1. chemistry

4gm of NaOH can be neutralised by? 1) 100ml of 1N HCl 2) 200ml of N/2 H2SO4 3) 1000ml of N/10 KOH 4) 2000 ml of M/20 H3PO4

2. math

a garden 7m by 12m will be expanded by planting a border of flowers,the border will be of the same width around the entire garden and has an area of 92m

Sydney drew a scale diagram of a circular fire pit in the centre of a circular patio with an actual circumference of 15m. The circle containing the fire put is a reduction of the circular patio by a scale factor of1/3. A.) Determine the diameter of the

4. English

Choose the correct form of the possessive for the underlined word in the following sentence: “A YEARS worth of hard work has finally paid off.” ( "years" is underlined) should it be: year years years' year's

5. english

give the substance of the poem daybreak.

6. Science

750 ml of nitrogen are collected over water at 25•c and 740mm pressure of the aqueous tension at this temperatures is 23.8 mm hg. calculate the mass of dry gas

7. history

The idea of the Mandate of Heaven was: A. introduced in the Bhaghavadgita. B. borrowed from Tibetan nomads in the fifth century B.C.E. C. introduced by the Zhou dynasty and it served to legitimize its power. D. contained in the Rites of Mao.

8. physics

one cubic meter of water hass a mass of 1.0x10^-3. (a) determine the mass of 1.0 m^3. (b) assu!ing biological substance are 98% water, estimate the mass of cell with a 1.0 micrometer dia!eter, a human kidney and a fly. assume a kidney is roughly a sphere

9. education

___________ focus on how people use messages to influence each other in various contexts and cultures, using a variety of media. A. Public speakers B. Radio personalities C. Motivational speakers D. Communication researchers

10. Mathematics

Mathematics: A chord of radius 12cm subtends an angle of 150 degree at the centre of the circle. Calculate. A. Perimeter of the circle (Ps) B. Area of the circle. (Account) C. Length of the circle (Lc) D. Length of the arc (Last) E. Perimeter of sector

11. Physics

One ball has 7 times the mass and twice the speed of another. 1. How does the momentum of the more massive ball compare to the momentum of the less massive one? Find the ratio of the momenta. 2. How does the kinetic energy of the more massive ball compare

12. Scient

(NaCl) solutions used in intravenous injections have a concentration of 0.90% NaCl (mass/volume). 4.5grams of NaCl are needed to prepare 500.0 mL of this solution How much water must evaporate from this solution to give a solution that is 9.0% NaCl

13. math

Use the digits 4,5,6,7 and 8 only once.Write the greatest number possible with 8 in the ten thousands place

14. math

Find the zeroes v^2+4root3v-15 & also verify relation b/w zeroes & its coefficient.

15. Chemistry

A solution is made by dissolving 32g KCIO3 in 100g H20 at 80C. The solution is cooled to 10C. Describe what you would observe as it cooled and state what temperature this first occurs at. What mass of crystals would settle out of the solution?

16. Physics

a ball of mass 100g is dropped from the top of a vertical cliff 45m high. Given that the velocity just before striking the sandy beach is 30m/s and the ball penetrates the sand to a depth of 10cm. Determine its average retardation force

17. Science

A body is thrown vertically upwards with a velocity of 98m/s. If g=a=9.8 m/s when will it reach its highest point

18. physic

A particle is pushed horizontally by a constant horizontal force of magnitude F, which starts from the rest at x=0 in the positive ݔ direction. During the movement, it is also acted by the air resistance force that equivalent to bv, where b is the

19. math

nth terms of 2,4,6,8,10

20. English

1. Take out a pencil out of the pencil case. 2. Take out a pencil from the pencil case. 3. Take out a pencil in the pencil case. ---------------------- Are they all grammatical? Does #1 mean #2? Which one is a common expression? Is #3 okay? Does #3 mean

21. Science

Calculate average velocity of a minute hand of 5cm long from between 6am to 6:30am

22. science

Two charges placed at a distance r apart exert force F on each other at what distance will these charges experience same force in medium of dielectric constant K.

