a certain reaction has the following generaln form
74,229 results, page 52

Chemistry
Answer the following question about copper (II) sulfate pentahydrate: a)how much water (in g) is there in 10.0 g of the compound listed above? b)If you needed 2.50g of CuSO4 for a reaction but only had CuSO4 * 5H2O available, how many g would you need to use to get the same ... 
chemistry
The rate of formation of C in the reaction 2 A + B > 3 C + 2 D is 2.2 mol/L.s. Calculate the rates of reaction of A and B, and the rate of formation of D. 
Iron and Sulphur reaction
Please give a particle diagram of the iron sulphur reaction 
chem
what effect does concentration have the reaction time and what effect does it have on the reaction rate? 
chemistry
Consider the reaction, 3 H2(g) + N2(g) => 2 NH3(g). How many grams of NH3 will be made by the reaction of 3 moles of H2(g) with 18 moles of N2(g 
Spanish
Please correct my work please: This is what I'm working on: Command form(imperative mood)negative familiar/polite. I have to change the following affirmative commands to the negative form. (write the word no, the object pronoun(s), and the negative command in the spaces to the... 
Chemistry
Cells use the hydrolysis of adenosine triphosphate (aTP) as a source of energy. This reaction can be written as, ATP(aq) + H2O(l) > ADP(aq) + H2PO4(aq), wehre ADP represents adenosine diphosphate. For this reaction, Delta Grxn = 30.5KJ/mol. If all the free energy from ... 
math
How do i write an equation in point slope form of a line that passes through (6,5) and has a x intercept of 3...also how do i make it into slope intercept form 
Physics  Momentum
Try to imagine a situation in which the form f=ma would no apply, but the form f=delta p / delta t could be used. Describe that situation. How could you test your prediction. 
Geometry
In a Aframe house, the two congruent sides extend from the ground to form a 34 degree angle at the peak. What angle does each side form with the ground ? 
medical terminology
The plural form of the medical term phalanx _____ i think its x but that's the singular ending it doesn't give the plural form Im confused, help please? 
chemistry
When two solutions are mixed and a new color is observed, is this color change an indication that a chemical reaction has occurred? Explain. It is not possible to directly observe chemical bonds breaking and forming during a reaction, molecules and atoms are way too small. ... 
chemistry
The ionization constant Ka of an indicator HIn is 1.0x10^6. The color of the nonionized form is red and that of the ionized form is yellow. What is the color of this indicator in a solution whose pH is 4.00? Thanks! 
Physics  application of Momentum
Try to imagine a situation in which the form f=ma would no apply, but the form f=delta p / delta t could be used. Describe that situation. How could you test your prediction. 
chemistry
How many grams of carbon dioxide can form when a mixture of 3.60 g ethylene (C2H4) and 2.70 g of oxygen is ignited, assuming complete combustion to form carbon dioxide and water? 
Chemistry
Most of the matter in the universe is of which element? How and where do elements more complicated than this form? Is this correct? Helium; more elements are form in the sun by nuclear fusion. 
Math
Bob the builder has many sticks of length 3, 5, and 7. He wants to form triangles whose edges consist of exactly 1 stick. How many noncongruent triangles can he form with the sticks? 
math
How do I write one equations in slopeintercept form, and three other lines in slopeintercept form that are perpendicular to the first line ?? Please Help, Thank you =) 
Science
1.00g of oxygen combine with 0.126 g of hydrogen to form H2O. 1.00 g of nitrogen combie with 0.216 g of hydrogen to form ammonia. Predict the weight of oxygen 
Chemistry
The reaction 2NO + Cl2 <==> 2NOCl has Kc= 210 what is the equilibrium concentration of NO in moles per liter given the following Cl2= .46 NOCl= .43M at equilibrium. So far all ive gotten is 210= [.43]^2/[.46][NO]^2 where do I go from here please 
chemistry
in a blast furnace, Iron(III) oxide is used to produce iron by the following unbalanced reaction....Fe2O3(s) + CO(g)>Fe(s)+ CO2(g) if 4.00 kg Fe2O3 are available to react how many moles of CO are needed? how many moles of each product are formed? help please how do i ... 
chemistry
can u help me in this question. The rate of appearance of I2 in aqueous solution, in the reaction of I^ ion with hydrogen peroxide, was found to be 3.7*10^5 mol. L^1.s^1 over time interval. 2H^+(aq)+ 2I^(aq)+H2O2> I2(aq)+2H2O(l) During the same interval,what was the ... 
