Jennie

Two centuries ago there were more buffalo than cattle in the United States. Even though millions of cattle are killed for beef consumption each year, the catttle population continues to grow while the buffalo are virtually extinct. why? Explain in economi...

18 years ago

If your inital investment is $1000, and your rate of return is say 10%, did you make $100 or $1100 from your $1000?

17 years ago

I need help finding some major issues in new jersey! please help!

16 years ago

The "Critical Period" took place during the years when... w. the United States was governed by its 1st president x. George Washington served as the 1st president y. None of these answers are correct

16 years ago

Does anyone have any ideas for an UNpersuasive essay? Instead of doing a normal essay, my class is doing an essay on anything that's crazy that people would normally not believe but if I use facts and other information, maybe they might believe me. I want...

16 years ago

Joshua has a mass of 60kg and stands next to a wall ona frictionless skateboard. If he pushes the wall with a force of 30N, how hard does the wall push on him? Show that Joshua accelerates at .5 m/s2 away from the wall.

15 years ago

Is this statement accurate? the boiling point of the distilled water was 99°C. After five minutes, the temperature still stayed the same; it remained constant. The liquid was becoming a gas. Phase change means there is an energy change. When the temperatu...

15 years ago

How are the formation of aqueous solutions of sodium chloride and sucrose similar?

15 years ago

What affect does salt have on ice water? Is there a term for it and a website that explains this?

15 years ago

What is the average time interval between heartbeats? what is the average time between a hummingbird flaps its wing?

15 years ago

-2(x-2)=2[x-4(x-2)+x]

15 years ago

A wire carries a current north. Above the wire the magnetic field is directed _________. Is it east? You are looking at a coil carrying a current clockwise. The magnetic field at the center of the coil is directed _________. Is it right?

14 years ago

True or False. 1)Electrons give off light as they drop to lower energy levels. 2)Electrons travel around the nucleus as waves. 3)A photon of low frequency light has more energy than a photon of high frequency light. 4)Orbitals with equal energy levels eac...

14 years ago

A watch cost $75.99. If the sales tax rate is 6.25%, what is the amount of sales tax? Please show work or the explanation you used!

14 years ago

Write the expression as a complex number in standard form. 3-3i/4i I'm not sure about this problem, but I think the answer is -3/4i-3/4. Could anyone help me please?

13 years ago

You are standing 7 feet from one speaker and 13 feet from another. Both speakers are producing the same sound. If the combined sound from both speakers is especially loud at your location, which of the following could be the wavelength of the sound? Choos...

13 years ago

How many different arrangements can be made with the letters from the word ORANGE?

13 years ago

At the beginning of the week, an electronics store took count of how many tvs and radios there were in the stockroom. The manager found that there was a ratio of 3 tvs for every 2 radios. At the end of the week, the manager counted 24 boxes left in the st...

13 years ago

A 1N solution of NaOH is diluted 4/20 then rediluted 1:50. What is the final normality? How many grams of NaOH are present in 100ml of the final solution? I sort of understand the basic concept, but I don't really know how to do normality problems.

11 years ago

Consider the following chemical equation: TiCl4(g) + 2Mg(l) → Ti(s) + 2MgCl2(l) 3.54×107g of TiCl4(g) were reacted completely and 7.91×106g of Ti(s) was obtained in the experiment. a. Calculate the theoretical yield of Ti(s). b.What is the actual yield of...

10 years ago

Dr. Bob222, Yesterday I posted a question and you answered me with how to calculate it.. Can you tell me if I'm doing this correctly?? Please! Consider the following chemical equation: TiCl4(g) + 2Mg(l) → Ti(s) + 2MgCl2(l) 3.54×107g of TiCl4(g) were react...

10 years ago

Someone please tell me if I'm doing this right... It's due tonight!! Dr. Bob222, Yesterday I posted a question and you answered me with how to calculate it.. Can you tell me if I'm doing this correctly?? Please! Consider the following chemical equation: T...