23. Math

Two ships leave a lighthouse from opposite directions.The speed of ship A is 8 Km/h faster than ship B. at the end of 60 hours the two ships are 4320 km apart. Find the speed of two ships

24. maths

an unbiased die rolled n times. what is the probability that the product of the scores is an even number

25. Mathematics construction

Construct triangle xyz such that x=z=45degree and xz=8cm

26. Physics

I understand that I have to use newtons laws of motion but I don't really get how to aplly them to this problem. Please help. An aircraft with a mass of 11000kg moving at constant speed and altitude is powered by propellers and experiences drag from air.

27. INT 1111

QUESTION 1 When using the OR logical operator to connect 2 conditions to create a complex Boolean expression, neither the first condition nor the second condition has to be true for the complex Boolean expression to be true. True False QUESTION 2 String

28. Science physics

The least count of a screw gauge is 0.001cm the diameter of a wire measured by it is 0.225cm. Find out the percentage error in this measurement

29. fundamental of chemestry

calculate the concentration of acetic acid in a 0.85 M sodium acetate solution,when pH=7,knowing that for the acetic acid,Ka= 1.76 x 10-6

30. English grammar

What is the prepositional phrase is the following: 1. We were doing a mathematical test when the fire alarm rang yesterday. 2.The new girl in our ESL class has a brother I grade 7 and a sister in grade 9. 3.I didn't know what time it was so I very late to

31. physic

An ant with mass 0.15 g lands on one end of a floating 4.75 g stick. After sitting at rest for a moment, it runs toward the other end with a speed of 3.8 cm/s relative to the river. What is the speed of the stick if it moves in the opposite direction? A)

32. English

1. I cannot but stay with him. 2. I cannot help staying with him. 3. I cannot choose but stay with him. 4. I have no choice but to stay with him. ------------------ Are they all grammatical. I know 'help' means 'avoid.' Then what does 'but' mean in #3 and

33. English

1. I can't stand you grumbling all the time. 2. I can''t stand you who are grumbling all the time. 3. I can't stand you who grumle all the time. --------------------- Does #1 mean #2 or #3? Which one is similar to #1, #2 or 33?

34. computer science

QUESTION 1 When using the OR logical operator to connect 2 conditions to create a complex Boolean expression, neither the first condition nor the second condition has to be true for the complex Boolean expression to be true. True False QUESTION 2 String

35. Physics (Normal force and static coefficient)

Calculate the normal force for a 2 kg object at rest on an inclined surface, α=42 degrees How much is the static coefficient of friction between the surface and the block ---- My work: N = mg*cos(θ) N = (2kg)(9.8n/m^2)cos(42) = 14.57 N F = µsN µs = F/N

36. Science

According to the Lewis Acid/Base theory, what is the neutralization equation of Acid Nacl and Base AlCl3? NaCl+AlCl3----> (NaCl+AlCl3-----> Na+AlCl4 is incorrect)

37. math

If the zeroes of the quadratic polynomial x^2+(a+1)x+bare 1& -3 find a&b

38. Biology

What is the actual storage of energy in the muscles? ATP or Glycogen?

39. History

Compose a brief essay between 400 and 600 words (not including your references list) in which you answer the following question, referring to and critiquing relevant ideas from at least three of the Week 2 readings as you develop your thoughts: QUESTION:

40. Physics

A soccer ball is kicked with a speed of 9.35 m/s at an angle of 25.0 ∘ above the horizontal. If the ball lands at the same level from which it was kicked, how long was it in the air? Please help!