Physical science
Help Please . Aisha drops an antacid tablet in water and times how long it takes to dissolve. Which of the following will decrease the reaction rate? A.increasing water temperature B.decreasing water temperature C.using more water 
Chemistry
Silver chromate may be prepared by the following reaction. 2 AgNO3(aq) + K2CrO4(aq) Ag2CrO4(s) + 2 KNO3(aq) Calculate the mass of silver chromate produced when 0.623 L of 1.345 M silver nitrate is reacted with 245 mL of 1.89 M potassium chromate. 
CHEM 1A
Balance the following oxidationreduction reactions, which occur in acidic solution, using the halfreaction method. (Use the lowest possible coefficients. Include statesofmatter under the given conditions in your answer.) Br ‾(aq) + MnO4‾(aq) → Br2(l) + ... 
English
Identify the prepositional phrases in the following sentences. 1. Can anyone count the stars in the Milky Way? PP=in the Milky Way 2. The Milky Way looks beautiful on a clear night. PP=on a clear night 3. I enjoy stargazing from a nearby hilltop. PP=from a nearby hilltop. 4. ... 
college algebra
Use pointslope form to write the equation of the line with the given properties. Write the equation in standard form. m is undefined passing through P(7, 7) 
Algerbra
Write the equation of the circle in standard form. Find the center, radius, intercepts, and graph the circle. x2+y2+16x−18y+145=25 Standard form (xh)^2 +(yk)^2 k 
please help bio
R stands for the dominant form of the color blindness allele and r signifies the recessive form. Because Edward is NOT color blind, the allele on his X chromosome must be __________. 
algebra 2
A rental car agency charges $13 per day plus 12 cents per mile to rent a certain car. Another agency charges $18 per day plus 8 cents per mile to rent the same car. How many miles per day will have to be driven for the cost of a car form the second agency? 
math
divide 5 1/2 divied by 4 3/5 answer in simplest form. does simplest form mean a mixed number or decimal? I got an answer of 1 9/46 or 1.195652... 
Science
What is the name of the energy form that can damage buildings if too much of it is present? and What is the name of a form of renewable energy that comes in and out regularly. 
Parabola
How do I put this parabola in standard form? Could someone show how they would put it in this form: (x  h)2 = 4p(y  k) 1. 4x^2+24x+128y988=0 Please help! I'm lost. 
Math (Simplest Radical Form)
How do you figure out simplest radical form with variables and/or exponents and/or numbers outside the square root 
Calculus
Complete the square to write the equation x^2 + y^2  6x  2y + 4 = 0 in standard form. Use the standard form of the equation to identify the center and the radius of the circle. 
Chemistry
Is the following a properly written thermochemical equation? 2C8H18 + 25O2 → 16CO2 + 18H2O, ΔH = –5,471 kJ/mol No, the equation does not list the enthalpy of reaction. Yes, the equation is correct. No, the equation does not list the states of each substance. No, the ... 
chemistry
Need Help Finishing: Purpose: • To observe a chemical reaction. Materials: • Vinegar (acetic acid, CH3COOH) • Baking soda (NaHCO3) • Measuring cups and spoons • Cup Procedure: 1. Place ½ cup of vinegar in the cup. 2. Add 1 tablespoon on baking soda. 3. Record your ... 
chemistry
Calculate the cell potential of a cell operating with the following reaction at 25°C, in which [Cr2O72‾ ] = 0.030 M, [I ‾ ] = 0.020, M, [Cr3+ ] = 0.20 M, and [H+ ] = 0.60 M. Cr2O72(aq) + 6 I ‾(aq) + 14 H+(aq) → 2Cr3+(aq) + 3 I2(s) + 7 H2O(l) 
chemistry
The following reaction has an equilibrium constant of 0.50 at a given temperature. HCHO(g) CO(g) + H2(g) If you have 0.55 moles of HCHO(g) in a 1.0L container initially, how many moles of HCHO will be present when the system reaches equilibrium? 
