# a certain reaction has the following generaln form

72,592 results, page 94

### Math - Trig

The equation y = 20sin(0.5θ - 2) + 40 models the monthly temp for a certain city. Use the equation to predict the temperature in the city during December. Thanks

### Chemistry #27

If He(g) has an average kinetic energy of 4410 J/mol under certain conditions, what is the root mean square speed of O2(g) molecules under the same conditions?

### math

A standard deck of 52 playing cards is placed facedown on a table.how many cards must you draw from the deck to be certain that you have a pair of the same value?

### statistics

From experience, an airline knows that only 80% of the passengers booked for a certain flight actually show up. If 8 passengers are randomly selected, find the probability that fewer than 7 of them show up.

### physics

A certain power plant puts out 520MW of electric power.Estimate the heat discharged per second, assuming that the plant has an efficiency of 34%

### chemistry

If He(g) has an average kinetic energy of 7590 J/mol under certain conditions, what is the root mean square speed of F2(g) molecules under the same conditions?

### chemistry

If He(g) has an average kinetic energy of 7590 J/mol under certain conditions, what is the root mean square speed of F2(g) molecules under the same conditions?

### Math; Please help

(Tell whether the 2 quantities vary together. Explain your reasoning.) The time it takes to travel a certain distance and the rate which you travel. Please help me!

### Science

If a certain spring stretches 9.76811 cm when a load of 17.9936 N is suspended from it, how much will the spring stretch if it is cut in half and 65.8458 N is suspended from it? Answer in units of cm.

### stats

the weights of the fish in a certain lake are normally distributed with a mean of 17 lb and a standard deviation of 12. if 16 fish are randomly selected, what is the probability that the mean weight will be between 14.6 and 20.6 lb?

### PHYSICS

A certain resistance thermometer at triple point of water is 152.0 ohms. What is the temperature of the system in degrees celsius when the resistance of the thermometer is 230.51ohms.

### Math

if the probability that an identified hurricane will make a direct hit on a certain stretch of beach is 0.20, what are the odds against a direct hit? 1 : 0.20 I :19 i think its like this way?

### College Chemistry

The specific heat of a certain type of cooking oil is 1.75 cal/(g·°C). How much heat energy is needed to raise the temperature of 2.83 kg of this oil from 23 °C to 191 °C?

### math

A lends Rs.2,500 to B and a certain sum to C at the same time at 7% p.a. simple interest. If after 4 years, A altogether receives Rs.1,120 as interest from B and C, then the sum lent to C is:

### math\

Michael invested a certain amount of money at 3% interest and $750 more than that amount at 5%. His total yearly interest was $157.50. How much did he invest at each rate?

### Chemistry

A single dose of a certain antacid contains 250. mg of Mg(OH)2 and 300. mg of CaCO3. How many mmol of H+ can be neutralized by one dose of this antacid? Do not include units in your answer

### Physics

A balloon is filled with a gas which is lighter than air.it is observed to rise in a air upto a certain height. State a reason why the balloon stops rising.

### Math

A certain person burn 6.5 calories per minute while walking how many calories will be burned if that person wants for 3 hours round your answer to the nearest tenth

### College algerba

The half-life of a certain radioactive element is about 1500 years. After 2800 years, what percentage P of a sample of this element remains?

### Physics

A certain material has a work function 0 (angle sign) = 1.5 eV. a)what is the frequency of a photon that ejects an electron from his material, giving the electron an energy of 1.6 eV? b)what type of EM radiation is this?

### physics

a body is thrown vertically upward fron a certain height of pole and their velocity is 100m/s and then it returns to the ground in 6second then find the height of the pole ?

### Math (ratios)

At a certain college, the ratio of the men to women is 5:4. If there are 2800 men, how many women are there?

### algebra

how would i figure out a problem like: a^2 + b^2 = 5^2 is there a certain method to figure this out?

