a certain reaction has the following generaln form
74,738 results, page 95

Trig
4. Asked to simplify the expression sin(180−è), Rory volunteered the following solution: sin(180−è) = sin 180−sin è, and, because sin 180 is zero, it follows that sin(180−è) is the same as −sin è. Is this answer correct? If not, what is a ... 
Science
1.The images above show particles in a medium. Which of the following shows the worst conditions for a sound wave to travel? A B C D 2.Which of the following correctly describes a radio wave? A.long wavelength and high frequency B.long wavelength and low frequency C.short ... 
Chem
If the initial pressure of HD(g) is 8.913 atm, calculate the % decomposition of HD(g) when the reaction comes to equilibrium according to the balanced equation. The value of Kp at 1000 K is 0.26. The initial pressure of the reaction products is 0 atm. 2HD(g) = H2(g)+D2(g) So I... 
Chemistry
I did a lab for Organic Chemistry I did a simple distillation for an unknown and found that it boiled at 76 degrees. I also found out that the unknown was ethanol since we knew what the 4 possibilities were and mine was closest to ethanol. I also did a fractional distillation ... 
Calclulus  L'Hopital's Rule
Evaluate the limit as x > Infinity [5xsqrt(25x^2+4x)] Direct substitution yields the indeterminate form Infinity  Infinity. Apparently, according to text book, I have to change that mess into something I can use L'Hopital's Rule on. Except the only example the book gives... 
Biology
The diversity of chemical reation occuring in a cell depends mostly on certain molecules present in the cells are called? It's one of these proteins, coenzymes, or enzymes. i believe it is enzymes, but i could be wrong. correct 
math
The minimum daily values (MDVs) for certain foods are given. They are based on a 2000 calorie per day diet. Find decimal and fractional notation for the percent notation on each sentence. a) 
math
The minimum daily values (MDVs) for certain foods are given. They are based on a 2,000 calorie per day diet. Find decimal and fractional notation for the percent notation in each sentence. 
math
The minimum daily values (MDVs) for certain foods are given. They are based on a 2,000 calorie per day diet. Find decimal and fractional notation for the percent notation in each sentence. 
Spanish
Not really a homework question, but more of asking for advice... I'm doing a skit tomorrow with another classmate in spanish and we had to write and memorize(sort of) lines according to a certain scenario. Are there any good techniques to help with my performance? 
child psycology
We see indications that a child's role in perceptual development is passive when we observe? A. irrelevent information made relvant. B. selective attention. C. a preference for certain stimuli. D. systematic search. 
Calculus
I am supposed to find when there will be 40 berry bushes. I am given the function p(t)=(16t+50t^3)^1/3. P is the population of a certain type of bush in a conservation area and t is time in years. I know that i am supposed to make p(t) = 40, but i don't know how to solve for t... 
Physics
A car is traveling counterclockwise along a circular bend in the road with an effective radius of 200 m. At a certain instant, the carâ€™s speed is 20 m/s, but it is slowing down at a rate of 1.0 m/s^2. What is the magnitude of the carâ€™s acceleration? 
electrical
6.A resistor R1 dissipates power P when connected to a certain generator with voltage V. If a resistance R2 is put in series with R1 the power dissipation by R1 A) Decreases B) Increases C) Remains the same D) Any of the above depending upon the value of R1 and R2 
math
If the hourly sales at a certain register in a supermarket are normally distributed with a mean of $650 and a standard deviation of $60, find the probability that the sales during a randomly selected hour are greater than $800. 
Word Problem
In a certain individual the resting diastolic pressure at time t is given by B(t)= 80+7sin((pi)(t)/(12)) where t is measured in hours since midnight and B(t) in mmHg (millimeters of mercury). Find this person's pressure at 6:00 am, 10:30 am, noon, and 8:00 pm. 
College Algebra
The concentration C of a certain drug in a patient's bloodstream t minutes after injection is given by C(t)=50t/t^2+25. Determine the time at which the concentration is highest. Round your answer to the nearest tenth of a minute. 
calc
find the volume of the solid generated by revolving around the xaxis: y=e^(x8), y=0, x=0, x=10 So I know you can use the washer method, but the shell method can also be used and it should be better. The issue is I'm not certain how to actually do it. Any help is appreciated! 