Levy
Given the following data: MnO(s) + H2(g) Mn(s) + H2O(l), H = 100 kJ MnO2(s) + 2 H2(g) Mn(s) + 2 H2O(l), H = –52 kJ use Hess's law to calculate the heat of the reaction MnO2(s) + H2(g) MnO(s) + H2O(l) 
Chemistry
A voltaic cell utilizes the following reaction and operates at 298K 3Ce{4+}(aq)+Cr(s)>3Ce{3+}(aq)+Cr{3+}(aq) {}=Charge What is the EMF of this cell under standard conditions? What is emf of cell when [Ce{4+}]=2.1M, [Ce{3+}]=.13M, and [Cr{3+}]=2.0*10^2 
Chemistry
A voltaic cell utilizes the following reaction and operates at 298K 3Ce{4+}(aq)+Cr(s)>3Ce{3+}(aq)+Cr{3+}(aq) {}=Charge What is the EMF of this cell under standard conditions? What is emf of cell when [Ce{4+}]=2.1M, [Ce{3+}]=.13M, and [Cr{3+}]=2.0*10^2 
chemistry
consider the following reaction at 298K 4Al(s)+3O2(g) yields 2Al2O3(s) delta H= 3351.4 Kj find delta S sys find delta S surr find delta S unvi 
Science (Chemistry)
. Complete all the following for the reaction (NH4)2S + Cd(NO3)2 > CdS(s) + NH4NO3 1. Balance this equation 2. Write the ionic equation 3. Write the net ionic equation 
Chemistry
consider the following reaction at 298K 4Al(s)+3O2(g) yields 2Al2O3(s) delta H= 3351.4 Kj find delta S sys find delta S surr find delta S unvi 
math again
what is 1  % 3 in simplest form? What is 2% in simplest form? SIMPLEST FORMS MUST BE IN FRACTIONS PLEASE:) 
math again
what is 1  % 3 in simplest form? What is 2% in simplest form? SIMPLEST FORMS MUST BE IN FRACTIONS PLEASE:) 
Math
6,x,y,16 is a sequence of numbers.6,x.y form an arithmetic sequence.x,y,16 form a geometric sequence. Detrmine the values of x and y 
Chemistry
Estimate the rate of the reaction, H2SeO3 + 6I^ + 4H^+ > Se + 2I3^ + 3H2O given that the rate law for the reaction at 0°C is rate = (5.0 × 105 L5mol5s1)[H2SeO3][I]^3[H+]^2 The reactant concentrations are: [H2SeO3] = 1.5 × 102 M [I] = 2.4 × 103 M [H+] = 1.5 × ... 
chemistry
How do you figure out the answer for the reverse reaction? At 350 K the value of Kp for the equilibrium represented by the balanced equation is 2.87 x 102. Calculate the value of Kc for the reverse reaction at the same temperature. Express answer in scientific notation. 2NOBr... 
Science
A neutralization reaction between an acid and a base produced the salt Na2CO3. What acid and what base participated in this reaction?  Sorry about just asking without showing work or anything, but I don't really get the concept of this and how I should go about... 
Chemistry
Explain the reaction that would occur in a galvanic cell between solutions of Al3+ and Pb2+. Identify the oxidation and reduction reactions and the location of each reaction. Then, use the standard reduction potential tables to determine the cell potential. 
AP Chemistry!!!