10 years ago

Dr. Bob222 Please don't get frustrated with me, I'm really trying to figure this out... UGH!! I'm starting over again... Please advise... . Consider the following chemical equation: TiCl4(g) + 2Mg(l) → Ti(s) + 2MgCl2(l) 3.54×107g of TiCl4(g) were reacted...

10 years ago

Ok, Need some more help... This is what I have so far. 4. Urea (NH2)2CO is prepared by reacting ammonia with carbon dioxide. The byproduct is water. 637.2g of ammonia are reacted with 787.3 g of carbon dioxide. molar mass:NH3=17 CO2=44 CO(NH2)2=60.1 a. (1...

10 years ago

Ok, Need some more help... This is what I have so far. 4. Urea (NH2)2CO is prepared by reacting ammonia with carbon dioxide. The byproduct is water. 637.2g of ammonia are reacted with 787.3 g of carbon dioxide. molar mass:NH3=17 CO2=44 CO(NH2)2=60.1 a. (1...

10 years ago

DrBob222 You are an amazing person! I have received more help from you the past two days that I have this whole semester from my instructor! You have an amazing gift of breaking things down to understand completely! Where are you from? Do you get paid for...

10 years ago

UMM.. I keep coming up with the wrong answer? How do I calculate this? 1. Calculate the number of Li atoms in 9.9 moles of Li. Express your answer using two significant figures. 2. Calculate the number of CO2 molecules in 3.13×10−2 mole of CO2. 3.Calculat...

10 years ago

Dr. Bob222, Calculate the moles of C2H6 in 8.60×1023 molecules of C2H6. I did what you said, I got 8.60*10^23*(1mole/6.02*10^23) = 1.43*10^46??? This is not the answer.. am I doing something wrong?

10 years ago

Ok, I know how to balance chemical equations, however, I don't know how to tell if it is a S, L, aq, or g? How am I supposed to know this?? Mg(s)+AgNO3(aq)→Mg(NO3)2(aq)+Ag(s) Express your answer as a chemical equation. Identify all of the phases in your a...

10 years ago

Ammonia is produced by the reaction of hydrogen and nitrogen. N2(g)+3H2(g)→2NH3(g)ammonia How many moles of N2 reacted if 0.65mole NH3 is produced? How many moles of NH3 are produced when 1.2moles H2 reacts?

10 years ago

I'm having a brain malfunction... how to calculate how many grams are in a mole of something? How many grams are in 3.80mol of sodium chloride (NaCl)?

10 years ago

Need Help! 1. Ammonia is produced by the reaction of hydrogen and nitrogen. N2(g)+3H2(g)→2NH3(g)ammonia How many moles of N2 reacted if 0.65mole NH3 is produced? How many moles of NH3 are produced when 1.2moles H2 reacts? 2.In the acetylene torch, acetyle...

10 years ago

I need to know how to figure this out, step by step... Don't assume I know anything.. Break it down for me like I'm a 5 year old... I'm really horrible at figuring out where to even begin... what steps to use.. etc.. Thank you!! CO2(g)+4H2(g)→CH4(g)+2H2O(...

10 years ago

Calculate the mass of water produced when 3.09g of butane reacts with excess oxygen. 2C4H10 + 13O2-->10H2O + 8CO2 Help.

10 years ago

Ok, I'm trying my best here, I'm learning, and I'm thinking I'm on a roll, until I can't get the right answer again..... First.. the butane question Calculate the mass of Butane needed to produce 82.7g Carbon dioxide. 2C4H10 +13 O2--->10H2O +8CO2 Ratio is...

10 years ago

Balanced Equation: 2PbS+ O2 --> 2PbO +2SO2 How many grams of oxygen are required to react with 0.124mole lead(II) sulfide? Ummmm.. I tried to convert it to grams? 0.124 mol * molar mass of PbS (239.3) = 29.67 g of PbS then tried to plug it into the equati...

