which involves changing one's behavior because ...

Science

Why is it that milk sours so fast. I had googled it and false imformation has came up. I have to write a 3 page essay about how certain things sour too quickly.

Honors Chemistry

Absorbance spectroscopy relies on the fact that specific molecules can only absorb certain wavelengths. Explain how this could be used in a)microwaves and b) astronomical discoveries/interpretations. Thank you for any help with this... :)

statistics

in a certain survey 1,043 adults, 81% reported having more than one television at home. find the actual number of respondents corresponding to the given percentage?

answer

One of the reasons that certain advertisements are successful is because viewers want to behave like those they observe. What is the general term that psychologists use to describe this type of behavior?

Math

In a certain survey of 1034 adults, 89% reported having more than one television at home. Find the actual number of reespondents corresponding to the given percentage

Physical Science

The string of a certain yo-yo is 80 cm long and will break when the force on it is 10 N. What is the highest speed the 200 g yo-yo can have when it is being whirled in a circle? Ignore the gravitational pull of the earth on the yo-yo.

Physical Science

The string of a certain yo-yo is 80 cm long and will break when the force on it is 10 N. What is the highest speed the 200 g yo-yo can have when it is being whirled in a circle? Ignore the gravitational pull of the earth on the yo-yo.

Calculus-help~

A certain fast food restaurant wants to determine the increase in revenue per cheeseburger if sales are $45,000. Let the function [p=(120000-x)/(30000)] represent the price of x cheeseburgers.

physics

Electrons move through a certain electrical circuit at an average speed of 1.7 x 10-2 m/s. How long (in minutes) does it take an electron to traverse a 1.8 -m light bulb filament coil?

Prob&Stat

If 52% of the customers at a certain grocery store regularly use coupons, what is the approximate standard deviation of the sampling distribution of the proportion for samples of size 240? 2.1% 3.2% 4.7% 10.4%

math

on a certain day the propellers complete 20 revolutions per minute and have a speed at of 45 m/s calculate the radius of a propeller to one decimal place using pie as 3.14 ?

criminal justice

In 1970, the District of Columbia passed the first __________ statute which authorized denial of bail to "dangerous" persons charged with certain offenses for up to 60 days.

Social studies Florida

Cross words: question , when one group chooses not to buy a certain product or service usually a tactic to get a benefit previously decided.

MATH

A certain fast food restaurant wants to determine the increase in revenue per cheeseburger if sales are $45,000. Let the function [p=(120000-x)/(30000)] represent the price of x cheeseburgers.

Chemistry

Currently studying for an lab exam. Just have a few question about a typical Iodine Clock reaction lab. In an typical Iodine Clock reaction lab what would be the state of effect of an increase in the initial concentration of persulfate ion (S2O3 2-) and the increase in the ...

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