Explain the reaction that would occur in a galvanic cell between solutions of Al3+ and Pb2+. Identify the oxidation and reduction reactions and the location of each reaction. Then, use the standard reduction potential tables to determine the cell potential. 
Chemistry
The reform reaction between steam and gaseous methane () produces "synthesis gas," a mixture of carbon monoxide gas and dihydrogen gas. Synthesis gas is one of the most widely used industrial chemicals, and is the major industrial source of hydrogen. Suppose a chemical ... 
Chemistry
consider the equation for the following reaction at equilibrium. X+Y<>2Z+heat the concentration of the product could be increased by 1.adding a catalyst 2.adding more heat to the system 3.increasing the concentration of Y 4.decreasing the concentration of X 
CHEM
Consider the following mechanism: STEP 1: A > B +C (slow) STEP 2: C+D > E (fast) OVERALL: A+D> B+E Determine the rate law for the overall reaction (where the overall rate constant is represented as k). please help me. how do i do this problem? 
chemistry
Consider the following mechanism: STEP 1: A > B +C (slow) STEP 2: C+D > E (fast) OVERALL: A+D> B+E Determine the rate law for the overall reaction (where the overall rate constant is represented as k). please help me. how do i do this problem? 
Business Statistics
The following tables shows the hourly wages of all workers in a certain hospital. Determine the pearsonian coefficient of skewness (population data). Hourly wages frequency 9099 5 100109 9 110119 5 120129 7 130139 5 140149 3 My answers: mean = 116.56 s = 15.72 But i don'... 
College Math
The "learning curve" describes the rate at which a person learns certain tasks. If a person sets a goal of typing N words per minute (wpm), the length of time t (in days) to achieve this goal is given by the following formula. t=62.5ln(1N/80) (a) According to this formula, ... 
chemistry
consider the following reactions O+N2>NO+N Ea=315kj/mol Cl+H2>HCl+H Ea=23kj/mol Why is the activation energy for one much lower that the other. The frequency factor is very close in value for the two. Assume they are the same compute the ratio of the reaction constants... 
College Chemistry
Calculate the volume of carbon dioxide produced from .025 g of aluminum carbonate and excess HCl at 25 degrees c and 745 toor according to the following reaction: Al(2)(CO(3)(3)) (aq) + HCl (aq)  AlCl(3) (aq) + H(2)O + CO(2) (g) im using the numbers in () to show a number... 
Chemistry
Urgent! Considering the following equation. Na2Co3(s)+H3Po4(s)=>Na3Po4(s)+H2O(l)+CO2(g). a) what's the energy amount envolved in the reaction? b)what is the volum of the released gas? c)what the volum of the consumed phosphate acid, considering d=1,69g/ml? Really need to ... 
Chemistry
Use halfcells to balance the following redox reaction, and label the oxidation and reduction halfreactions. Also, note that bromide is a spectator ion and can be eliminated. FeBr(aq) +Mg(s) = Fe(s) + MgBr2(aq) Fe^+2 2e +Br^ e+ + Mg^+2 2e =Fe^+2 2e +MgBr2(aq) 2e e+ Idk ... 
Chemistry
The following unbalanced equation describes the reaction that can occur when (II) sulfide reacts with oxygen gas to produce lead (Il) oxide and sulfur dioxide gas: PbS+O2> PbO + SO2 Balance the equation and describe in words the electron transfers that takes place. 
chemistry
Observe the diagram of the electrolytic cell (A aqueous solution of molten salt with a power supply). The molten salt is lithium flouride. Write the half reaction occuring at the cathode, following the usual style guide and making sure to balance electrons. 
chemistry
Hello, I was confused on this chemistry problem and I was wondering if someone could please help me. 1) Consider the following chemical reaction: 2CH3OH(I) + 3O2 (g) → 2CO2(g) + 4H2O(I) Calculate the number of moles of CO2 produced when 11.25 mL of methanol CH3OH(I) reacted ... 