10 years ago

this is confusing me so bad!! Nitrogen gas reacts with hydrogen gas to produce ammonia by the following equation: N2(g)+3H2(g)→2NH3(g) If you have 5.79g of H2, how many grams of NH3 can be produced? I said, 2/3 *5.79 = 3.86 but that's not the answer.. it...

10 years ago

How many grams (of mass m) of glucose are in 355mL of a 5.50% (m/v) glucose solution? You have a solution that is 18.5% (v/v) methyl alcohol. If the bottle contains 2.49L of solution, what is the volume (V) in milliliters of methyl alcohol? A 6.00 % (m/v)...

10 years ago

Calculate the mass/volume percent of a NaCl solution in which 182g of NaCl is dissolved in enough water to give a total volume of 4.78L . Would I do 182/4780ml *100?

10 years ago

true or false??? The larger molecules dissolve best in a solvent with a low molecular weight.

10 years ago

WHAT???? which of these are electrolytes?? CH3CH2OCH2OH PCl3 Na2CO3 O2

10 years ago

I have no idea where to begin with this?? This class is moving so fast! Dr. Bob222 I made a 100 on my prelab!! and the online test was so fast I was going through my notes and I was scrambling to figure it out and look up stuff on the periodic table and a...

10 years ago

Dr. Bob, I just did a home lab with citric acid and sodium bicarbonate and had to put them in cups and measure before and after.. I put 1.02g of sodium bicarbonate in a cup with water and stirrer (54.66g) then added .77g of citric acid and supposed to add...

10 years ago

Now, I'm going to post how to figure out the theoretical yield of carbon dioxide from 1.00g sodium bicarbonate... The reaction of citric acid and sodium bicarbonate is written as H3C6H5O7(aq) + 3 NaHCO3(aq) → Na3C6H5O7(aq) + 3 H2O(l) + 3 CO2(g) Um.. I thi...

10 years ago

This is in response to the fact that my experiment had me come up with my own.. I was supposed to measure out as close to 1g as possible of sodium bicarbonate as possible.. This is my lab procedures: Plastic Cup A 1. Measure out 50 mL of distilled water w...

10 years ago

Plastic Cup B Mass of cup, water and stirrer: 53.75g mass of sodium bicarbonate: 2.02g mass of citric acid: 1.52g total mass of all: 57.29g mass of cup, solution, stirrer after reaction: 56.59g difference (CO2): 0.70 g Now, Here's the problems it's basica...

10 years ago

Ok, UMMMM I thought I was good.. Till now.. Ok, For Cup C Mass of cup,water,stirrer: 55.15 Mass of sodium bicarbonate: 2.02g mass of citric acid: 0.77g total mass: 57.94g mass of cup,solution, stirrer after reaction: 57.64 difference (CO2): 0.30g Part B:...

10 years ago

Ok, For Cup C Mass of cup,water,stirrer: 55.15 Mass of sodium bicarbonate: 2.02g mass of citric acid: 0.77g total mass: 57.94g mass of cup,solution, stirrer after reaction: 57.64 difference (CO2): 0.30g Part B: Limiting Reactants Plastic Cup C 7. Determin...

10 years ago

For Cup C Mass of cup,water,stirrer: 55.15 Mass of sodium bicarbonate: 2.02g mass of citric acid: 0.77g total mass: 57.94g mass of cup,solution, stirrer after reaction: 57.64 difference (CO2): 0.30g Calculate the theoretical yield of carbon dioxide in the...

10 years ago

Is a country with a trade surplus better off or worse off than a country with a trade deficit? Provide your rationale.

10 years ago

what's the answer to subject and object pronouns worksheet the directions is write each sentence replace the underlined words with subject or object pronouns

9 years ago

A clock gains s seconds in one hour. In its simplest form, write down an expression in term of s and d for the number of minutes it gains in d days.

9 years ago

Jasper's friend Tina challenges him to a game of Unders and Overs. He's never played the game before, so Tina explains the rules: "You bet what the total value will be when I roll two dice. Then, I roll the dice and their total determines whether you win...