### Physics

A certain spring stretches 6 cm when a load of 30 N is suspended from it. How much will the spring stretch if 41 N is suspended from it?

### grammar

Which sentence is correct I feel that us students.... or would it be I feel that we students... I think its us but I am not certain

### College Math

Suppose the supply and demand for a certain videotape are given by: Supply: p=1/3q^2 Demand: p=-1/3q^2+48

### chemistry

'the vapour density of certain gas x is 4 times that of y the molecular mass of x is m the molecular mass of y is ?'

### math

A certain computer can perform 10^5 calculations per second. how many calculations can it perform in 10 seconds

### algebra

Your company would like to know how sales levels affect profits. If too few items are sold, then there is a loss. Even if too many items are sold, however, the company can lose money (likely because of low pricing). It is good to know how many items can be sold for there to be...

### Math

Asked to simplify the expression sin(180Ã¢Ë†â€™ÃƒÂ¨), Rory volunteered the following solution: sin(180Ã¢Ë†â€™ÃƒÂ¨) = sin 180Ã¢Ë†â€™sin ÃƒÂ¨, and, because sin 180 is zero, it follows that sin(180Ã¢Ë†â€™ÃƒÂ¨) is the same as...

### geology (very urgent)

i have an assignment that i have to email back my friend on identifying minerals. simple enough 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 ...

### geology (VERY X3 URGENT)

i have an assignment that i have to email back my friend on identifying minerals. simple enough 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 ...

### biology

I need to come up with a really good hypotheses for Why do certain animals eat more at certain temperatures than others or than they do at other temperatures? I just don't know what a good hypotheses is but here are some examples of bad ones: An organism's metabolism is ...

### CHEMISTRY

A STUDENT STUDYING THE FE+3- HSCN equilibrium put into a test tube 10.00ml of 2.00 x 10-3 M Fe(NO3)3 with 10.0 mL of 2.00 x 10-3 M HSCN.THE H+ in the resulting solution was manteined at 0.500.By spectrophotometric analysis of the equilibrium solution, the equilibrium ...

### Accounting

Costs can be classified into two categories, fixed and variable costs. These costs behave differently based on the level of sales volumes. Suppose we are running a restaurant and have identified certain costs along with the number of annual units sold of 1000. Item: Raw ...

### Math

the only perfect number of the form x(n) + y(n) A perfect number is an integer that is equal to the sum of its positive divisors (not including itself). Therefore, 6 is a perfect number, since its positive divisors are 1, 2, and 3 and 1+2+3 = 6. 28, 496, and 8128 are also ...

### Science please help

Draw Bohr diagrams of a magnesium atom bonding with fluorine atoms. Draw atoms then electron transfer and finally the ions that form. What type of bonding occurs? Draw Bohr diagrams of 2 hyrdogen atoms bonding with an oxygen atom by sharing electrons to form a water molecule. ...

### Calculus

There was a typo in last question A company estimates that the cost ($) of producing x units of a certain product is given by: C= 800 + .04x + .002x^2 Find the production level that minimizes the average cost per unit.

### MATH

The equation y=12x+2 shows the total cost for ordering tickets on the phone for a certain outdoor concert. Tickets are $12 each, and there is a one-time service fee of $5. Can the slope of this line be thought of as a rate? Explain.

### math

the equation y=12x+5 shows the total cost for ordering tickets on the phone for a certain outdoor concert. Tickets are $12 each and there is a one time service fee of $5. Can slope of this line be thought of as a rate? explain

### math

tell wether the event is ibest described as impossible, unlikley, likley to occur half the time, quite likley, or certain, explain yor resoning. the probability of rain is 80%, or 0.8 how can i find the answer to this?

### physics

A series of waves traveling at 200 m/sec are being generated by a 100 Hz source. A point at the very top of the crest of a certain wave is ____ meters from a corresponding point 3 crests away.

