# raul

Most popular questions and responses by raul
1. ## Chemistry

A 0.464 gram sample of a metal, M, reacts completely with sulfuric acid according to: M(s) +H2SO4(aq)=MSO4(aq)+H2(g) A volume of 211 mL of hydrogen is collected over water; the water level in the collecting vessel is the same as the outside level.

2. ## science

1. Identify the phase or phases of matter (solids, liquids, and gases) that apply to each statement. More than one phase of matter may apply to each statement. a. Molecules do not move around, but vibrate in place b. Has volume but no particular shape c.

3. ## Chemistry

A 250 g sample of water with an initial temperature of 98.8 c loses 7,500 joules of heat. What is the final temperature of the water ?

4. ## Chemistry

2M +6HCl–>2MCl+3H2 Delta H= -638.0 Kj HClg—>HCl aq= Delta H -74.8 Kj H2+Cl2–>2HCl Delta H -1845.0 Kj MCl3s–> MCl3 aq Delta H -249.0 Kj Use the information above to determine the enthalpy of the following reaction. 2M +3Cl2–>2MCl3 Delta H =???

5. ## history

what do you think contributed to the jump in productivity among american workers during world war 2?

6. ## Calculus

The position of a particle moving on a horizontal line is given by s(t)=2t^3-15t^2+24t-5, where s is measured in feet and t in seconds. a: What is the initial position of the particle? b: What is the average velocity of the particle on the interval

7. ## Chemistry

One reaction of iron with hydrochloric acid is represented by the following thermochemical equation. Fe(s) + 2HCl(aq) ? FeCl2(aq) + H2(g); (Delta)H°= –87.9 kJ How much heat is liberated at constant pressure if 0.215 g of iron reacts with 40.4 mL of

8. ## history

what conditions were present in the united states after world war 1?

9. ## geometry

Shalonda notices that when she stands next to the flagpole, she casts a shadow that is 8 feet long and that the flagpole casts a shadow that is 28 feet long. Little Shalonda is 4 feet tall. How tall, to the nearest foot, is the flagpole?

10. ## Thermodynamics and Heat Transfer

A steam pipe is 75 mm external diameter and is 80 m long. It conveys steam at a rate of 1000 kg/h at a pressure of 2 Mpa. The steam enters the pipe with a dryness fraction of 0.98 and is to leave the pipe with a dryness of not less than 0.96. The pipe must

11. ## science

A boat of mass 40 kg is at rest; A dog of mass 4 kg moves in the boat with a velocity of 10 m/s. what is the velocity of boat? a) 4 m/s b) 2 m/s c) 8 m/s d) 1 m/s

12. ## chemistry

How many grams of oxygen are collected in a reaction where 245 mL of oxygen gas is collected over water at a temperature of 25 ^\circ {\rm C} and a total pressure of 688 torr

13. ## physics

A current I = 16 A is directed along the positive x-axis and perpendicular to a magnetic field. A magnetic force per unit length of 0.15 N/m acts on the conductor in the negative y-direction. Calculate the magnitude and direction of the magnetic field in

14. ## history

why did the national debt rise so quickly during world war 2?

15. ## Chemistry

At constant volume the heat of combustion of a particular compound is -3378.0 kj/mol.When 1.563 g of this compound ( molar mass of 126.88 g/mol )was burned temp rose 6.991 C. What's the heat capacity of the calorimeter(calorimeter is constant)?

16. ## history

how did the navajo code-talkers aid marines in battle?

17. ## Maths

solve the equation: 4cos2*theta + 3cos*theta + 3 = 0 for values between 0 and 180 degrees If that is cosine squared in the first term, you have a quadratic equation. Normally cosine squared would be written in ASCII as cos^2 Theta.

18. ## science

Solar energy is mainly caused due to a) Burning of hydrogen in the oxygen b) Fission of uranium present in the sun c) Fusion of protons during synthesis of heavier elements d) Gravitational contraction

19. ## science

The most malleable metal is a) Sodium b) Lead c) Steel d) Gold

20. ## science

Silvering of mirror is done by a) AgNO3 b) Ag2O3 c) Fe2O3 d) Al2O3

21. ## chemistry

what minimum mass of copper ii nitrate must be added to 70 ml of a .0594 M phosphate solution in order to completely precipitate all the phosphate as solid copper ii phosphate. 2PO4^-3+3Cu(NO3)2-->Cu3(PO4)2+6NO3^-1 I can not come up with the correct answer

22. ## Math

Describe in your own words how to solve a linear equation or inequality

23. ## Math

Write two different numbers that when rounded to the nearest tenth will give you 18.3

A parking lot near the sports field holds a total of 52 vehicles. There are 42 cars parked there now. Half of these cars are red, 10 are blue, and the rest are silver. What fraction of the cars are silver?

