Wednesday

April 23, 2014

April 23, 2014

Total # Posts: 200

**chemistry urgent**

I think I balanced these equation right please check and let me know. i am suppose to complete and balance the equations representing the reactions. NaHCO3 (s) + HCL (aq) >>>> NaCl + 2CO+H2O CaCo3 (s) + HCL (aq)>>> CaCl + CO3H Thanks

**Chemistry URGENT/DR BOB**

Can someone may sure that I balanced the following groups of equations correctly. Write an equation to show how acetic acid reacts with water to produce ions in solution. C2H4O2 + H2O >>>>>>> H3O + C2H3O Write an equation for the neutralization of HCl and ...

**chemistry**

I want to know if someone could let me know if I have written my balanced equations correct for the following questions. Write a balanced equation for the reaction of zinc with sulfuric acid. Zn + H2SO4 >>> Zn(S04) +H2 Write a balanced equation for the reaction of mag...

**chemistry**

I am unsure about balancing equation I would like for someone to let me know if I am working this out correctly? I have to write a balanced equation for the reaction when solid magnesium is added to a solution of lead(ii)nitrate, solid lead forms and the magnesium disappears a...

**chemistry**

I have to write a balanced equation for the reaction of a solid lead being added to a solution of silver nitrate. Solid silver forms and the lead disappears as it goes into the solution as lead (ii) nitrate. I think it should be Pb + AgNO3 >>>> Ag + Pb(NO3)2 does t...

**chemistry**

I have to write a balanced equation for the decompostion of solid copper (ii) sulfate to form the gaseous sulfur trioxide and solid coper (ii) oxide. I would appreciate it if you could tell me if I have written it correctly. CuSO4 >>> SO3 + CuO If I did not write this...

**chemistry**

is 3M less or more concentrated than 9M of sulfuric acid? I think that 9M is more concentrated but I wanted to make sure. thanks

**CALCULUS ECONOMICS**

correct!!!! thnks dude

**CALCULUS ECONOMICS**

wrong !!!

**abnormal psychology**

Is this true or false Abnormal psychology examines the concept of “differentness.” The spectrum of “differentness” is narrow in scope when compared to other areas of psychology.

**abnormal psychology**

Is this true or false With regard to life transitions, adolescence appears to be a time of particular stress because of the many changes that occur.

**abnormal psychology**

Is this true or false Behavioral medicine and health psychology are concerned with reducing the stress of illness but not necessarily preventing the stress.

**Math :(**

I'm having a hard time with the "no solution" problems. I'm still trying to find an answer when clearly there's none. Thank you

**Math :( **

2b=b+2+b 2b= 2b+2 -2b=-2b+2 __________ B=2????

**Math**

Thank you.

**Math**

2(4m+6)=8m+6 8m+12=8m+6 -6= -6 _________ 8m+6= 8m -8m. =-8m __________ 6=m I think in doing something wrong just not to sure when I check both sides give me different answer can someone explain please

**Math**

Five more than three times a number is 196 what is the number?

**Math**

kjhjy;l;

**Math**

kjhjy;l;

**Math-Data Management**

In a random Sample of Canadians 30% have Beeburr CD's (B) 35% have Fergie CD's (F) 55% have Motorhead CD's (M) 5% have B and F 10% have B and M 10% have F and M 95% have at least one artist place in Venn Diagram Find Number and Describe: a) _____ n(BuFuM) b)Exactly...

**Math 0098**

Last year, Deon had $20,000 to invest. He invested some of it in an account that paid 6% simple interest per year, and he invested the rest in an account that paid 10% simple interest per year. After one year, he received a total of $1880 in interest. How much did he invest i...

**Math 0098**

I dont think I'm doing this right because i am getting HUGE numbers like 156,000

**Math 0098**

it would be 7x+7y=70000? I dont know how to solve the two equations

**Math 0098**

it would be 7x+7y=70000? I dont know how to solve the two equations

**Math 0098**

it would be 7x+7y=70000? I dont know how to solve the two equations

**Math 0098**

where did you get .08 from?

**Math 0098**

Last year, Joe had 10,000 to invest. He invested some of it in an account that paid 7% simple interest per year, and he invested the rest in an account that paid 9% simple interest per year. After one year, he received a total of $860 in interest. How much did he invest in ea...

**Math 0098**

Last year, Joe had to invest. He invested some of it in an account that paid simple interest per year, and he invested the rest in an account that paid simple interest per year. After one year, he received a total of in interest. How much did he invest in each account?

**math**

the paralle side of trapezium are 20m and 30m and its non-paralle sides are 6m and 8m .find the area of trapezium

**Modern world studies**

Give me 5 trace rise of japan from an isolated society to major industrial and imperial power.

**Modern world studies**

Write a short paragraph that traces the rise of japan from an isolated society to major industrial and imperial power.