### algebra 2

Solve the problem. The growth in the population of a certain rodent at a dump site fits the exponential function A(t)= 164e0.032t, where t is the number of years since 1975. Estimate the population in the year 2000.

### Chem

the standard molar enthalpy and entropy of the denaturation of a certain protein are 512 kj/mol and 1.60 kj/K. mol, respectively . comment on the sign s and magnitudes of these quantities, and calculate the temperature at which the process favors the denatured state

### Statistics

suppose u are playing a game of chance.If you bet $4 on a certain event,you will collect $148 (including your $4 bet) if you win.Find the odds used for determing the payoff.Also post How did you got the answer

### maths

The lifetime in hours of a certain make of batteries follows a normal distribution with mean 160 and standard deviation 30. Calculate the interval, symmetrical about the mean within which 75% of the battery lifetimes lie.

### SCIENCE

20. A horticulturist wants to plant that produces flowers with a certain size color and fragrance but is not aware of any one plant having all of these traits. The quickest way she could achieve her goal would be to apply the process of .

### Hist

The average Northerner lost interest in reconstruction once it became reasonably certain that the former slaves: a) had economic decurity b)were guaranteed the vote c) would not be re-enslaved d)were guaranteed social equality

### science

1. The images above show particles in a medium. Which of the following shows the worst conditions for a sound wave travel? A B C D is the answer A? Which of the following correctly describes a radio wave? A long wavelength and high frequency B long wavelength and low frequency...

### business

I am having trouble picking two oppossing views in the world today. HEre is the assignment. Any suggestions will help. Conduct a search through the Opposing Viewpoints Resource Center database in the University Library. From the list of popular searches, select two topics that...

### Algebra

Need help with two questions. I've been stuck on them for a while now. 1) Find a general form of an equation of the line through the point A that satisfies the given condition. A(−2, 5) slope 3/4 2)Find a general form of an equation of the line through the point A that ...

### calculus

for the following f defined by f(x)=4x^2+3x+2. find the following values. a. f(-2)= b. f(-x)= c. -f(x)= df(x+h)= please show work

### calculus

for the following f defined by f(x)=4x^2+3x+2. find the following values. a. f(-2)= b. f(-x)= c. -f(x)= df(x+h)= please show work

### Government

True or false The heads of the executive departments form the Executive Office of the president. I think it's false. Am I right? A president's threat to grant amnesty can sometimes convince Congress to make changes in a bill to satisfy the President's objections. As the nation...

### Chemistry

At room temperature, 80.0 ml of 0.125 M AgNO3(aq) and 20.0 ml of 0.500 M Fe(NO3)2(aq) are mixed together, generating the following equilibrium system Ag+ (aq) + Fe2+(aq) Ag(s) + Fe3+(aq). At equilibrium, the concentration of Fe3+ is 0.00505 M. (a) (4 pts) Calculate the initial...

### Chemistry

How would you synthesize each of the following? a. 1,2-dibromopropane from propene b. acetone (2-propanone) from an alcohol c. tert-butyl alcohol (2 methyl-2-propanol)from an alkene d. propanoic acid from an alcohol How would you synthesize the following esters? a. n-...

### math

A tangram is a geometric puzzle made from seven pieces that form a square. Trace the pieces, cut them out, and answer the following questions. The puzzle can also be seen on wikipedia web site. a. If the area of the entire square equals 1 unit, label each piece with its ...

### joint heirs college, Fola agoro, shomolu Lagos.

CHEMISTRY (1) What is the equation for reaction when calcium oxide and coke are heated in electric furnace (2) what solid remains when the following is heated-(a) lithium trioxonitrate (v), (b) potassium trioxonitrate (v), (c) calcium trioxonitrate (v). (3) addition of water ...

### Chemistry

What are the five(5) indications that show that a reaction has taken place? Thanks

### Bio lab question 2

What does adding an acid to an enzyme do to a reaction?

