Wednesday
November 25, 2015

# Posts by anna

Total # Posts: 2,268

Chemistry
@DrBob222 Thanks! It really did help me understand it better
December 1, 2014

Chemistry
HW Help!!!! An object at 4500 K emits the blackbody spectrum shown here. This object emits the most light in the __?__ part of the visible spectrum.
December 1, 2014

Chemistry
The color of light emitted by a hot solid object depends on?
December 1, 2014

Chemistry
Given that many laboratory gases are sold in steel cylinders with a volume of 43.8 L, What mass (in grams) of argon is inside a cylinder whose pressure is 17810kPa at 24∘C? I've attempted this problem but I'm not getting the correct answer. Please explain if you ...
November 28, 2014

Chemistry
P= [14.5g*(0.0821L*atm/mol*K)*305K]/0.13L P=2792.98 P=2792.98*760mmHg = 2122664.8 g/mol*mmHg
November 28, 2014

Chemistry
If 14.5g of CO2 gas has a volume of 0.13L at 305K , what is its pressure in millimeters of mercury? I've plugged these values into the equation P=nRT/V but I am having troubles with canceling labels and getting the correct answer. Please explain as much as possible to me!
November 28, 2014

Spanish
Thank you so much! I hope you have a wonderful holiday.
November 26, 2014

Spanish
Thank you Sra. I tried these three again. You were correct they are too complicated. I sometimes feel I need to add more information than necessary. 14. ¿Qué Hizo el jefe de correos al leer la carta? Al leer la carta el jefe de correos recogido dinero para Lecho...
November 26, 2014

Spanish
Hola Sra. This one is a bit long. I hope they are correct. Part I Los pronombres relativos. Complete las oraciones siguientes en una manera lógica. Juan es el hombre a quien… Juan es el hombre a quien necesito dar el dinero. 1. Es un problema que… Es un ...
November 26, 2014

MATH!!
Joe and Susan invested \$1500 at Bank of America in 2000, at 4% compounded quarterly. In the year 2005 they moved to another city and took the total money from their investment added \$500 and invested in at Bank Bravo, at 5% compounded quarterly. a) What is the value of this ...
November 24, 2014

MATH!
Thank you very much!
November 24, 2014

MATH!
Barbara invested \$12,300 at the Midtown Credit Union at 6% compounded monthly for 7 years. What is the effective rate of this investment?
November 24, 2014

Social Studies
Which of the following is the largest ethnic group in china A.Han B.tibetan C. Uighurs D. Hui Which of the following is the staple crop of the north China plain A. Barley B. Rice C. Soybeans D. Wheat Crops grow well on the north China plain because the Huang river ___ A. Forms...
November 24, 2014

Chemistry
Use bond energy values to estimate delta H fro the following reaction in the gas phase: C2H4 + Br2 -> CH2BrCH2Br I am in dire need of help! Thank you
November 20, 2014

Spanish
Hola Sra. Are these correct? La tercera persona plural de pretérito. Cambie las formas entre comillas al pretérito según el ejemplo. Ejemplo: No “han podido” sacar dinero de la máquina. No pudieron sacar dinero de la máquina. Esos ...
November 20, 2014

Math
The ratio of guys to girls in the classroom is 8:1. There are 45 people in the classroom. How many of them are guys?
November 20, 2014

history
what proposal sought to unite the American colonies against the french
November 19, 2014

Math Elementary Linear Algebra
determine whether or not the given set forms a basis for the indicated subspace: #1 {1,1,0), (1,1,1)} for the subspace of R^3 of all (x,y,z) such that y= x+z #2 {[1,2,-1,3), (0,0,0,0)} for the subspace of R^4 of all vectors of the form (a,b, a-b,a+b) and #3 {(2,0,2), (1,1,1)} ...
November 16, 2014

math
when a traffic light turns green, a car accelerates at a constant rate, the decelerates in the same manner to stop at the next traffic light. The speed of the car, s, is given by the equation, s=-10 /t-8/ + 80 where t is time. Find the time , t, it takes for the car to reach ...
November 16, 2014