**check geo **

the us is a leading exporter of a.oil natural gases b.rice products c.beef and grain. d.cranberries and rasberries

**chemistry**

8905=80(x)(200) and solve for x

**physics**

The electron in a hydrogen atom with an energy of -0.544 eV is in a subshell with 18 states. What is the principal quantum number, n, for this atom? What is the maximum possible orbital angular momentum this atom can have? Is the number of states in the subshell with the next ...

**physics**

An electron drops from the L shell to the K shell and gives off an X-ray with a wavelength of 0.0205 nm. What is the atomic number of this atom?

**physics**

Mars Rover When the Mars rover was deployed on the surface of Mars in July 1997, radio signals took about 12 min to travel from Earth to the rover.How far was Mars from Earth at that time?

**physics**

What is the rms value of the electric field in a sinusoidal electromagnetic wave that has a maximum electric field of 64 V/m?

**physics**

A 9.2V battery is connected in series with a 33mH inductor, a 190 Ohms resistor, and an open switch. A)What is the current in the circuit 0.140 ms after the switch is closed? in milli amps b)How much energy is stored in the inductor at this time? in micro joules

**physics**

A circuit consists of a 12.0 V battery connected to three resistors 44 ohms, 15 ohms and 120 ohms in series. A)Find the current that flows through the battery. B)Find the potential difference across the 44 Ohms resistor. C)Find the potential difference across the 15 ohms resis...

**chemistry**

Find the mass of urea needed to prepare 51.7 g of a solution in water in which the mole fraction of urea is 7.59×10−2. anyone have the same values?

**physics**

A uniform electric field of magnitude 2.80×10 ^4 N/C makes an angle of 37 degrees with a plane surface of area 1.40×10−2 m^2. A)What is the electric flux through this surface? N * m^2/C

**physics**

The electric field at the point x = 5.00cm and y = 0 points in the positive x direction with a magnitude of 10.0 N/C. At the point x = 10.0cm and y = 0 the electric field points in the positive x direction with a magnitude of 16.0 N/C. Assume this electric field is produced by...

**physics**

An object with a charge of -4.5 micro C and a mass of 1.1×10−2 kg experiences an upward electric force, due to a uniform electric field, equal in magnitude to its weight. A) Find the magnitude of the electric field. B)Find the direction of the electric field. upwar...

**physics**

Two point charges, the first with a charge of +3.04×10−6 C and the second with a charge of -4.63×10−6 C , are separated by 22.5 cm. Find the magnitude of the electrostatic force experienced by the positive charge. Is the magnitude of the force experienc...

**Math**

Equation Models Question Symbolic Model 2x+3=(-5) Answer and check the solution please.

**Math**

Well thank you very much Ms.Sue i appriciate it. Have a great day or night!.

**Math**

How would you use 2x+3=(-5) in a symbolic model? same things as we have been doing.

**Math**

Thank you!! Thank you!!

**Math**

Does (-18) balance with (-6)+ 3(-4)? Show work to answer please

**Math**

Need help understanding 2010-2011 Transitional Unit: 06 Lesson 01- Unit: 05 TESCCC source It is called Maintain Your Balance Can someone please help?

**Math**

Thank you sooooo much! You ROCK!

**Math**

Write the first five numbers for the sequence that follows the rule 1/4x+3

**physics**

Water flows through a horizontal tube of diameter 2.9 cm that is joined to a second horizontal tube of diameter 1.5 cm. The pressure difference between the tubes is 7.2 kPa. Find the speed of flow in the first tube.

**physics**

Water flows through a horizontal tube of diameter 2.9cm that is joined to a second horizontal tube of diameter 1.5 cm. The pressure difference between the tubes is 7.2 kPa. A)Find the speed of flow in the first tube.

**physics**

A 5.2 m wire with a mass of 86 g is attached to the mast of a sailboat. If the wire is given a "thunk" at one end, it takes 0.085 s for the resulting wave to reach the other end. Part A What is the tension in the wire? Would the tension found in part A be larger or s...

**physics**

In a pig-calling contest, a caller produces a sound with an intensity level of 110 dB. How many such callers would be required to reach the pain level of 120 dB?

**geomatry**

the measure of one angle of a linear pair is 3 thimes the measure of the other angle. find the measures of the two angles

**Physics**

a car travels at 20km/h for 1.5h, at 30km/h for 2.0h, and at 40kmh for 0.75 h. What is the car average velocity

**math**

how about if the raduis of right circular cone is given and the surface area is given what is the formula? help please?

**Physics**

3. The mortar shell was short and you cannot change the explosive charge. You determine that a horizontal velocity of 1,592 feet per second will put the mortar shell. What angle should the mortar be elevated to?

**math**

$0.50

**music**

was schubert a romantic or classic composer?

**chemistry **

Sn1 / Sn2 mechanism: which one is faster and why? And which reactions will be quicker: neucleophilic subsitution with iodoalkanes or fluoroalkanes and why? thanks

**Chemistry**

They are both basic (pH is more than 7) but sodium bicarbonate is a weak base, and magnesium hydroxide is slightly stronger

**kahyla**

Maybe this helps: log(AB) = log(A) + log (B) so for question 1, ln(8x) is ln(x) + ln (8) log(2y)^5 is 5*log(2y) = 5*(log2 + logy)

**psychology**

Can you describe the specific behaviors. Describe the context in which the behaviors occurred.