9 years ago

Factory-trained technicians respond to all our calls. "The service contract...on the whole...applied to upgrades. Need help rewriting malfunctions ect

8 years ago

I have to take out embellishments, misquotations, false benefits and unethical tactics out of these sentences. I need help. Factory-trained technicians respond to all our calls. "The service contract...on the whole...applied to upgrades.

8 years ago

Trained technicians respond to all of our calls. The service contract applied to all upgrades. My previous question could you tell me if this is written right.

8 years ago

What do you mean by accurate? I'm confused. I have been out of school since the 70's. Thank you!

8 years ago

Can someone please help me urgent. I need to rewrite theses two sentences and eliminate unethical aspects. The service contract...on the whole...applied to upgrades. 2. All our costs were within fair-use guidelines. 1. Upgrades were applied to the service...

8 years ago

Why did Buddhism become popular in India? I learned this so long ago idk what the answer is anymore. I cant even remember what I ate for breakfast..

7 years ago

1) what is te message of the monument? 2) why was a particular location chosen for its display? 3) Do you ageee with the chosen location for display? 4) Do you feel that the best way to communicate the message of the piece? 5) Given the tragedy That occur...

6 years ago

Above is a 2nd graph Part 1 Graph Present these results by creating a line graph. Part 2 Analysis 1)What is relationship between the biotic And abiotic factors? 2) how did the construction of a parking lot, hiking trail, and playground affect the fish pop...

6 years ago

I I need so much help. Can anyone explain in detail what is going on? The compound is Potassium Carbonate. What would the flame color of potassium carbonate be? What is the cation after the compound reacts with (NH4)2CO3, and (NH4)2SO4? What is the anion...

6 years ago

Write 1.07 x 10^3 in standard form. 1. 0.00107 2. 10,700 3.107 4. 1,070

6 years ago

In the figure, ab=25, ad=17, dp=8m, AQ= 5 m, bs=3m. Find the area of shaded region

5 years ago

A curling stone is moving at a velocity of 8 m/s stops after sliding 5 m across a surface that has 70 N of friction. What is the stone’s mass?

5 years ago

Mari had 40 tens.write how many hundreds.wtite the number

4 years ago

Rewrite cot^2⁡〖x/4〗 in terms of cosine without power greater than one. Assume that x is in QI.

4 years ago

How do you calculate the uncertainty of vitamin c in an unknown working solution without using the uncertainty eq?

4 years ago

Find the value of the following: a. 5^3𝑥 when 5^𝑥=2 b. 3^5𝑥 when (1/27)^𝑥=4

4 years ago

Dexter has two sticks of length 10 inches and 16 inches. What is the area of the triangle with the longest perimeter that he could form with it such that the third side must have an integral length?

4 years ago

Is it certain that you will get the principle back for every kind of investment?

17 years ago

The Bay of Fundy (or the Fundy Bay) is east of Maine.

16 years ago

To get the x intercept you are going to want to isolate the x so that your problem equals x SO try dividing the 4 in 4x by itself to cancel it out. Since you have to do the same thing on both sides, divide the 4 by 4y and by 12 then you have x=y-3. Here i...

16 years ago

Hey I am mormon so i might be able to answer some of these for you from a mormon perspection if that is what you are asking: Pro or Con-prayer in school: not really touched on no strong church beliefs but there are no problems with this found in the churc...

16 years ago

Thank you!

15 years ago

Thanks. I'm not good with the right hand rules and the websites I'm finding aren't really helping.

14 years ago

broom is to sweep as brush is to _______ ....... i need help with this one someone please answer me:)

14 years ago

thanks

14 years ago

Okay, thank you for your help! I will change the order of my answer.

13 years ago

Okay, I wasn't sure if my answer was right, so thank you!

13 years ago

but wouldn't the mass and the Length of the rod come in play?