Sociology
This is the reason an employer might restrict employee internet access? a. Employees waste too much time on the internet b. viewing certain kinds of sites could lead to a hostile work environment 
physics
i know this is stupid most likely but i missed a few weeks of lecture bc i was in hospital and i caught up on most of the notes but certain parts have me confuse, does anyone know how to tell if an electric force is negative or positive? 
calcullus
Suppose the quantity demanded per week of a certain dress is related to price by the demand equation p=√752x. In order to maximize revenue, how many dresses should be made and sold each week? 
Math
Suppose the quantity demanded per week of a certain dress is related to price by the demand equation p=√752x. In order to maximize revenue, how many dresses should be made and sold each week? 
Calculus
It requires 8 inch pounds of work to stretch a certain spring 2 inches from its rest position. Assuming that the spring follows hooke's law, what is k? Please answer this question. Thanks for your answers in advance. 
Math  Variation
under certain conditions, the thrust T of a propeller varies jointly as the fourth power of it's diameter, d, and the square of the number, n, of revolutions per second. What happens to the thrust if n is doubled and d is halved? 
SCIENCE
A SCIENTIST NOTED A POSSIBLE RELATIONSHIP BETWEEN A CERTAIN CHEMICAL SUBSTANCE FOUND IN FISH AND THE OCCURRENCE OF THE KIDNEY FAILURE IN HUMANS. WHICH STEPS SHOULD THE SCIENTIST BEFORE CONDUCTING EXPERIMENT. 
homework
The number of bacteria in a certain population increases according to a continuous exponential growth model, with a growth rate parameter of 3.9% per hour. How many hours does it take for the size of the sample to double? 
math
A certain medicine requires 10 mg per 10 kg of weight. How much medicine is required for a patient that weighs 273 pounds? Round answer to the nearest 10th. Use Unit Abbreviations for Units. 
Math
A certain medicine requires 10 mg per 40 kg of weight. How much medicine is required for a patient that weighs 203 pounds? Round answer to the nearest 10th. Use Unit Abbreviations for Units 
Statistics
Suppose that on average 10% of the people with an airlineticket doesn't show up at the flight.For a certain flight, the plane has 100 seats and 110 tickets are sold. What is the probability that everyone who shows up will have a seat? 
Simple geometry question
What do the lines mean that are on certain triangles. for example, a triangle would have a single dash at the bottom, two dashes on one side and three dashes on the other 
physics
A certain refrigerator is rated as being 39% as efficient as a Carnot refrigerator. To remove 102 J of heat from the interior at 0 °C and eject it to the outside at 23 °C, how much work must the refrigerator motor do? 
physics
A certain refrigerator is rated as being 39% as efficient as a Carnot refrigerator. To remove 102 J of heat from the interior at 0 °C and eject it to the outside at 23 °C, how much work must the refrigerator motor do? 
business math
Statistics show that the sales force of a certain company successfully closed 352 sales out of 800 sales calls. What was their percent success rate? 
Math
Emma started with a certain amount of money. She spent 2/5 of her money. She earned €5 the next day. Later, she lost 3/7 of her money, but she still had €20 left. How much did she start with? 
CHEM
1. How many moles of water can be made from 4 moles of oxygen gas and 16 moles of hydrogen gas? What is the limiting reagent? 2. Calculate the mass of water produced from the reaction of 24.0 g of H2 and 160.0 g of O2. What is the limiting reagent? 3. The burning of 18.0 g of ... 
Physics
A certain type of ideal gas at pressure p0 is contained in a plugged flask of volume V initially at temperature T1. The environmental pressure remains constant p0. (A) As the flask is heated up to temperature T2, the plug pops out. What is the pressure p2 of the ideal gas ... 
chemistry
Asprin, C9H8O4, is prepared by reacting salicylic acid, C7H6O3, with acetic anhydride, C4H6O3, in the reaction C7H6O3(s) + C4H6O3(l) > C9H8O4(s) + C2H4O2(l) A student is told to prepare 45.0 g of aspirin. She is also told to use a 55.0% excess of the acetic anhydride and ... 
algebra 1b
i need to know how to solve certain problems like this 4x=2y10 x+2y=5 i need examples of this and shown to me step by step 
physics
A certain car is capable of accelerating at a rate of 0.59 m/s2. How long does it take for this car to go from a speed of 27 mi/h to a speed of 33 mi/h? 
