Questions and answers by

Mandy

Questions (319)

Calculate the enthalpy for the following reaction: 4 NH3 (g) + 5 O2 (g) into 4 NO (g) + 6 H2O (g).You may only use the following
1. 2 answers
2. 3,511 views
Calculate the enthalpy change in kilojoules when 54.7g of MgCO3 decomposes according to the following equation:MgCO3 (s) into
1. 1 answer
2. 1,957 views
Trains A and B are traveling in the same direction on parrallel tracks. Train A is traveling at 60 mph, and train B is traveling
1. 0 answers
2. 708 views
Trains A and B are traveling in the same direction on parrallel tracks. Train A is traveling at 60 mph, and train B is traveling
1. 2 answers
2. 987 views
Trains A and B are traveling in the same direction on parrallel tracks. Train A is traveling at 60 mph, and train B is traveling
1. 0 answers
2. 597 views
How do you figure out the molecular weight?
1. 1 answer
2. 419 views
Evaluate - |– 618|the brackets indicate an absolute, so the answer is 618, but the negative before the brackets makes it
1. 1 answer
2. 462 views
A solution contains the following:NH3(aq) + H2O(l) <--> NH4+(aq) + OH-(aq) Adding NH4Cl to this solution shifts the equilibrium
1. 1 answer
2. 1,420 views
A total of 30.6 g of potassium hydrogen phthalate is needed to completely neutralize a 500.0 mL solution of sodium hydroxide.
1. 0 answers
2. 638 views
G. William Domhoff's view of the power structure of the United States most closely resembles the analysis of which sociological
1. 3 answers
2. 640 views
2NOCl--->2NO + Cl2Time(s) [NOCL)(M) 0 0.200 575 0.158 995 0.137 2080 0.102 a) Calculate the rate constant, k, and include units.
1. 2 answers
2. 545 views
The following general reaction was found to be first-order with respect to A and second-order with respect to B:A + B --->
1. 1 answer
2. 569 views
Eugenol, the active ingredient in cloves, has a formula of C10H12O2. What is the boiling point of a solution containing 1.14g of
1. 1 answer
2. 2,578 views
Acetone, C3H6O, is the main ingredient of nail polish remover. A solution is made up by adding 35.0mL of acetone(d=0.790g/mL) to
1. 1 answer
2. 958 views
Acetone, C3H6O, is the main ingredient of nail polish remover. A solution is made up by adding 35.0mL of acetone(d=0.790g/mL) to
1. 4 answers
2. 3,731 views
Eugenol, the active ingredient in cloves, has a formula of C10H12O2. What is the boiling point of a solution containing 1.14g of
1. 1 answer
2. 910 views
A syringe with a movable piston, contains 0.057g of carbon dioxide gas at 23.5C. If the pressure in the syringe was 953mmHg,
1. 1 answer
2. 687 views
Acetone, C3H6O, is the main ingredient of nail polish remover. A solution is made up by adding 35.0mL of acetone(d=0.790g/mL) to
1. 1 answer
2. 991 views
Measuring coefficients of friction. A coin is placed near one edge of a book lying on a table, and that edge of the book is
1. 0 answers
2. 1,211 views
Write formulas for dinitrogen tetroxide, phosphate ion, and ammonium sulfate. Please Help! I don't know where to start!
1. 1 answer
2. 484 views
Could you please review for me. Thank youThe past has a hold on me in many ways. Thinking back on my childhood, I have made
1. 4 answers
2. 638 views
Calculate the pH of each of the following solutions:a) .35 M hydrochloric acid, HCl b) .35 M acetic acid, HC2H3O2 c) .35 M
1. 3 answers
2. 3,597 views
Wwrite a balanced equation for the following chemical processes: the reaction between NaOH an dsalicyclic acid; the reaction
1. 1 answer
2. 507 views
Hi I need help doing this question! Thank you in advance!Suppose that a mixture contains 1,4-dimethoxybenzene and benzoic acid.