13 years ago

Wouldn't the formula be T=2Pisqrt(I/mgd) where you solve for d, but my question iss do I add the two masses or am I over thinking this one

13 years ago

I forgot to mention there were 18 radios counted on Monday

13 years ago

I tried 3x + 2x = 24 5x = 4.8 then multiply 3 • 4.8 = 15.4 and 2 • 4.8 = 9.6 which means 14 tvs & 10 radios would be left

13 years ago

The process of cultural transmission from one generation to another is called:

13 years ago

"All dogs like bones; Sirius is a dog; therefore Sirius likes bones" may commit which fallacy?

12 years ago

Thanks DrBob222!!! You have helped me so much!!

10 years ago

3.54 x 10^7 g TiCl4 x (1 mol/189.68 g) x (1 mol Ti/1 mol TiCl4) x (47.88 g/1 mol) = 8.94 x 10^6 g Ti

10 years ago

Percent yield is equal to the actual amount yield divided by the theoretical amount, so: 7.91 x 10^6 all divided by 8.94 x 10^6 = 88.5% yield Is this right???

10 years ago

I'm doing things on Mastering Chemistry dot com my homework.. I thought i was doing it right.. I was doing 9.9 * (6.02E23/1) It didn't like my significant figures.. It was wanting 6.0 * 10^24 as the answer, not 5.95 ugh... Thanks Dr. Bob.. Will probably b...

10 years ago

the calculator said it.. I didn't do anything but plug it in.. sorry, thanks for help

10 years ago

nevermind, I figured it out!!! I'm getting better!! 3.80* mass of NaCl (58.4) =222g

10 years ago

nevermind, I figured it out... ughhhhh

10 years ago

Ok, I figured it out... First one is 355 * 5.5% = 19.5 g then, 18.5% *2.49 L *1000 (to make mL) = 461 mL then, 42.4/6% = 707 mL Now I've figured those out on my own... I'm stuck on next problem..

10 years ago

Dr. Bob, I just found an old post of someone asking this question, and I figured it out.. 1 mole citric acid reacts with 3 moles sodium bicarbonate, molar mass of NaHCO3 = 84.0 g/mol 1 mole in 1.00 g = 1.00/84.0 = 0.0119 mole sodium bicarbonate this will...

10 years ago

Great! Thanks again! I got it now! I can finish the rest of my lab from these questions... I have 4 cups to do ! lol

10 years ago

Thanks!!!! I'm learning!!

10 years ago

Which length and width are possible dimensions for the garden

9 years ago

New landforms silly

9 years ago

the link ms sue gave is actually helpful.

8 years ago

anyway, thanks for the help ms sue!

8 years ago

All calls are answered by trained technicians.

8 years ago

lol i think ur in my class btw that isnt 28% of our grade he was lying tests cost us 50% of our grade lol

7 years ago

No wonder you seemed to get all my answers right...

7 years ago

Mrs. Sue, is doing this your job?

7 years ago

I'd love to help, just two problems. "what do you need help with?" whatever it is please post and we'll try to help you. And we didn't need to know the reason you needed the answer. in the future, if you want anything I suggest you not telling people why...

7 years ago

Thanks Jazzzmin it really helped

7 years ago

Thanks Jai

7 years ago

I know the answer for the rest, but I need the answer for What is Fritz Keonig monument message?

6 years ago

Please answer me

6 years ago

他汉口又

6 years ago

Directions to the City of Springfield has built a public park around beautiful Cypress Pond. The city has hired you as its lead environmental scientist. Your job is to monitor the impact the new park has on the. Biodiversity of cypress pond. You will need...

6 years ago

1) Yes this is random sample, but idk know what to write as a explanation. 2) I think is a fair question, but idk what to write for the explaination.

6 years ago

Thank you @Mrs.Sue

6 years ago

Very wrong please make a video

5 years ago

THANK YOU i hope you like my music

5 years ago

and with the concentration

4 years ago

Eighty millon, fourty thousand, nine hundred, sixty

3 years ago

What multiplication fact can you double to find 4×7

2 years ago

Hi chealise I love kpop too and that all my favorite kpopn

2 years ago