Density

42. geometry

find the shaded area. round to the nearest tenth if necessary 15cm 21cm 12cm 27cm

43. MATH

FIND THE LENGTH OF AN ARC ANGLE IS 60 DEGREE AT THE CENTRE OF A CIRCLE OF RADIUS 3CENTIMETRE

1) Which tube will be most 'yellow' at the end of the experiment? a)Substrate Concentration: 0.006M Inhibitor: absent b)Substrate Concentration: 0.006M Inhibitor: un-competitive inhibitor present c) Substrate Concentration: 0.0005M Inhibitor:

45. physics

calculate the net force required to give a 3000kg trucks an acceleration of 2.5m/s^2

46. math

still need help: Write an arithmetic sequence that has a common difference of 4 and the eighth term is 13. What is the first term? What is the 23rd term in the sequence

47. Math

The diagram Shows a right-angled triangle abc in which ab =12 cm and Ac=15 cm Show that the length of bc is 9 cm

48. physic mechanic

An ant with mass 0.15 g lands on one end of a floating 4.75 g stick. After sitting at rest for a moment, it runs toward the other end with a speed of 3.8 cm/s relative to the river. What is the speed of the stick if it moves in the opposite direction?

49. English

1. Why don't you take a few days off? 2. Why don't you take off a few days? -------------------------- Are both the same in meaning? What other expressions can we use instead of 'take off'?

50. Computer Science

I haven't done this before and I need some help starting this: A programmer is writing a total ticket price calculator for a theme park. The park offers the price of £13 per adults and £8 per child. There is a bulk purchase discount of 10% off the total

51. accounting

Tyler Constructions constructed a new campus block to house Business School. The building cost a tool of $180,000,000 to construct and was completed 30 March 2011, with an expected useful life of 60 years and residual value of$10,000,000. The building is

52. Maths

Joanna is 15 years younger than Anna. Now after 10 years Anna will be twice the age of Joanna. Find their present age?

53. Algebra

two question, please explain If you have an equation x^2=k and k>0, then there will be If you have an equation x^2=k and k=0, then there will be

54. Math

How much water do i need to mix with potassium chloride to make 30 cc

55. Math Probability (Coin Flip)

Two People flip a coin, Each person flips it 50 times, Each person then counts the number of heads, What is the probability they both get the same number of heads?

56. Math 5

A test in science is scored in the ff. way. Each correct response score 5 points while each wrong response scores 2 points. Ryan got 15 correct answers out of 20 item test. What was his score????❓❔

57. area of a circle

What is the aera of the circle whose center is at (2,3) and that's tangent to x-axis?

58. Year 10 Geography

q) what are some treaties and agreements that are relevant to tourism in NSW Australia?

59. English

1. I can't concentrate on work. 2. I can't concentrate at work. 3. I can't concentrate (on something) at work. ------------------ Which one is correct? Does #1 mean #3?

60. Physics

A period pulse travel a distance at 20m in 1•00sec,if it's frequency is 2•0×10.calculate the wave length

61. math

if a=5-2\sqrt{6} then find the value of a^2+\frac{1}{a^2}

62. math

If x= \frac{ \sqrt{a+2b} + \sqrt{a-2b} }{ \sqrt{a+2b} - \sqrt{a-2b} } Show that: bx^2-ax+b=0

63. Math

Janet bought 7 paperweights and altogether it weighed 1.4 so how much do one weigh

64. Physics

A particle is projected vertically upward from ground with velocity 10 m/s. Find which time particle reaches highest point?

65. science

a particle is projected vertically upward from ground with velocity 10 m/s. Find which time particle reaches highest point?

66. Algebra

If you have an equation x^2=k and k

67. Algorithms

Can I have help on how to do this? A programmer is writing a total ticket price calculator for a theme park. The park offers the price of £13 per adults and £8 per child. There is a bulk purchase discount of 10% off the total price if there are more than

68. Physics

A stone is thrown straight up with a velocity of 24.0m/s from a height of 2.00m. How fast is it moving when it is at a height of 13.0m? How much time is required to reach this height?