1. 0 answers
2. 566 views
how would you write it with the capitalization ( aunt consuelo is consuelo melendez, doctor of dental surgery )
1. 1 answer
2. 635 views
we listened to that old song again,"you and me against the world." (We, You, And, Me, Against, The, World )
1. 5 answers
2. 1,884 views
aunt consuelo is consuelo melendez, doctor of dental surgery. ( Aunt, Consuelo, Consuelo, Melendez, Doctor, Dental, Surgery )
1. 4 answers
2. 1,735 views
new year's day occurs on january 1. ( New, Year's, Day, January )
1. 2 answers
2. 408 views
the henderson family moved to chicago from the east coast. ( The, Henderson, Chicago, East, Coast )
1. 1 answer
2. 1,385 views
my mother always uses tide laundry detergent. ( My, Tide )
1. 1 answer
2. 666 views
her father is reverend harry anderson. (Her, Reverend, Harry, Anderson )
1. 1 answer
2. 633 views
john grisham is the author of, "the street lawyer." ( John, Grisham, Author, The )
1. 4 answers
2. 599 views
which words need to be capitalized? my neighbors across the street have a new car, it's a toyota. ( My, Toyota )
1. 2 answers
2. 740 views
which words need to be capitalized? st.patrick's day is on march 17 every year. (St. Patrick's, Day, March )
1. 1 answer
2. 991 views
which words that need to be capitalized ? mrs.sally johnson lives in dallas, texas. ( Mrs., Sally, Johnson, Dallas, Texas )
1. 1 answer
2. 504 views
1)Mr.Sally Johnson lives in Dallas, texas. 2)St.Patrick's Day is on march 17 every year 3)My neighbors across the strreet have a
1. 3 answers
2. 600 views
check my spelling : gliding, hungrier, believe, receipt, noticeable, poisonous, postdate, neighbors, cities, knives.
1. 1 answer
2. 375 views
My garden is full of water, because of yesterday's rain. correct punctuation
1. 1 answer
2. 502 views
She said your invited to the party and youre brother too. incorrect punctuation right
1. 2 answers
2. 416 views
Their car is the blue Toyota in the front row of the parking lots. correct punctuation
1. 3 answers
2. 477 views
"This will not be endured!"he roared. correct punctuation
1. 1 answer
2. 784 views
Did you see that car accident?! correct punctuation
1. 1 answer
2. 508 views
We're going to dance. correct punctuation
1. 2 answers
2. 993 views
Parents want their children to go to college; however, they do not always have the funds to send them. correct punctuation
1. 1 answer
2. 711 views
What are some tips for using correct punctuation in writing?
1. 0 answers
2. 199 views
My little sister is a big baby; she cries all the time. correct punctuation
1. 2 answers
2. 1,534 views
Sally wants a new bicycle, but her mother and father will not buy her one. correct punctuation
1. 2 answers
2. 1,705 views
my garden is full of water,because of yesterday's rain . correct punctuation
1. 2 answers
2. 2,321 views
Calculate how much energy will be released when 11.11g of calcium chloride are dissolved in 100ml of solution
1. 3 answers
2. 552 views
What fermentation products are made by both yeast and humans?Which product of fermentation is made by both humans and yeast? a.
1. 0 answers
2. 913 views
What is one standardized variable for the following experiment?Ten different African violet varieties were monitored to
1. 2 answers
2. 687 views
A girls soccer league computes a team's points by averaging 5 points for a win, 2 points for a tie and 1 for a loss. If the
1. 1 answer
2. 464 views
How many of the 250 perch netted by a fisherman would you expect to have a mass more than 400g if the mass of the perch are
1. 1 answer
2. 604 views
During an emergency room examination for an injured arm, the physician palpates thearm’s entire length, starting at the
1. 1 answer
2. 470 views
The most serious type of allergic reaction isA. atrial fibrillation. C. anaphylaxis. B. psoriasis. D. lupus. I think it is (c)
1. 2 answers
2. 395 views
Would you please proof read and give any suggestions on making this a polished piece?For the past three months work-related
1. 4 answers
2. 649 views
Hi,We did an experiment in lab and our professor asked us why we used acetic acid as our oxidizing agent NaOCl + CH3COOH -->
1. 3 answers
2. 1,110 views
would you say darwinism is the most believed out of all the evolutionary theories?
1. 1 answer
2. 360 views
A ladder rests inclined against a wall. Are you safer on the ladder when the floor is frictionless but the wall is rough or when
1. 2 answers
2. 1,364 views
Why can't you put your heels firmly against a wall and then bend over without falling?
1. 2 answers
2. 597 views
What is the total area in square miles and square kilometers of Shubra al Khaymah, Egypt
1. 1 answer
2. 393 views
I know that basic clothes are an inelastic item (need) but I cannot find the words to explain why. Any suggestions?---Maybe as a
1. 1 answer
2. 427 views
A boat takes 2.70 hours to travel 40.0 km down a river, then 5.90 hours to return. How fast is the river flowing?
1. 0 answers
2. 895 views
Convolutes:Simple asbumpy:smooth or easy:difficult
1. 1 answer
2. 420 views
How is the Internet a promoter of free enterprise? I came up with pop-ups but I can't think of another example.
1. 1 answer
2. 503 views
How can the Internet be considered a product?