Math
show that the set of all m-vectors whose first components is 0 (of R^m)
November 16, 2014

Chemistry
What is the molarity of a solution prepared by dissolving 820. g of sodium phosphate, Na3PO4, in water and diluting to 2.89 liters? (atomic masses: Na = 22.99, P = 30.97, O = 16.00)
November 14, 2014

Spanish
Sra. do these look correct? ¿Cuánto tiempo hace que…? Conteste las preguntas utilizando frases completas en español. 1) ¿Cuánto tiempo hace que has escrito una carta a mano? ¿A quién la escribiste y por qué? Hace ...
November 14, 2014

geomerty
how to find the distance between each pair of points (0,3)and (3,-5)
November 14, 2014

Biology*STUCK*
1.b 2.c 3.c
November 12, 2014

Chemistry
Consider the evaporation of water at 298 K and 1 atm pressure: H20 (l) <---> H20 (g) Given that ΔGOrxn= 8.6kJ/mol, what is the equillibrium vapor pressure of water at 298 K?
November 10, 2014

Chemistry
Using the following data 1. CU3+ + 2e- ---> Cu+ E1= 1.28V 2. CU2+ + e- ---> Cu+ E2= 0.15V 3. Cu2+ + 2e- ----> Cu(s) E3= 0.34V 3. Cu+ + e- ----> Cu (s) E4= 0.52V calculate the standard reduction potential for the reaction of Cu(III) to Cu(II). Is it .783 V?
November 9, 2014

Chemistry
Please disregard this question. It's been answered: BaCl2 + Na2S \-> BaS + 2 NaCl
November 7, 2014

Chemistry
A salt may be prepared by the reaction of one salt with another salt, particularly if one of the products is insoluble. In which one of the following reactions is this demonstrated? (NH4)2CO3 + K2SO4 \->(NH4)2SO4 + K2CO3 CuCl2 + 2 NH4NO3 \-> Cu(NO3)2 + 2 NH4Cl Sr(NO3)2...
November 7, 2014

Chemistry
Thank you Dr. Bob, I appreciate your help. I will look at the link. :D
November 7, 2014

Chemistry
A salt may be prepared by the reaction of one salt with another salt, particularly if one of the products is insoluble. In which one of the following reactions is this demonstrated? (NH4)2CO3 + K2SO4 \->(NH4)2SO4 + K2CO3 CuCl2 + 2 NH4NO3 \-> Cu(NO3)2 + 2 NH4Cl Sr(NO3)2...
November 7, 2014

Chemistry
A salt may be prepared by the reaction of one salt with another salt, particularly if one of the products is insoluble. In which one of the following reactions is this demonstrated? (NH4)2CO3 + K2SO4 \(->NH4)2SO4 + K2CO3 CuCl2 + 2 NH4NO3 \->Cu(NO3)2 + 2 NH4Cl Sr(NO3)2 + ...
November 7, 2014

Spanish
Sra. do my answers look correct? Querida Abby… Complete el párrafo abajo por escoger una palabra lógica de la lista siguiente para llenar los espacios en blanco. Querida Abby, Tengo un problema. No sé qué debo ___(1)____. Recientemente, mi ...
November 7, 2014

chemistry
Rank the following elements by electron affinity, from most positive to most negative EA value: tellurium, bismuth, neon, sodium, iodine i tried Te, Bi, Na, I, Ne and it was incorrect.
November 6, 2014

chemistry
K(s)+NH3(g)→ ?
November 5, 2014

trigo
a bicycle has a front wheel with a diameter of 24cm and a back wheel with a diameter of 60cm. through what angle does the front wheel turn if the back wheel turns through 12 radians
November 5, 2014

