# Posts by anna

Total # Posts: 2,686

**chemistry**

1. In the reaction 2Ca(s) + O2(g) → 2CaO(s), which species is oxidized?

**chemistry**

is that correct?

**chemistry**

i got 29.9646 from your explaination on 1

**chemistry**

1. is incorrect, it is not .270, i have one more chance on my practice sheet to answer this. 2. was good, thanks

**chemistry**

mxl=270 so the answer to 1. is 270? so the answer to 2. is S2-? so the answer to 3. is 6.3875?

**chem**

would it be 17/20.0=?

**chemistry**

can some one let me know if i am right or wrong please

**chemistry**

1.14?

**biology**

THANK YOU!

**SOMEONE HELP PLSS**

HELPP

**biology**

Which of the following processes releases energy to be used by a cell? a phosphate group is added to ATP to form ADP. a phosphate group is removed from ADP to form ATP. a phosphate group is added to ADP to form ATP. a phosphate group is removed from ATP to form ADP. not sure ...

**AP Physics**

A large box has a mass of 500kg and the coefficient of static friction for the box and the floor is 0.45, and the coefficient of kinetic friction is 0.30. a. What is the minimum horizontal force needed to get the box moving? b. If you continue to push with that force, what ...

**AP Physics**

A mystery surprise box is sliding down a ramp at a constant speed. The box has a mass of 55.0kg and the ramp makes a 40.0œ angle with the horizontal. What is the coefficient of kinetic friction between the box and the ramp? Please help asap. Thank you.

**Art**

I personally think it's a because art has many different subjects as I've learned in my art class as I've gone through each lesson with art related to math or social studies so I think it is most likely A ;)

**Art- plzz help**

B A A C D B C C There you go 100% guaranteed :)

**Art- plzz help**

I am too but I will give you the answers after i take it just for you ok? :) <3

**maths**

School for jan started at 9:00am finished at 3:00pm.If Jan knew she was 2/3 of the ay through the school, what time was it then?

**pre algebra**

Good job. I thought it was 17.

**math**

I think it is 300

**global**

where do lines of longitude intersect on the globe?

**geography..please check my answers!!!**

LUN IS 100%

**science/physics**

just trying to find out what temperature the water in my celcius heating system needs to be to achieve an air tempature of 68 degrees ferinheidt

**Chemistry**

That's the problem. I was able to get the second part but cannot figure out the top. I have (P + 2.6688)(4.5 - 0.13356) = 144.453 4.366 P - 11.653 = 144.453 P = 35.755 atm but that isn't right.

**Chemistry**

Use the van der Waals equation of state to calculate the pressure of 3.60 mol of NH3 at 489 K in a 4.50-L vessel. Van der Waals constants can be found here. P= Use the ideal gas equation to calculate the pressure under the same conditions. P= I have tried absolutely everything...

**Science**

Thanks so much @Anon I got a 100%.. I got these answers b4 I just thought I was wrrong haha

**MATH CHECK PLEASE**

Did you even attempt to do the first one? The first one is eight. First, you multiply $0.65 by 5. Then you multiply $2.25 by 5. You subtract the multiple of $2.25, which is 11.25, by the multiple of $3.25, and you'll get eight. Please try next time instead of guessing.

**english**

stupid Reed

**stoichiometry**

An ore contains Fe3O4 and no other iron.The iron in a 39.5-gram sample of the ore is all converted by a series of chemical reactions to Fe2O3. The mass of Fe2O3 is measured to be 26.7 g. What was the mass of Fe3O4 in the sample of ore? Answer in units of g.

**STATISTICS**

actually for part e I think it may be 0.8

**STATISTICS**

A salesperson contacts eight potential customers per day. From past experience, we know that the probability of a potential customer making a purchase is .05. b.) What is the probability the salesperson will make exactly two sales in a day? this is what I think the answer is 0...

**Social Studies**

100% Thanks. I thought 3 was D, too.

**Math**

Draw two number lines that show 0.20 and 1/5 are equivalent

**maths**

Anna picked 6 cards from these 10 digit cards to form a 6-digit number: 0 1 2 3 4 5 6 7 8 9, then asked Ola to guess what number she made. 1.Only the first digit is an odd number.2.The digit in the ten thousands place is twice the digit in the ones place.3.The number is 800 ...

**Pre-Cal**

A drone 125 ft high sights a landing pad with an angle of depression of 15 degrees. what is the horizontal distance between the drone and the landing pad? I tried all the methods set it up multiple ways, and I'm at a loss. My teacher said the answer is 466.5ft.. but how? ...

**science**

B A B A D assured 100% :) :3

**Physics**

A skier speeds down a smooth ski slope which is at an angle of θ = 21° with the horizontal. The mass of the skier is 75 kg. Take the downhill direction to be positive and uphill to be negative. What is the net force acting on the skier? Ok, so I have set up these ...