25. ## science

Hydraulic press is based on a) Archimedes principled b) Bernoulli’s solution c) Pascal/s law d) Reynold’s law

26. ## science

4.4 g of CO2 contains how many liters of CO2 at STP ? a) 2.4 litre b) 2.24 litre c) 44 Litre d) 22.4 litre

Renee has a research paper due in three days. She has set aside two hours to complete this task. What is wrong with this study goal? A. It is not significant and can’t be rewarded. B. The goal is not concrete and specific. C. The time she has allotted is

28. ## history

who was the republican candidate who won the election of 1920?

29. ## Intermediate Algebra

Hi another question I have please. Find the midpoint of F A B? A(6,10) B(-20,14)

30. ## algebra

what does x equal in the equation 3x-35=9x-59

31. ## philosophy

write a 350-700 word response describing how Socrates’, Plato’s, and Aristotle’s philosophies relate to each other

32. ## Math

Surface area of each solid .round to THE nearest tenth if necesaria. 6cm 5.2cm 7cm 6c

33. ## math fractions

Rogelio has 3 one-dollar bills, 5 quarters, 4 dimes, 2 nickels, and 9 pennies. What fraction of the coins are quarters?

34. ## science

The heaviest naturally occurring element is a) Uranium b) Iron c) Silica d) Aluminum

35. ## algebra 2

solve each system by substitution 1. y=xt1 2x+y=7 2. x=y-2 3x-y=6 3. y=2xt3 5x-y=-3

39. ## Chemistry

which is more concentrated a 1 liter solution containing 30 g of NaCl or a 1 liter solution containing 30g of KCl

40. ## science

the length of the string is 9.984cm.What is the length of the string to the nearest tenth of a centimeter

41. ## algebra

how do i graph this quadratic funtion y=x(squared) + 4x - 4

42. ## Computers

What are the particular hardware elements that have a direct memory access device?

Justin took photographs during a trip to the mountains. He used one roll of color film and one roll of black-and-white film. He took 1/3 of the pictures in color during a picnic with his family. If he took 36 pictures in all, how many color pictures did he

A pile of index cards has a mixture of white, pink, yellow, red, and blue cards. Some cards are lined, and some are unlined. The total number of cards is 150. 2/5 of the cards are blue, 10 cards are white, and 10 cards are red. Half of the remaining cards

45. ## MAth

Two thirds of the musicians in a 16-piece band are girls. the 16 musicians include 12 brass players. what fraction of the band plays brass instrument?

Two thirds of the musicians in a 16-piece band are girls. the 16 musicians include 12 brass players. what fraction of the band plays brass instrument?

47. ## Math

Familling new carpet and wants to know how much carpert they need , but they olso know that carpet is sold by the square yard. 23feetx9feetx6feet x 3feetx10 feetx19feet

48. ## Calculus

At what value of x does the graph of y=9x^(1/3)+x^2 have a point of inflection?

49. ## history

1.who was the commander of the u.s. navy in the pacific? 2.where did the japanese strike after pearl harbor?

50. ## science

how much work was accomplished by the fall?

51. ## algebra 2

solve each system by substitution 1. 6x-3y=-33 2xty=-1 2. 2x-y=7 3x-2y=10 3. 4x=8y 2x+5y=27

52. ## us government

how is compromise and majority rule a part of congressional politics?

53. ## complete subject and complete predicate

this gold ring once belonged to my grandmother

54. ## Us History

The Lousiana Purchase removed a major point of contention between the United States and a European power but left many others. Which areas of possible conflict remained, and what were the sources of these potential conflicts?

55. ## I donth Get it !...US History

Did the differing circumstances of Maryland and Virginia's founding affect the course of their respective development? If so, how?

56. ## Us History

What problems dogged the early settlements of the Chesapeake region?

57. ## hystory

Why did Europeans press westward during this period, instead of concentrating in the more easily defended coastal towns?

1. ## math

I need help please I just got homework and I don't understand are all my problems 7/10 2/5 2/3 3/9 8/22 1/2 16/24 12/29 15/45 I have more but I think its a waste of time for you

posted on February 21, 2019
2. ## Help SS!