Social Studies
Shawn Mendes is life <3 thank you for the answers too btw really helped me too !!
November 3, 2014

chemistry
Cloves contain two principal essential oils, caryophyllene and eugenol. A student carrying out a steam distillation using cloves obtained a mixture of these two oils in the distillate. Explain how the student could separate and isolate the two essential oils using liquid-...
November 3, 2014

chemistry
Limone (MW 136g/mol) is a pleasant smelling liquid found in lemon and orange peels. The boiling point of limonene is 175 ˚C, but it co-distills with water at 97.5 ˚C. If the vapour pressure of water at 97.5˚C is 690 mmHg, what percent (by mass) of the steam-...
November 3, 2014

chemistry
Aniline (MW93 g/mol) co-distills with water 98.2 C. The vapor pressure of water at 98.2 C is 717 mmHg. You need to isolate 10 g of aniline. What is the minimum volume of water required to isolate 10 g of aniline in a steam distillation at 760 mmHg?
November 2, 2014

Chemistry
A meteorological balloon contains 237. L of helium at 33. °C and 0.832 atm. If the volume of the balloon can vary according to external conditions, what volume would it occupy at an altitude at which the temperature is -57. °C and the pressure is 0.094 atm? (2 ...
November 1, 2014

Chemistry
Suppose 55.3 L of a gas is at a temperature of -73. °C. If its temperature is increased to 411. °C, what will its volume be then?
November 1, 2014

Spanish
Thank you so much Sra. My assignments aren't due until the following week. Never feel like you have to answer right away.
October 31, 2014

Spanish
Hola Sra ¡Feliz Halloween! Do my answers look right? Part I ¿Ingestión o intoxicación? Traduzca la conversación siguiente al español utilizando los tiempos compuestos como apropriado. Es importante usar el tono formal (Ud.) ya que una ...
October 31, 2014

Spanish
Sra. are these three correct? I have a short assignment this week. Thank you! Conteste las preguntas utilizando el pluscuamperfecto de indicativo según el modelo. Use el mismo verbo que se usa en la pregunta. Modelo: ¿Por qué no nos ha dicho la verdad ella...
October 23, 2014

L/A
Hi we're doing the same assessment if you ever got the answers could you give them to me?
October 22, 2014

Chemistry
How would you prepare 165 mL of a 0.976 M NaOH solution, starting with a 6.36 M stock solution? Volume of solution needed? Volume of water needed?
October 21, 2014

Algebra
I don't understand how to find the equation to solve this. A family drove two cars to a reunion. The first car traveled at 50 mph. The second car left 1 hour later and traveled at 65 mph. How long will it take for the second car to catch up to the first car?
October 21, 2014

algebra
has inherited \$15,000 that she wants to invest in two separate accounts, one paying 4% and one paying 3% annual interest. If the total interest earned for a year is \$550, how much should she invest at each rate?
October 21, 2014

science
what force is applied by Andre if he does 250 J of work as he pushes a box 19 M along the ground ?
October 19, 2014

Spanish
I'm so sorry. I did type #9 wrong. It is... Xavier, “quiero que le preguntes” al dependiente si hay un restaurante cerca. Xavier, __________ al dependiente si hay un restaurante cerca. My answer is: pregúntale Thank you so much for your help! It seems with...
October 17, 2014

Spanish
Sra. this week I had a review. Do my answers look correct? Part I Indique si las palabras en pares son sinónimos, antónimos, o no son relacionadas. 1. A ancho y apretado - antónimos B corto y flojo - no son relacionadas C vestirse y quitarse - antó...
October 17, 2014

Algebra
I still don't get it, where do I simplify at? Fractions aren't my strong point.
October 16, 2014

Algebra
Solve for x in each of the following: A: 2/3 = x/18 B: 3/x = 3x/x^2 I think I have the first one. I am clueless on the second one! HELP!
October 16, 2014

Chemistry
A compound containing boron and hydrogen has been synthesized. You perform two experiments to determine the molecular formula of the compound. A 0.492 g sample of the compound is burned in pure oxygen to produce B2O3 and 0.540 g of water. In the second experiment, when a 63.1 ...
October 15, 2014

Math
4.355
October 15, 2014

physics
A man threw a ball horizontally out of an elevator that was traveling upward at a rate of 5.50m/s. If the ball was thrown at a velocity of 10.5m/s when the elevator was 15.3m above the floor of the atrium. How far from the base of the elevator did it land?
October 15, 2014

math
Determine whether the fractions in each of the following pairs are equal: a: a^2/b and a^2b/b^2 b: 377/400 and 378/401 c: 0/10 and 0/-10 d: a/b and a+1/b+1, where "a" is not equal to "b" or a =/= b
October 14, 2014