Science
A certain car is capable of accelerating at a rate of + 0.60 m/s^2. How long does it take for this car to go from a speed of 55 mi/h to a speed of 60 mi/h? 
physics
A certain car is capable of accelerating at a rate of +0.90 m/s2. How long does it take for this car to go from a speed of 55 mi/h to a speed of 80 mi/h? 
physics
A certain car is capable of accelerating at a rate of +0.50 m/s2. How long does it take for this car to go from a speed of 45 mi/h to a speed of 85 mi/h? 
physics
A certain car is capable of accelerating at a rate of +0.90 m/s2. How long does it take for this car to go from a speed of 35 mi/h to a speed of 70 mi/h? 
Physics
A certain car is capable of accelerating at a rate of +0.90 m/s2. How long does it take for this car to go from a speed of 50 mi/h to a speed of 65 mi/h? 
science
a cookie a certain mass. explain why the mass would not change if you break the cookie in half. 
physics
A certain car is capable of accelerating at a rate of +0.60 m/s2. How long does it take for this car to go from a speed of 20 mi/h to a speed of 65 mi/h? 
physics
A certain car is capable of accelerating at a rate of + 0.30 m/s2. How long does it take for this car to go from a speed of 55 mi/h to a speed of 80 mi/h? 
physics
A certain car is capable of accelerating at a rate of + 0.80 m/s2. How long does it take for this car to go from a speed of 15 mi/h to a speed of 75 mi/h? 
math
A certain computer can perform 105 calculations per second. How many calculations can it perform in 10 seconds? 
value
The sum of 9 and a certain number is 2 whole number 1 over 4 times the original number. Find the number 
Physics
A brass is 2m long at a certain temperature.what is its length for a temperature rise of 100k if the expansivity of brass is 18×10^6k^1 
Chemistry
This was the previous one Substances A, B, and C can all act as oxidizing agents. In solution, A is green, B is yellow, and C is red. In the reactions in which they participate, they are reduced to A, B, and C ions, all of which are colorless. When a solution of C is ... 
Math 2
You should make two selections from the list below. Which two of the four equations represents parallel lines? 2x  3y = 10 6x  9y = 15 3x + 2y = 10 9x + 6y = 30 i think it's the second one Parallel lines have the same slope. Rework your equations to be in the form y=mx + b ... 
Batteries  Engineering
Here we consider instead dissolving guns (which we will assume are pure iron) with sulfuric acid. Fe+H2SO4>FeSO4+H2 It is apparent that they must use an outside source of electrical power to drive the dissolution of the iron. They use a small current so that the ... 
Chemistry Lab
So I did a kinetics lab on the rate of reaction of peroxydisulfate ion with iodide ion. Part 1 was the effect of concentration. One of the questions asked is to calculate the amount of thiosulfate consumed in moles. My results for trial 1 were (Times taken for consumption of 1... 
Science/CHEM
Part 1 Chapt 4 1. You dissolve 157.1 g of ammonium nitrate in a 250 mL volumetric flask and add water to the mark (call this solution A). You take 30 mL of solution A and place it in a 100 mL volumetric flask and add water to the mark (this is solution B). Next you take 50 mL ... 
Algebra
Glen created a mural on a rectangular sheet of paper with a width of √18 feet and a length of √24. A. Find the exact area of the mural, in simplified form. When Glen’s mural was unveiled, the school made a smaller version of the mural to advertise the event. The ... 
english
Axia College Material Appendix B Sentence Structure Review Each of the following sentences has one grammatical error. The errors are in one of the following four categories: subject–verb agreement, runon sentence, verb form and tense, or sentence fragment. Identify which of... 
Chemistry
What is the molarity of Cu2+ in a catalyzed reaction using 3 drops of CuSO4 at .03M in 50.0ml, and what is the molarity of Cu2+ using 6 drops? (Consider the extent of dilution of the 0.1 M CuSO4 solution in preparing the 50 mL reaction solution. Estimate 20 drops/mL.) My Work... 
Chemistry: Please check my work!I am stumped
When nitroglycerin (C3H5N3O9) explodes, it decomposes into the following gases: CO2, N2, NO, and H2O. If 239g of nitroglycerin explodes, what volume will the mixture of gaseous produces occupy at 1.00 atm pressure and 2678oC? a. Write a balanced equation for the reaction. b. ... 
English!