Math 115 # 19
The following information shows a relationship between the speed of a certain car over a 100mi test trip and the gas mileage obtained: Speed 40 45 50 55 60 gas millage 35 33 28 25 22 Use this information to make a line graph and then predict the gas mileage associated with a ... 
Science
How two neutral objects may become positively and negatively charges? How is atomic mass established? Which atoms will form covalent bonds and which atoms will form ionic bonds? 
Health information Management and office Practice
Regarding forms CMS1500 1. What is the title in Heading section? 2. What is the CMS1500 form number? 3.What is the spacing type of this form? 
algebra
Hello, I need help with this problem use point slope form to find the equation of the line with given properties write equation in given form m=7 passing through (3,0) = 21 
scientific notations
Explain how to convert seven point one three times ten to the eleventh from scientific notation to standard form, then give the answer in standard form. 
chemistry
Choose the correct variables that will create a linear plot for each reaction order. Reaction Order / Answer Zero/ a??? First /b??? Second /c??? a. [A] vs time b. ln [A] vs time c. l [A] vs time d. log [A] vs time e. [A] vs (time)^2 
english
please help me tell which of the following would be better as a thesis statement for a rescreach paper " Poverty". addtional suggestion will be appreciated. thank you!!!  Poverty is affecting thousands of Americans everyday, it isn't sparing anyone of a certain race, age or ... 
Grade 8 Math
Can you write them in Mathematical/numbers form I'll solve them myself. i don't really get it though i have written the first one in mathematical for but i'm not sure if that's right. 1. When six is subtracted from five times a certain number, the result is sixtynine. Find ... 
Chemistry
For the following reaction, the equilibrium constant KC = 97.0 at 900 K. If the initial concentrations of NH3 and H2S are both 0.20 M, what is the equilibrium concentration of H2S? H2S (g) + NH3 (g) > NH4HS (s) 
Chemistry
For the following reaction, the equilibrium constant KC = 97.0 at 900 K. If the initial concentrations of NH3 and H2S are both 0.20 M, what is the equilibrium concentration of H2S? H2S (g) + NH3 (g) > NH4HS (s) 
Chem
Hi! I need help with this problem, also I was wondering what kind of problem is this... limiting reactant?calculate the mass of hydrogen cyanide that could be produced by the complete reaction of 500.0 g of ammonia, 700.0 g of oxygen and 400.0 g of methane according to the ... 
chemistry
In a constantpressure calorimeter, 75.0 mL of 0.830 M H2SO4 was added to 75.0 mL of 0.310 M NaOH. The reaction caused the temperature of the solution to rise from 23.20 °C to 25.31 °C. If the solution has the same density and specific heat as water, what is ΔH for this... 
chemistry
In a constantpressure calorimeter, 75.0 mL of 0.950 M H2SO4 was added to 75.0 mL of 0.460 M NaOH. The reaction caused the temperature of the solution to rise from 21.13 °C to 24.26 °C. If the solution has the same density and specific heat as water, what is ΔH for this... 
Physics
In a constantpressure calorimeter, 75.0 mL of 0.810 M H2SO4 was added to 75.0 mL of 0.390 M NaOH. The reaction caused the temperature of the solution to rise from 22.68 °C to 25.34 °C. If the solution has the same density and specific heat as water, what is ΔH for this... 
Chemistry
Recall that all aqueoous solutions contain_____. Water can also undergo ____. This process is called the ______of water. The reaction can be written as: Notice the double arrow in the reaction. This indicates that the reaction is_____. However, only a tiny fraction of water ... 
Chemistry
When solid magnesium nitride reacts with water the reaction produces solid magnesium hydroxide and ammonia gas. 26.0 grams of magnesium nitride are reacted with 17.6 grams of water. 1. How many grams of magnesium nitride will remain after reaction is complete? 2. How many ... 
chemistry
LiOH and NaOH can each react with CO2 to form the metal carbonate and H2O. These reactions can be used to remove CO2 from the air in a spacecraft. a. Write a balanced equation for each reaction. b. Calculate the grams of NaOH and of LiOH that remove 288 g CO2 from the air. c. ... 