### science

write the balaced half-reaction for the conversion of Fe(s) to Fe2+(aq)

### chemistry

write the balanced half reaction for the conversion of Cl2(g)to Cl-(aq)

### chemistry

what type of reaction is 2KCLO3+heat-2KCL+3O2

### chemistry

The equation Mg(s) 2HCl(aq)---MgCl2 (aq) H2(g) is an example of which type of reaction?

### US history

what was the parliament's reaction to the Boston Tea Party of 1773 ?

### science

what is the difference between a chemical reaction and physical separation.

### science

how the particals behave in the reaction between iron and suiphur

### chem

Why do we have to remove air bubbles in a chemical reaction?

### AP Chemistry

What is the redox reaction of (i don't understand how to do this): MnO4-(aq) + H2O2(aq) -> Mn2+(aq) + O2(g)

### economics

can one determine that a project was successful by the customers reaction?

### 12th grade

5 factors that affect the rate of a chemical reaction

### English

Contrat the reaction of Hamlet, Laertes to their father's death.

### organic chemistry

how do you increase the yield of triphenylmethanol in a grignard reaction?

### organic chemistry

how do you increase the yield of triphenylmethanol in a grignard reaction?

### Chemistry

Classify each reaction and balance the equations. Al(OH)3 ==> Al2O3 + H2O

### chemistry

classify each reaction and balance the equation Al(OH)3--> Al2O3 + H2O

### chemistry

G naught doesnt tell you whether the reaction is spontaneous or not

### chemistry

n the reaction 2CO(g) + O2(g) ® 2CO2(g) what is the correct expression of the rate?

### Chemistry

NH4+ + OH- NH3 + H2O What is the K for the reaction above in terms of Ka's, Kb's, Kw etc.?

### Chemistry

H- + C6H5CH2COOH = H2O + C6H5CH2COO- What is the K for the reaction above in terms of Ka's, Kb's, Kw etc.?

### Chemistry

OH- + C6H5CH2COOH H2O + C6H5CH2COO- What is the K for the reaction above in terms of Ka's, Kb's, Kw etc.?

### chemistry

If a reaction mixture contains 28 of , 150 of , and 36 of , what is the limiting reactant?

### Chemistry

What is the balanced equation for the reaction of 3.000 g of K2CO3 and HCl?

### chemistry

how can AgCl(s) be dissolved completely? write an equation for the reaction

### chem

is An antacid neutralizes stomach acid. a chemical reaction?

### Chemistry

How many grams of Ni(OH)2 are produced from the reaction of 45.0mL of 1.75 M NaOH solution?

### chemistry

equation of the reaction of hydrochloric acid and iron sulphide

### college chemistry

How many grams of Mg(OH)2 can be prepared from the reaction of 20.0g of Mg3N2 with 10.0g of H2O?

### Chemistry

What is the theoretical yield of PI3 from the reaction of 27.0 g of P and 68.0 g I2? 2P(s)+3I2(s) 2PI3(s)

### chemistry

If you have 64.3 g NH3, how many grams of F2 are required for complete reaction?

### Chemistry

What is the rate law of the reaction 2NO2 gives N2O4?

### science

what is the difference between a physical change and a chemical reaction

### chemistry

What are the products of a reaction between NaCl, HNO3, and AgNO3?

### Chemistry

what is the equation for the reaction of Cu(NH3)subscript2(SO4) with NaOH?

### chemistry

given reaction at equilibrium, if Kp=1.05 at 250 degree celcius, then kc =

### Science

Write a mechanism for the aldol reaction of 3,3-dimethyl-2-butanone.

### Chem4

For the reaction A + 1/2 B --> 2 C, when C is increasing at a rate of 0.018 M/s, how fast is B decreasing?

### apchem

can someone explain the synthesis reaction from ethane to acetylene?

### Chemistry

Consider the reaction: N2(g) + 3H2(g) ¡ú 2NH3(g) question: calculate ¦¤S¡ã in J¡¤K-1.