While a heroic epic focuses on the expolits of a single hero, an epic is a long poem that : A: focuses on the exploits of a heroine B: tells tales only about gods and goddesses C: explains how certain events and objects in nature came to be D: describe the way of life of an ... 
Chemistry
How did the metal atoms become ions? Metal atoms became ions by losing electrons to form positively charged ions(cations). How did the nonmetal atoms become ions? Nonmetal atoms became ions by gaining electrons to form negative ions(anions). 
Chemistry
Question : ka1 and ka2 values of H2X is given 1*(10)^5 M and 1*(10)^9 M.50cm^3 of 0.2 M KOH and 50 cm^3 of H2X of unknown concentration is mixed together and the pH of the final solution is given as 7. 1)Find the concentration of H2X 2)Find the pH of the initial H2X solution... 
chemistry
Question : ka1 and ka2 values of H2X is given 1*(10)^5 M and 1*(10)^9 M.50cm^3 of 0.2 M KOH and 50 cm^3 of H2X of unknown concentration is mixed together and the pH of the final solution is given as 7. 1)Find the concentration of H2X 2)Find the pH of the initial H2X solution... 
English
I don't exactly know if my answers are correct, but can you please check? 1.) Which of the following could you reveal? A.) your age B.) your date of birth C.) your thoughts D.) your plans for the future I think it's a,b,c, and d. 2.)which of the following would have an impact... 
Chemistry
EQUILIBRIUM: To prepare the standard solution, a very large concentration of ferric ion is added to a small initial concentration of thiocyanate ion. True or False It would help if we knew what you were doing. We are determining Chemical Equilibrium: Finding a Constant Kc... ... 
Math
How do I Write the equation to find the slope of a line? Write the pointslope form of the equation of a line? Write the slopeintercept form of the equation of a line? 
Chemistry
Question : State whether the following are true or false. SO2 gas changes the colour of a KMnO4(aq) solution They have taken this as false and given the following equation: SO2+H2O+2KMnO4>K2SO4+MnSO4+H2SO4 (not balanced) But why they have taken this as false when Mn2+ ... 
Business
If you were to purchase stock, what sort of information about the company’s stock would you use to make your decision to buy shares of a certain company? 
Chemistry
A certain vinegar is 6.02% acetic acid (HC2H3O2) by mass. How many grams of HC2H3O2 are contained in a 355mL bottle of vinegar? Assume a density of 1.01g/mL. 
college physics
A certain 9V battery measures 9.0 V with no load connected to it, but only 8.5 V when connected to a radio which draws 150 mA of current. What is the internal resistance of the battery? 
General Chemistry
A certain protein was found to have 0.855% zinc by mass. Determine the minimum molecular mass of the protein. How do I go about solving this? 
math
malik paid 480$ to purchase a certain number of pizzas, but 2 extra were delivered which decreased the amount per pizza by 1$. how many pizzas were delivered? 
Algebra
$9500 is invested part of it at 12% and part of it at 7%. For a certain year the total yield is $960.00. How much was invested at each rate? Please show work 
Math
For a certain product, one case holds 8 boxes and each box holds 12 items, how many total cases are needed to hold 500 items? 
science
A car traveling along the highway needs a certain amount of force exerted on it to stop. More stopping force may be required when the car has: 
chemistry
For a certain change, value of Delta U is 2.37 kJ. During the change, the system absorbs 650 joules. How much work did the system do? Please help! I get 3.02 but is not correct!! 
Physics
A certain spring stretches 5.8cm when a load of 38N is suspended from it. How much will the spring stretch if 48N is suspended from it (and it doesn't reach its elastic limit)? 
science
A certain quantity of electricity deposits 0.54grams of silver nitrate solution. What volume of H2 will be liberated by the same quantity of electricity at 27 ° C and 750 mm of Hg pressure 
Math
The formula t =vh/4 can be used to find the time t in seconds it will take an object to fall from a certain height h in feet .how long did it take the applet o fall? 
Math
A certain marine engine has cylinders that are 3.55 inches in diameter and 3.74 inches deep. Find the total volume of 4 cylinders? hard question is there formula 
Maths
The count of bacteria in a certain experiment was increasing at the rate of 2 per hour. Find the bacteria at the end of 2 hours if the count was initially 500000. 
Physics
A balloon is filled with a gas which is lighter than air. It is observed to rise in air up to a certain height. State the reason why the balloon stops rising. 