Thank you

posted on December 19, 2018
3. ## vocabulary

dull

posted on April 28, 2018
4. ## vocabulary

Cruel

posted on April 28, 2018
5. ## Finance

543.98

posted on October 9, 2017
6. ## Geometry

65.3

posted on September 3, 2017
7. ## science

don't know

posted on November 14, 2016
8. ## Political Science

yes

posted on June 9, 2016
9. ## FINANCE

Q1. FV= (1000*.09)+1000= 1090, PV= -1000, n=6, pmt= 140. Cpt I/y= 15.027%. They should be happy because they were making a less (14%) than the 15.027%. Q3. The current yeild is $80 (the coupon) divided by$901.40 (The current market value). Sorry my

posted on April 30, 2016
10. ## Finance

fv= (1000*.09)+1000= 1090, PV=-1000, n=6, pmt= 140 cpt i/y= 15.027%

posted on April 30, 2016
11. ## Chemistry

The following system is at equilibrium: A(s)+4B(g)⇌C(g) Classify each of the following actions by whether it causes a leftward shift, a rightward shift, or no shift in the direction of the net reaction. (Add more A)(Remove some A)(Double the

posted on April 21, 2016
12. ## physics

Polarized light is incident on a sheet of polarizing material and only 22% of the light gets through. Find the angle between the electric field and the transmission axis

posted on April 4, 2016
13. ## science

I also go to connexus

posted on February 16, 2016

Me TOO.

posted on February 8, 2016
15. ## Maths

20,00 will be the answer to the question

posted on November 11, 2015
16. ## social studys

i think is 3

posted on October 2, 2015
17. ## Math

Oh I'm stupid, I actual answer is the hundredths is divided into 2000 peices, and then you take something and another something, put those poopies together and boomshakalaka!

posted on September 16, 2015

24r1

posted on May 14, 2015
19. ## algebra (check my answers?)

looks good

posted on February 27, 2015

36 / 1.3 =27.69(round up) 28 color pictures

posted on February 27, 2015

11/42

posted on February 27, 2015
22. ## math

8 x .50 =4 + 8= $12 12 x .20 =2.4 -12=$9.60 9.60 x .15 = 1.44 + 9.60= $11.04 11.04 x .60 = 6.62 -11.04=$4.42 final price.

posted on February 27, 2015
23. ## math

You have to multiply the 20 min by the number of student in the class which are 25. Then take the minutes and devide them by the number of minutes in an hour. 20 x 25 = 500 minutes 500/60 = 8.3333 (round down) 8 hrs

posted on February 27, 2015

Thank you Reed and Nour

posted on February 27, 2015

:) lol. Thanks again

posted on February 27, 2015
26. ## Accounting

$273.49 x .35= 95.7215 273.49 + 95.7215=$369.21

posted on February 27, 2015
27. ## Accounting

$5.12 plus 55%=$7.94 price per square yard.(rounded up) 5.12 x .55= 2.816 2.816 + 5.12= 7.94

posted on February 26, 2015

I mean the 2/3 of the musicians are girls.

posted on February 26, 2015

Steve, Thank you. THat is part of the question that is not needed to solve the problem.

posted on February 26, 2015
30. ## English

is this correct parallel sentence: When the movie Star Wars premiered in 1977, it was both surprising and revolution in its special effects.

posted on January 29, 2015
31. ## Math

Sorry for 2 messages. I accidently hit the send button while i was typing!XD

posted on September 23, 2014
32. ## Math

the hundredths grid is divided into 100 pieces. Now, you shade a whole grid completely. Then , you shade in 65 pieces of another grid to show 1.65. Then, show another grid with 98 pieces shaded in. Don't forget to put in the subtraction sign!! And now your

posted on September 23, 2014
33. ## Math

the hundredths grid is divided into 100 pieces. Now, you shade a whole grid completely. Then , you shade in 65 pieces of another grid to show 1.65.

posted on September 23, 2014
34. ## math prob.

Why is 72 on monday

posted on December 9, 2013
35. ## geometry

im still not sure on how to do this

posted on May 8, 2013
36. ## geometry

Shalonda notices that when she stands next to the flagpole, she casts a shadow that is 8 feet long and that the flagpole casts a shadow that is 28 feet long. Little Shalonda is 4 feet tall. How tall, to the nearest foot, is the flagpole?

posted on May 8, 2013
37. ## Accounting

\$24000

posted on April 27, 2013
38. ## Chemistry

kj/C not cal/g that's another question I'm working on

posted on March 22, 2013
39. ## Chemistry

At constant volume the heat of combustion of a particular compound is -3378.0 kj/mol.When 1.563 g of this compound ( molar mass of 126.88 g/mol )was burned temp rose 6.991 C. What's the heat capacity of the calorimeter(calorimeter is constant)? Sorry the

posted on March 22, 2013
40. ## chemistry

13.5 mols C X(1 m C3H8/ 3m C)=4.5 m c3h8 4.5 miles c3h8 x 11 atoms in c3h8= 49.5 moles of atoms

posted on March 1, 2013