**2nd Law Physics**

You fashion a sling shot with a rather long and wide rubber band and practice hurling pebbles. You pull back on the center of the band with a force of 2.31 N. The angle between the two halves is 107°. What is the tension in the band? I get the gist of setting up Newton'...

**Science**

The answer is spores. Seeds is the main differ you idiot.

**Math**

Gisela has 135 cds 11 are pop music she has 3 times as many rocks cds as she had classical how many rocks cds does she have?

**chemistry (Physchem)**

Calculate the standard heat of reaction at 250C (298K) and 1 atm pressure of 3FeO(s) + 2Al(s) → Al2O3(s) + 3Fe(s) in terms of per mole of Al2O3 formed, per mole of Fe formed, per mole of FeO reacted, per mole of Al reacted and per g of Fe formed. ΔH298K,FeO(s) = -63...

**Physics**

A mover has to move a heavy sofa of mass 146 kg to the second floor of the house. He uses a rope to pull the sofa up a ramp from the first to the second floor. As he pulls the sofa he makes sure that the rope is parallel to the surface of the ramp which is at 30.0° to the ...

**social studies**

No mam I do understand a little bit of it but i do not get all of it so it confuses me a lot

**Math**

The next palindrome is 27072. So 27072-26962 = 110 So 110km/2h So 55km/h

**math**

What is the commission on a sale total of $300,000 if you keep 8%? help!

**Social Studies**

1. D 2. B 3. A 4. D 100% Guaranteed ;)

**Math**

The fence in David's backyard is 14 feet 5 inches long how many total inches is that

**Career**

It's A

**Chemistry college**

You are given a recipe for a buffer that contains 5% (w/v) MgSO4.7H2O. However, you only have MgSO4 anhydrous available to you. How much MgSO4 anhydrous do you need to make 0.5L of the buffer with the same molar concentration as in the recipe? Show your calculations

**physics**

A 10.0 microCoulomb point charge is fixed in place at the origin. A 2.00-microCoulomb point charge is released from rest at x = 0.500 m. Because of the repulsive force between the two point charges, the 2.00-microCoulomb charge is accelerated in the +x direction. What is the ...

**chemistry**

Hi! Can you please check if my answers are correct? And, can you please tell me any other details you think are important to add. Also, the last two questions i have no clue how to answer. can you help? thanks so much! 3.A burning candle produces a luminous flame. What is the ...

**chem**

If you have a properly adjusted hot flame, which is pale blue with three distinct cones, what is observed if the gas control valve is slightly closed? Explain.

**Math**

by 3 pm the temperature had increased by another 5 degrees. was the temperature at 3pm positive or negative

**Chemistry**

I'm having trouble turning mM to mOsmoles. The equation goes like this: red blood cell are placed into a beaker filled with .5L of a 150mM NACL solution. NACL is non-penetrating solute and will not cross the red blood cell membrane. I have 150mM/0.5L * 2mOsM/100mM But ...

**math**

4 red and 16 green the question refers to green not red

**Language Arts**

1. B 2. A 3. C I just took the test, these answers are correct 100%

**Math**

Hello every one its Anna:) I just wanted to say that Jesus loves you all no matter if you are big or small!

**Physics**

A constant force of friction of 50 N is acting on a body of mass 200kg moving initially with a speed of 15m/s. How long does the body take to stop? What distance will it cover before coming to rest?

**Geometry**

A square football field 3 mi. wide.

**Solving Geometry Formulas**

If the perimeter of a rectangle is 48 ft. and the width is 9 ft., what is the length of the rectangle?

**Solving Geometry Formulas**

The perimeter of a rectangle is 56 meters. If the width of the rectangle is 7 meters, find the length.

**Intro to Algebra- Geometry**

2 cans will be needed.

**Intro to Algebra- Geometry**

A sail on a sailboat has a base of 10 ft. and a height of 18 ft. and needs to be sealed with water repellent. One can of water repellent will cover 50 sq. ft., how many cans will be needed to cover the sail?

**Intro to Algebra**

Sally is making a tablecloth and wants to put lace around the edges. How much lace will she need to purchase if the radius is 1.5 ft.

**Probability and statistics**

The hydrocarbon emissions at idling speed in parts of million (ppm) for automobiles of 1980 and 1990 model years are given for 20 randomly selected cars. 1980 models: 141 359 247 940 882 494 306 210 105 880 200 223 188 940 241 190 300 435 241 380. 1990 models: 140 160 20 20 ...

**english teachers?**

are there any english teachers on here at this time?

**Biology**

I have any idea for these.