Chemistry
When a solution of a certain gadolinium salt is electrolyzed with a current of 1.0 A for 2.0 h, 0.025 mol of Gd metal forms. Calculate the charge on the gadolinium ion in the salt. 
English Writing
i have an assignment that i have to email back my friend on identifying minerals. the trouble is how do i write this assignment in "EMAIL FORM" could you helped me please very please...i already finished my assignment now i just have to turn the write up in the form of an ... 
Chemistry
Why are metals malleable? A. Because they reflect incoming photons B. Because they are made of atoms that have tightly held electrons C. Because of their structure and uniform bonding in all directions D. Because their lattice energy is very high I think the answer is c but I ... 
Social Studies
Which occurrence is not characteristic of global warming? a. melting mountain glaciers in the south pole b. stabilization in the sea level due to warm weather*** c. greater amounts of precipitation d. loss of habitat for certain species 
algebra[please check]
in questions 1 and 2, write an equation of the line in slopeintercept form. 1. the slope is 4/3; the yintercept is 2. 2. the slope is 0; the yintercept is 5. my answers: 1.y=4/32 2. y=5 ______________________ write an equation of the line that passes through the point... 
Science(chem)
I have a few questions I need help with! 1. Hydrogen bonding will account for the unusual physical properties of water. TRUE FALSE 2. Air is considered to be a homogeneous mixture that is 79% nitrogen gas, 20% oxygen gas and 1% all the other gases. In this mixture, nitrogen ... 
chemistry
*This is part of an exam. so please don't give full solution* just trying to bump ahead of a block. The decomposition of NO2 at room temperature exhibits the following variation in concentration with time: The concentration of NO2 is expressed in mol/liter, while time is ... 
Chemistry
I am stuck on b)... Reacting 1 L of H2(g) with 1 L C2H2(g) (both at STP) results in the formation of 1 L of C2H4(g) if the reaction is maintained at the same conditions (STP) and goes to completion. If this reaction produced 6.3 kJ of heat (absorbed by the surroundings), ... 
kim
a gaseous hydrocarbon reacts completely with oxygen gas to form carbon dioxide and water vapor. given the following data, determine (delta)HoF for hydrocarbon: (delta)Horxn=2044.5kj/mol hydrocarbon (delta)HoF CO2= 393.5kj/mol (delta)HoF H2O = 242kj/mol denstity of CO2 and ... 
computers (Check)
Will someone please check my C++ for me? 1. What does the Load ( ) method do? Gets data from a file and puts it into a DataSet object. < Gives a value to an attribute of an XmlElement object. Deletes all the data in a DataSet object. Tells a form to appear. 2. Scenario... 
Physics
A certain type of ideal gas at pressure p0 is contained in a plugged flask of volume V initially at temperature T1 . The environmental pressure remains constant p0 . (a) As the flask is heated up to temperature T2 , the plug pops out. What is the pressure p2 of the ideal gas ... 
Chemistry
Factors affecting reaction rate. Use collision theory to explain. Factor: nature of the reactant Affect on rate: more or less reactive based on its chemical identity. reactivity: aq>g>l>s Explanation: For the other factors, we had to explain it based on whether the ... 
chemistry
Under the appropriate conditions, NO forms NO2 and N2O: 3NO(g) <> N2O(g) + NO2(g) Use the values for delta G naught for the following reactions to calculate the value of Kp for the above reaction at 500.0 C 2NO(g) + O2(g) <> 2NO(g) delta g=69.7 kJ 2N2O(g) <... 
Linear Equations
Kathleen is ordering wraps from a local sandwich shop. The total charge includes a set delivery fee plus the price per wrap. Each rap is the same price. Kathleen asks about specific orders and is given the following info: If she orders 20 wraps, the total cost will be $100 If ... 
Algebra 1 ( bobpursley)
1. Write an equation in slopeintercept form for the line that passes through (5,0) and is perpendicular to the line given by y = 5/2x + 6. A: m = 2/5 y = mx + b 0 = (2/5)(5) + b 0 = 2 + b b = 2 y = 2x/5 2? 2. Write an equation in slopeintercept form for the line that ... 
engineering
what is the SI form A)MN/ks^2 B)kN/ms 
quadratic
what is x^2+4=(3x1)^2 in the form ax^2+bx+c=0