**psychology**

what are the basic concepts of human interaction from a psychology perspective. In your examination, describe at least two examples of how human behavior changes based on social situations

**Math**

Mrs tan baked some muffins and packed them i big and small boxes for sale.Each big bbox contained 4 muffins and each small box contained 2 muffins.At first,there were 4 times as many small boxes as big boxes.After she had sold half of the small boxes and some big boxes,she bak...

**chemistry**

a sample of unknown gas is found to have a volume of 479 mL at 27.0 degrees C and 1.30 atm. How may moles of gas are int eh sample?

**chemistry**

So do I have to do any conversions, say to moles or just take the sum of the values as is since the answer has to be in mm Hg?

**chemistry**

A typical air sample in the lings contains oxygen at 100 mm Hg, nitrogen at 573 mm Hg, carbon dioxide at 40mm Hg and water at 47 mm Hg. What is the total pressure on the sample in mm Hg?

**algebra 1**

what is the smallest solution to 4(x -1) > 16

**algebra 1**

heip me I tried everything 4(x -1) > 16

**algebra 1**

thanks

**algebra 1**

help me please What is the smallest solution to the inequality 4 (x -1) > 16?

**algebra 1**

can someone help me solve this equation 5x - 12 < 20

**Chemistry**

84.94moles

**Chemistry**

A single mole of AgNo3 weighs 169.88 grams. In order to make a 1M solution, how many grams of AgNo3 would need to be dissolved in 5oomL?

**Chemistry**

Calculate the molarity of 1.77 mol of LiCl in 30.6 L of solution. This is for hw thats submitted online. the answer i got is 0.06 M. but it says its wrong, whyyyyy?

**algebra 1**

after diving 90m below the sea level, a diver rises at a rate of 4 meters per minute for 8 min. Where is the diver in relation to the surface

**algebra 1**

help please this question is driving my crazy. Suppose there is a 2-degree drop in a temperature for every thousand feet that an airplanes climbs into sky. If the temperature on the ground is 65 degrees, what would be the temperature when the plane reaches an altitude of 23,00...

**algerbra1**

translate to an algebraic expression 49 less than b

**physics**

The speed of a train increased from 15 mi/hr to 25 mi/hr in a distance of 500 ft. Calculate the average acceleration in ft/s2.

**physics**

1.The speed of a train increased from 15 mi/hr to 25 mi/hr in a distance of 500 ft. Calculate the average acceleration in ft/s2. 2.An airplane taking off from a landing field has a run of 500 m. It starts from rest, moves with constant acceleration, and makes the run in 30 s. ...

**health**

Which organization would you call if you were involved in a natural disaster?

**chemistry**

what would be the mass of an Au sample whose volume is 2.85mL?( the density of gold is 19.3g/mL)

**chemistry**

what would be the mass of an Au sample whose volume is 2.85mL?( the density of gold is 19.3g/mL)

**l2l**

If I had 10 trees and i had to plant them in 5 rows of 4 how would it work i need to do this

**bio**

Does the rate of respiration change (i.e. the rate of expansion) when one puts more oil in a dough? Would respiration occur faster?

**Philosophy**

There is no absolute distinction between what is true and what is false. Discuss this claim...

**poisson distribution math**

Mr Lee is planning to go fishing this weekend. Assuming that the number of fish caught per hour follows a Poisson distribution with mean 0.6, find the number of complete hours that Mr Lee needs to fish so that the probability of catching more than two fish exceeds 80 %.

**Literature - The Metamorphosis**

The Metamorphosis is a novel by Franz Kafka which has lots of religious symbolism. For example, when an apple is thrown at Gregor and embedded in his skin. I heard that in religious symbolism, apple terms for sin. What, however, is the significance when the apple rots away? Do...

**biology**

What diseases can mitochondrial DNA cause? Are they hereditary?

**English poem**

What is the interpretation of this poem? It's from Seamus Heaney, and is entitled Blackberry Picking. Late August, given heavy rain and sun For a full week, the blackberries would ripen. At first, just one, a glossy purple clot Among others, red, green, hard as a knot. You...

**General Chemistry**

a) 45% C 50% H 5% 0 (I'm not sure what is meant with mass but this should be the percentage of how much of each element is present in the molecule...) b) since molecular formula of cinnamic acid is C9H10O, its molecular mass is (9x12)+10+16 = 134. This is the amount of g p...

**Chemistry**

Thanks!

**Chemistry**

I have troubles with a titration of NaOH and HCl. The volume of the HCl is 30 ml and its concentration is 0.1 mol per liter The volume of the NaOH is 25 ml and the concentration is to be worked out. I understand that the reaction ratio for HCl to neutralize NaOH is 1:1. But do...

**algebra**

Are both equations supposed to be set to zero???

**9th grade**

In, 1914 how many European nations controlled territory in Africa?

**social studies**

why did people settle in southern mesopotamia?