Spanish
Sra. do these look correct? Part I Entonces, complete el diálogo telefónico en una manera lógica utilizando oraciones completas en español. 1. Dígame. Hola. ¿Puedo hablar con el señor Costa? 2. ¿De parte de quién? ...
October 10, 2014

B sometime
B sometime
October 9, 2014

Engineering
what heading must a pilot fly to compensate for a 125km/h west wind to have a ground track that is due south? The airecraft cruise speed is 600 km/h. What is the actual ground speed?
October 8, 2014

chemistry
How many moles of molecules are in 198 g of hydrogen nitrate (HNO3)? Answer in units of mol
October 6, 2014

Pre-Calc
1.) Suppose that y varies directly as x. If y is 5 when x is 30, the constant of variation is 150. True Or False 2.) If w varies directly as z and w = 9 when z = -6, find w when z = 3. 3.) If y varies directly as x and y = 2 when x = 4, find x when y = 4.
October 2, 2014

Spanish
Thank you for your corrections Sra. I am not sure why I was so confused about the second part. I thought I was using indicative imperfect but I was so wrong. At least the subject half was ok. As for gustar I should have known better. I always get tricked with that verb. Thank ...
October 2, 2014

Spanish
Sra. are my answers correct? Thank you so much for your time. Part I El condicional. Llene el espacio con la forma condicional del infinitivo dado. ¡Cuidado! Los acentos son importantes. 1. Mi esposo y yo _______ contigo, pero no nos sentimos bien. (IR) iríamos 2...
October 2, 2014

Math
if jerry bought 6 shoes for 85 dollars, how much would fred have to pay for 17 pairs at the same rate?
October 2, 2014

physics
A geosynchronous satellite is one that appears to be fixed in the sky, a condition useful for telecommunications. If such a satellite orbits the earth at an altitude of 33000 km above the earth's surface, what is its centripetal acceleration? The radius of the Earth is ...
September 27, 2014

physics
A basketball is thrown at 45° to the horizontal. The hoop is located 4.4 m away horizontally at a height of 1.1 m above the point of release. What is the required initial speed?
September 27, 2014

Spanish
Sra. would you look over my answers please? Part I. El subjuntivo con expresiones hipotéticas: Complete las frases siguientes utilizando EL SUBJUNTIVO. Ejemplo: No completaré la tarea hasta que... estudie los verbos. My answers are after the ... on each 1. Ser&...
September 26, 2014

math
Becky a saleswoman,is offered two salary plans. Plan 1 is \$450 per week salary plus a 3% commission of sales. Plan 2 in a \$300 per week salary plus a 16% commission of sales.How much would Becky need to make in sales for the salary to be the same from both plans?
September 23, 2014

math
where do you get 547 and 92 from?
September 23, 2014

math
A telephone long-distance carrier charges customers \$0.99 for the first 20 minutes and then \$0.06 for each minute(or any part thereof) beyond 20 minutes. If Mary uses this carrier,how long can she talk for \$4.00? I started off with 0.99x+20+0.06x=4.00. PLEASE help, I dont ...
September 23, 2014

math
when you divide the numerator of a fraction by the denominator you always get either a decimal that terminates or a decimal that repeats a digit or block of digits again and again
September 23, 2014

math
any number that can be expressed as the ratio of 2 integers a/b, where b does not equal 0, is a rational number
September 23, 2014

Spanish
Thank you so much Sra. Your explanation on making it sound the same is perfect! Much easier than breaking them down into syllables and working back one. Especially since I broke estudia into 4 syllables when it should be 3. As for the subjective I think I need more practice. I...
September 18, 2014

Spanish
Would it be possible to have Sra double check my answers? She was such a huge help last semester. Part I ¿Subjuntivo o indicativo? Completa cada oración con la forma correcta del verbo indicado. ¡OJO! No todas requieren el subjuntivo. 1. Esperamos que el ...
September 18, 2014

physics first year
The corners of a square lie on a circle of diameter 0.4 m. Each side of the square has length L. Find L.
September 17, 2014

chemistry
September 15, 2014

chemistry
Nickel is about 2 millimeter thick or 2/1000 of a meter.how many nanometer is this?
September 15, 2014