1. 1 answer
2. 396 views
How can the Internet be considered a product and a promoter of free enterprise (besides pop-ups)?
1. 1 answer
2. 667 views
How can temperature influence antibody-antigen response?Would an increase quicken the response and a decrease in temp slow the
1. 1 answer
2. 537 views
How can temperature influence antibody-antigen response?
1. 1 answer
2. 472 views
Can anyone help and check my answers?A. 8.43 cm to millimeters--- 84.3 millimeters. B. 2.41x10^2 cm to meterss--- 0.0241 meters.
1. 7 answers
2. 3,864 views
A student performed an anaysis of a samply for its calcium content and got the following results :14.92% , 14.91%, 14.88% ,
1. 3 answers
2. 1,314 views
How might higher levels of development of a country be related to temperate locations??
1. 1 answer
2. 416 views
b)The water line is given by the equationy=-2/3x-12 Suppose you want to put a pink flamingo lawn ornament in your backyard, but
1. 1 answer
2. 1,237 views
im not sure how to find the first four terms of each arithmetic sequencetn=4+(n-1)(3) helpp me pleasee!
1. 2 answers
2. 672 views
im not sure how to find the first four terms of each arithmetic sequencetn=4+(n-1)(3) helpp me pleasee!
1. 1 answer
2. 435 views
I need help please."what voluma [in mL] at STp will be occupied by 0.0035 mol of methane [CH4]" THANK YOU SOO MUCH!
1. 2 answers
2. 1,134 views
im a little confuse on this problem."in the production of copper from ore containing copper(II) sulfide, the ore is first
1. 0 answers
2. 540 views
im a little confuse on this problem."in the production of copper from ore containing copper(II) sulfide, the ore is first
1. 0 answers
2. 564 views
im a little confuse on this problem."in the production of copper from ore containing copper(II) sulfide, the ore is first
1. 1 answer
2. 734 views
im a little confuse on this problem."in the production of copper from ore containing copper(II) sulfide, the ore is first
1. 0 answers
2. 569 views
im a little confuse on this problem."in the production of copper from ore containing copper(II) sulfide, the ore is first
1. 1 answer
2. 589 views
im a little confuse on this problem."in the production of copper from ore containing copper(II) sulfide, the ore is first
1. 0 answers
2. 629 views
im a little confuse on this problem."in the production of copper from ore containing copper(II) sulfide, the ore is first
1. 0 answers
2. 554 views
im a little confuse on this problem."in the production of copper from ore containing copper(II) sulfide, the ore is first
1. 0 answers
2. 532 views
im a little confuse on this problem."in the production of copper from ore containing copper(II) sulfide, the ore is first
1. 0 answers
2. 524 views
im a little confuse on this problem."in the production of copper from ore containing copper(II) sulfide, the ore is first
1. 0 answers
2. 513 views
im a little confuse on this problem."in the production of copper from ore containing copper(II) sulfide, the ore is first
1. 0 answers
2. 546 views
im a little confuse on this problem."in the production of copper from ore containing copper(II) sulfide, the ore is first
1. 0 answers
2. 475 views
im a little confuse on this problem."in the production of copper from ore containing copper(II) sulfide, the ore is first
1. 0 answers
2. 551 views
im a little confuse on this problem."in the production of copper from ore containing copper(II) sulfide, the ore is first
1. 0 answers
2. 555 views
im a little confuse on this problem."in the production of copper from ore containing copper(II) sulfide, the ore is first
1. 0 answers
2. 533 views
im a little confuse on this problem."in the production of copper from ore containing copper(II) sulfide, the ore is first
1. 0 answers
2. 546 views
im a little confuse on this problem."in the production of copper from ore containing copper(II) sulfide, the ore is first
1. 0 answers
2. 568 views
What would be the inverse of:f(x)= 6/x Is it the same?
1. 1 answer
2. 442 views
How did America participate in the Cold War?
1. 1 answer
2. 433 views
Was Nixon the future U.S. president that played a major role in HUAC invesitagions and hearings?
1. 1 answer
2. 581 views
Suppose the series An (from n=1 to INF) is known to be convergent. Prove that series 1/(An) (from n=1 to INF) is a divergent
1. 1 answer
2. 567 views
Hello. I need help finding the open intervals of this equation:f(x)=3x^2-12 I already took the derivative of it by using the
1. 1 answer
2. 520 views
Hello. I need help finding the open intervals of this equation:f(x)=3x^2-12 I already took the derivative of it by using the
1. 1 answer
2. 521 views
how do you solve linear combinations?
1. 1 answer
2. 509 views