Science
In the following reaction, how many liters of oxygen will react with 270 liters of ethene (C2H4) at STP? C2H4(g) + 3O2(g) > 2CO2(g) + 2H2O(g) The volume of one mole of gas at STP is 22.4 liters. 
chemistry question
What mass of propane (C3H8) is needed to produce 346 g carbon dioxide in the following reaction? C3H8(g) + 5O2(g) > 3CO2(g) + 4H2O(g) A. 346 g C3H8 B. 115 g C3H8 C. 5075 g C3H8 D. 1.86 g C3H8 
chemistry
What mass of propane (C3H8) is needed to produce 346g carbon dioxide in the following reaction? C3H8(g)+5O2(g)> 3CO2(g) +4H2O(g) A. 115g C3H8 B. 1.86g C3H8 C. 5075g C3H8 D. 346g C3H8 
Chemistry
For a particular isomer of C8H18, the following reaction produces 5099.5 kJ of heat per mole of C8H18(g) consumed, under standard conditions. What is the standard enthalpy of formation of this isomer of C8H18(g)? 
math
write an equation for the line in point slope form...when it passes through (9,1) and the x intercept is 5 and then slope intercept form...im so confused 
math
write an equation for the line in point slope form...when it passes through (9,1) and the x intercept is 5 and then slope intercept form...im so confused 
sslope interception form
write slope interception form the equation of the line thay passes through (0,2) and is perpendicular to the line 3y2x=5 
math
write this number in word form 310,763,136 write this number in expanded form 20,484,163 
Math
What is the relationship between DG and FG? A. DG is parallel to FG B. DG is perpendicular from FG C. DG intersects FG to form an acute angle D. DG intersects FG to form an obtuse angle My answer is C 
science(chem)
How many mg of fluorenone can 0.53mol of sodium borohyride(NaBH4) reduce? ~I don't know how to get this..wouldn't I have to have a reaction equation given to me?? Well I didn't have one for the question given to me so I don't know what to do. I tried looking for the reaction ... 
Biochemistry
Complete hydrolysis of 25 mM ethyl acetate in an enzyme esterase catalyzed reaction is carried out in a 40 mM NaCl solution buffered by 0.2 M TrisCl, pH 9.1. What is the pH at the end of the reaction? (For Tris base, which is the abbreviation for Tris (hydroxymethyl) ... 
Physics  reaction force
When you pull on a rope, the rope pulls back on you. Describe how the rope creates this reaction force. 
biology help
Does photosynthesis require energy? What type of energy reaction would photosynthesis be? Is photosynthesis an example of a coupled reaction? 
Chemistry
Can anyone help I have to write an equation a structural formula for a reaction between the following, having some trouble working it out. Hopefully you can understand the way I have put it. CH2=CHCHOH there is a CH3 with single bond under CH next to OH + CH3CHCH2C to one... 
Chemistry
A solution made up of 1.00 M NH3 and 0.500 M (NH4)2SO4 has a pH of 9.26. a. Write the net ionic equation that represents the reaction of this solution with a strong acid. b. Write the net ionic equation that represents the reaction of this solution with a strong base. c. To ... 
Chemistry
Which of the following reactions is exothermic? 1. Na(s) > Na(g) 2. Na(g) > Na+ + e 3. Cl2(g) > 2Cl(g) 4. Cl(g) + e > Cl1 My guess is 4, but I'm not sure Here is what you do. For 1, do we think it will take energy to change Na as a solid to Na as a gas. ... 
Chemistry
A Test Liquid Has A Density Of 1.1g/ml. When You Pour Some Of It Into A Cup Of Water, What Will Happen (assuming that their natures are such that they don't mix & that there is no chemical reaction between the two substances)? Choose a.b.c. or d. A The test liquid will float ...