**Biology**

1) Microscopic hairs of the windpipe are always __________. 2) The cilia of the windpipe move harmful substances __________. 3) You build a heavy gust of air when you __________ or __________. 4) Coughing and sneezing help push harmful substances from the __________.

**Biology**

1 hair 2 mucus 3 mucus

**English**

I am writing a 300 word short story(or a "'personal' narrative essay") for the prompt: lessons we learn affect one's future. So far I have a general idea: I want the lesson to be loyalty and truth and I want the effect to be that the character would learn...

**Physics**

So we did this lab about how we are to measure the half life of the beta decay of indium 116 (the indium 116 is captured by indium 115 and undergoes beta decay to become tin 116. Since the Indium 116 I reused I understand that every time we use it, the indium 116 becomes a ...

**Physics**

The Golden Gate Bridge in San Francisco has a main span of length 1.28 km, one of the longest in the world. Imagine that a steel wire with this length and a cross-sectional area of 4.00 x 10-6 m^2 is laid on the bridge deck with its ends attached to the towers of the bridge, ...

**Physics**

What is the significance in the observation of discrete spectral lines in the emission spectrum of hydrogen??

**Physics**

A converging lens has a virtual object located a finite distance away. Which of the following must be true? (Select all that apply.) a) f > q b) The image is virtual. c) p < 0 d) The image is real. e) p > 0 Hi, can someone explain which is correct or incorrect? Thank ...

**English**

I am just about the processes of writing a short story and I am looking for a word/phrase that can properly describe a departure, without a destination(I am not going to specify anything to reflect the tone and theme of my story) that is just taken based on whim and for self ...

**Physics**

A pair of speakers separated by distance d = 0.900 m are driven by the same oscillator at a frequency of 670 Hz. An observer originally positioned at one of the speakers begins to walk along a line perpendicular to the line joining the speakers as in the figure below. (a) How ...

**Physics**

A pair of speakers separated by distance d = 0.900 m are driven by the same oscillator at a frequency of 670 Hz. An observer originally positioned at one of the speakers begins to walk along a line perpendicular to the line joining the speakers as in the figure below. (a) How ...

**Physics**

I did a lab about Standing waves on a string and it asked me the following qeuestions: Discuss any errors arising from the method used to establish the standing wave pattern. - I think air resistance, linear density of string is non uniform, tension of the string is not ...

**Physics**

Suppose you have a string that is being made to vibrate at a specific frequency, f. The speed of waves on the string is v. The length of the string that is vibrating, L, is adjustable. When the length of the string has been adjusted so that the fundamental standing wave ...

**Physics**

thank you!

**Physics**

A stretched string is attached to an oscillator. On which of the following quantities does the wavelength of the waves on the string depend? Select all that apply. The choices are: A) The frequency of the oscillator. B) The tension applied to the string. C) The amplitude of ...

**Math**

Wait! Nevermind, figured it out! Use linear equation right?

**Math**

Which of the following equations gives the relationship between S and T in the table below? S 1 2 3 4 5 6 T 1 4 7 10 13 16 How do you find equations again?

**Math**

1. Cate went on a trip of 120 miles at x miles per hour. Returned over same route at 5miles/hour faster than previous rate.If time for return trip was one-third of an hour less than time for the outgoing trip,how do you find x? (Set up the chart right, and used the time column...

**Math**

PLease explain how to do this Add or Subtract (m^2-m+3)+(m-1)

**Math**

I brought a book and paid $1.80 in sales tax. If the tax was 8%, what was the cost of the book. How do I solve this problem?

**Language Arts**

Each day, Wyatt created both humorous and touching poetry in his attic room. his attic room both humorous and touching poetry Each day in his attic room

**ss**

That link didn't help at all. If you could, every once in awhile, JUST GIVE A BALLPARK FIGURE, and stop sending stupid links.

**LA the giver chapters 1-2**

just to make it easier, all of the answers are: 1. b, d 2. c 3. b 4. d

**english**

Please place all of the chairs in the middle of the room.

**Language Arts**

Hello

**Language Arts**

To tell Miekos grandmother that mieko should stay home from school.

**math**

Me is 100% correct. Thanks a bunch.

**Spanish**

Thank you so much Sra. You are always so kind to help.

**Spanish**

Sra. does this essay look ok? It is comparing the Hispanic views on death and the US view. Cultura hispana celebra la muerte de muchas maneras, mientras que la cultura americana creo que es demasiado triste para la vida diaria. La vida para los hispanos es difícil. La ...

**math**

yEAH, Student stop being a HATER

**Computer Architecture!!**

How can we find the value in decimal stored in the AC register, after executing the MARIE program

**Math**

Amy is 100% correct for Connections Academy students. =)

**Chemistry**

for anyone else needing this info it is b

**Chemistry**

so is it a b or c

**Chemistry**

then you must times it by two so it would be .0144