I really need help with this one question on my math pretests and I have no idea what to do! The question is: Mandy begins bicycling west at 30 miles per hour at 11:00 am. If Liz leaves from the same point 20 minutes later bicycling west at 36 miles per hour, when will she ...
September 14, 2014

I could really use some help with this problem because I'm pretty confused on what to do. The formula for the volume of a cone is V=1/3(pi)r^2h where v represents volume, r represents the radius of the base, and h represents the height. What is the height of a cone with a ...
September 14, 2014

Geometry
I could really use some help with this problem because I'm pretty confused on what to do. The formula for the volume of a cone is V=1/3(pi)r^2h where v represents volume, r represents the radius of the base, and h represents the height. What is the height of a cone with a ...
September 14, 2014

Please help me I beg of you! My math teacher is awful and I have no idea how to do my pretest and she's picky about showing my work so it would be helpful if you could explain :) 1.six is subtracted from a number. The result is devided by four. This result is added to 10 ...
September 14, 2014

Peter Singer argues that giving money to famine relief is: a. Morally permissible. b. Morally forbidden. c. Morally required. d. Supererogatory.
September 8, 2014

According to Kant, we have no direct duties to animals because they lack personal attributes such as___________. a. Rationality. b. Self-consciousness. c. Free will. d. All of the above.
September 8, 2014

Which one of the following philosophers believes that animals do not feel pain because they do not possess souls? a. Descartes. b. Pollan. c. Pollan. d. Leopold.
September 8, 2014

Advocates of animal rights claim that it is ________ to discriminate against animals merely because they are not human. a. Racist. b. Speciesist. c. Trivial. d. Moral.
September 8, 2014

Which of the following claims does Michael Pollan advance? a. Eating animal meat is never ethical. b. Eating animal meat is sometimes ethical. c. Animal liberation is a fringe idea. d. Animals do not possess a "characteristic form of life."
September 8, 2014

ethics
mmanuel Kant argues that we have _______moral duties to animals. a. No. b. Direct. c. Indirect. d. Innumera
September 8, 2014

ethics
According to James Shikwati, the most effective course of action that America and Europe can engage in to help Africa is: a. Earmark funds for a specific objective. b. Halt all development aid. c. Encourage aid organizations to employ Africans. d. None of the abov
September 8, 2014

ethics
According to James Shikwati, which of the following is a reason given in support of the conclusion that we must stop providing aid to underdeveloped nations? a. Development aid strengthens the local markets. b. Development aid encourages free trade. c. Development aid ...
September 8, 2014

ethics
According to John Arthur, a reasonable moral code would require us to: a. Give money to famine relief when there is no significant reduction in our own happiness, or the happiness of our family. b. Give food to our own children first, because they have a negative right to such...
September 8, 2014

ethics
Which of the following is the analogy employed by Peter Singer in his argument contained in Famine, Affluence, and Morality? a. The drowning child. b. The starving child. c. The sleeping child. d. The comatose child.
September 8, 2014

Math - Urgent
Uh I need help?
September 7, 2014

Math - Urgent
I borrowed 7 more dollars?
September 7, 2014

Math - Urgent
The air temperature is -10 degree Celsius. With the wind blowing at a speed of 15 km/h, this temperate feels like -17 degrees Celsius. How many degrees does the temperature change because pf the wind chill?
September 7, 2014

Math
The air temperature is -10 degree Celsius. With the wind blowing at a speed of 15 km/h, this temperate feels like -17 degrees Celsius. How many degrees does the temperature change because pf the wind chill?
September 6, 2014

Math
A tank is filling with water from a natural spring. Two days ago the water was 10 feet deep, and yesterday the water was 12 feet deep. Assume that the water depth continues to rise at this same rate after today
September 6, 2014

math
The least common multiple of two numbers Is 60 , and one of the numbers is 7 less than The other number. What are the numbers
September 4, 2014

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