Sanaya

Most popular questions and responses by Sanaya
1. Probability #3

Please check my answers. Thank you! The game of American roulette involves spinning a wheel with 38 slots: 18 red, 18 black, and 2 green. A ball is spun onto the wheel and will eventually land in a slot, where each slot has an equal chance of capturing the

2. Math

Another card game. In a new card game, you start with a well-shuffed full deck and draw 3 cards without replacement. If you draw 3 hearts, you win \$50. If you draw 3 black cards, you win \$25. For any other draws, you win nothing. (a) Create a probability

3. Probability #2

Baggage fees. An airline charges the following baggage fees: \$25 for the rst bag and \$35 for the second. Suppose 54% of passengers have no checked luggage, 34% have one piece of checked luggage and 12% have two pieces. We suppose a negligible portion of

4. Chemistry-Dr.Bob

An unknown piece of metal weighing 100. g is heated to 90.0 degrees Celcius. It is dropped into 250 g of water at 20.0 degrees Celcius. When equilibrium is reached, the temperature of both the water and piece of metal is 29.0 degrees Celcius. Determine the

5. Chemistry-Dr.Bob, I need you!!!!

You can mix 100.mL of 1.0 M HCl with 100 mL of 1.0 NaOH, both at 25 degree Celcius. The temperature of your calorimeter rises by 5.98 degree C, and its heat capacity is 100 J/degre C. How much energy is released per mol of H2O formed? My answer: 6x10^6 J

6. Math

Baggage fees. An airline charges the following baggage fees: \$25 for the rst bag and \$35 for the second. Suppose 54% of passengers have no checked luggage, 34% have one piece of checked luggage and 12% have two pieces. We suppose a negligible portion of

7. Chemistry

I am stuck on b)... Reacting 1 L of H2(g) with 1 L C2H2(g) (both at STP) results in the formation of 1 L of C2H4(g) if the reaction is maintained at the same conditions (STP) and goes to completion. If this reaction produced 6.3 kJ of heat (absorbed by the

8. Chemistry-Dr.Bob

A solution is prepared by mixing 50.0mL of 0.001 M HCl and 10.0 mL of 0.200 M NaCl. What is the molarity of chloride ions in this solution? My work: (0.001 mol/L)((0.05 L)= 0.005 mol HCl (0.200 mol/L)(0.01 L)= 0.002 mol NaCl 0.005+0.002=0.007 mol of

9. math

A roll of fabric was 144 inches long. A customer bought 2 feet of the fabric. How many feet of fabric were remaining?

10. Chemistry- Dr.Bob

Why is cis-PCl3F2 polar and trans-PCl3F2 nonpolar?

11. math

A roll of fabric was 132 inches long. A customer bought 3 feet of the fabric. How many feet of fabric were remaining?

12. Statistics

Find the interquartile range given these data points: 57,66,69,71,72,73,74,77,78,7879,79,81,81,82,83,83,88,89,94. When I used the TI-84 calculator, I got ... Q1=72.5 Q3=82.5 IQR=Q3-Q1=82.5-72.5=10 But.. When I created a stem and leaf plot I found that Q2=

13. Probabiliy

Another card game. In a new card game, you start with a well-shuffed full deck and draw 3 cards without replacement. If you draw 3 hearts, you win \$50. If you draw 3 black cards, you win \$25. For any other draws, you win nothing. (a) Create a probability

14. Probability #1

Please check my answers. Thank you! Another card game. In a new card game, you start with a well-shuffed full deck and draw 3 cards without replacement. If you draw 3 hearts, you win \$50. If you draw 3 black cards, you win \$25. For any other draws, you win

15. Chemistry-Dr.Bob

Since most chemical reactions are conducted in containers open to the armisphere, why is the energy transfer associated with a chemical reaction generally expressed as the change in enthalpy? Is it because the enthalpy of reaction measures the change in

16. Chemistry-Dr.Bob

You can mix 100.mL of 1.0 M HCl with 100 mL of 1.0 NaOH, both at 25 degree Celcius. The temperature of your calorimeter rises by 5.98 degree C, and its heat capacity is 100 J/degre C. How much energy is released per mol of H2O formed? My answer: 6x10^6 J

17. Chemistry

Please check. HCl: dipole-dipole interaction HF: hydrogen bonding TiCl4: ionic bonding? CsCl:ionic bonding

18. Statistics

Find the interquartile range given these data points: 57,66,69,71,72,73,74,77,78,7879,79,81,81,82,83,83,88,89,94. When I used the TI-84 calculator, I got ... Q1=72.5 Q3=82.5 IQR=Q3-Q1=82.5-72.5=10 But.... When I created a stem and leaf plot I found that

19. Chemistry

Calculate the average kinetic energy of 1 mol of hydrogen molecules and of 1 mol of sulfur hexafluoride molecules at 25 degrees Celsius.

20. Chemistry-Dr.Bob

You are at your cabin in the woods. Will you be able to take a hot bath tonight if only 0.1 lb of propane remains in the tank? Explain. My answer: No, I will not be able to take a hot bath. By making assumptions and approximations, I got... energy released

21. Chemistry

Name the compound or give molecular formula. 1. Pt(NO2)2 : ? Is it Platinum (II) Nitrite 2. Manganese (II) bromide pentahydrate:? Is it MnBr2 • 5H2O

22. Calculus

Compute the surface area of revolution about the x-axis over the interval. y = x^2, [0, 4] Is it (pi/12)(65^2 - 65)^(3/2)?

23. math

Jenelle has a blue jug and a red jug, both containing water. The blue jug has 4 gallons and 1 quart of water in it, and the red jug has 2 gallons and 2 quarts of water in it. How much water is in both jugs?

24. Chemistry

Combusting 44.8L of H2 with 22.4 L O2 (both at STP) results in the formation of 44.8 L of H2O if the reaction is maintained at the same conditions (STP) and goes to completion. Given the heat of formation of water (= -241.8 kK/mol) calculate a) the PV work

25. Chemistry-Dr. Bob

Reacting 1 L of H2(g) with 1 L C2H2(g) (both at STP) results in the formation of 1 L of C2H4(g) if the reaction is maintained at the same conditions (STP) and goes to completion. If this reaction produced 6.3 kJ of heat (absorbed by the surroundings),

26. Chemistry- Dr.Bob

1. Oxygen (O2) is about 20% of our air, with about 80% nitrogen and a bunch of minor components. In Colorado Springs, where I grew up, the elevation is ~ 6500 feet and atmospheric pressure is only around 12 psi (vs. 14.7 psi at sea level). Under those

27. Chemistry- Dr.Bob!

1. Oxygen (O2) is about 20% of our air, with about 80% nitrogen and a bunch of minor components. In Colorado Springs, where I grew up, the elevation is ~ 6500 feet and atmospheric pressure is only around 12 psi (vs. 14.7 psi at sea level). Under those

28. Chemistry

Calculate the frequency of light associated with the emission from n=5 to n=4 in the hydrogen atom. I got -7.41 x10^13 Hz, but the answer would make sense if it is positive... So does this mean that when the electrons jump from n=5 to n=4, energy is

29. Calculus

Evaluate using long division. The integral of x/6x-5 dx How do I divide this?

30. Chemistry -Dr. Bob

Reacting 1 L of H2(g) with 1 L C2H2(g) (both at STP) results in the formation of 1 L of C2H4(g) if the reaction is maintained at the same conditions (STP) and goes to completion. If this reaction produced 6.3 kJ of heat (absorbed by the surroundings),

31. Chemistry

Why is the pressure of a gas does not depend on the molar mass of the gas?

32. Chemistry

Can pi bonds be made from d-orbitals?

33. math

Holly ordered 2 pounds and 9 ounces of roast beef and 3 pounds and 9 ounces of ham. How much meat did Holly order?

34. Chemistry-Dr.Bob

Why is gasoline (octane) better than diesal (cetane)?

35. Chemistry

Compute the surface area of revolution about the x-axis over the interval. y = x^2, [0, 4] Is it (pi/12)(65^2 - 65)^(3/2)?

36. Chemistry-Dr.Bob

What is the increasing dipole moment for CO,CS, and SiS? My answer: SiS

37. Calculus

How do I integrate sqrt of (1+e^(2x)) if doing u-sub.. u=sqrt of (1+e^(2x)) and ten using partial fraction...?

38. Chemistry

Can pi bonds be made from d-orbitals?

39. Grammar

Is it correct to say.. "This chicken tastes fabulous." Is the word "fabulous" used correctly in this context?

40. Calculus

How do you integrate (x-r)^2 (1/r) (e^(-x/r)) from the interval negative infinity to positive infinity?

41. Calculus

Integrate e^(-t/r) WITH RESPECT TO dt?

42. Calculus

How do you integrate e^(-t/r) dt?

43. Calculus

How do you integrate e^(-t/r)?

44. Calculus

Integrate x/(6x-5) dx The answer is 1/6 x + 5/36 ln abs (36x-30) + C... But I don't understand why it is 5/36 times ln.. I thought that when you factored out the 5 you would get 5 times ln abs (36x-30)..

45. Calculus

Calculate integral [0, infinity) xe^(-x) dx

46. Calculus

Integral sign 8x/(x-1) dx Is it 8x+8ln abs (x-1)+C ?

47. Calculus

Evaluate the integral. Problem#1 Integral sign 4dx/[(x+3)(x^2 +3x) Does it matter where A, B, and C is placed over. Is there a particular order? Is it ..... (A/x)+(B/(x+3))+(c/(x+3)^2=4 Or ... (A/x+3)+(B/x)+(C/(x+3)^2)=4 I am confused because I get

48. math

Each side of the shaded square is 1 unit. What is the length, width, and area of the figure?

49. math

The perimeter of a rectangle is 38 centimeters. The length is 7.5 centimeters. What is the width?

50. math

The area of a rectangle is 45 square inches. One dimension is 5 inches. What is the perimeter?

51. math

Holly ordered 3 pounds and 11 ounces of roast beef and 4 pounds and 10 ounces of ham. How much meat did Holly order?

52. math

Jennie and Millie are sister gorillas. Jennie is 57 kilograms and 663 grams,and Millie is 113 kilograms and 181 grams. How much do the sister gorillas weigh together?

53. math

Levi worked in his neighbor's yard for 7 hours trimming the trees. After trimming, he bagged up the trimmings in 38 minutes. How many minutes did he work in the yard altogether?

54. math

A sack of sand measures 21 kilograms and 714 grams,and a sack of yard clippings measures 7 kilograms and 192 grams. How much more does the sack of sand measure than the sack of yard clippings?

1. Science

Car has more speed becoz it has less mass than truck

posted on December 14, 2018
2. math

you are correct i just needed help in this problem .thank you .

posted on January 28, 2018
3. math

sex

posted on February 25, 2017
4. Chemistry

Oops.. The subject for this one is calculus, not chemistry

posted on December 7, 2015
5. math

i don't know

posted on November 27, 2015
6. finding perimeters

Find the area of each square given s = 3.5yd

posted on February 4, 2013
7. math

The answer is 8 feet remaining. 11-3=8

posted on November 14, 2011
8. math

6lbs,2oz

posted on November 14, 2011
9. math

posted on November 10, 2011
10. math

60*7=420 420+38=458

posted on November 10, 2011
11. math

14, 522

posted on November 10, 2011
12. math

10

posted on November 10, 2011