1. Chemistry

A sample of 40.0 mL of hydrogen is collected by water displacement at a temperature of 20 degrees Celcius. The barometer reads 751 torr. What is the volume of the hydrogen at STP (standard temperature and pressure)?

2. physics

the muzzle velocity of a 50.0g shell leaving a 3.00kg rifle is 400 m/s what is the recoil velocity of the rifle

3. homeschool

What are the products of the double-replacement reaction between potassium chloride and silver acetate?

4. math

256 consumers polled, some like only thriller movies, some prefer just comedies, and some like both. If 78 people like only thrillers and 116 like both, how many people prefer only comedies? A62 B38 C140 D194 Is it 38?

5. chemistry

When disaccharide beta is hydrolyzed, which monosaccharide units are produced?

6. math Algebra 1

What is the algebraic expression for the following word phrase: the product of 5 more than p and 7? A.5+p+7 B.7(p+5) C.7*p*5 D.p+5 over 7 I think it is A...?

7. AP calculus

The base of a cone-shaped tank is a circle of radius 5 feet, and the vertex of the cone is 12 feet above the base. The tank is being filled at a rate of 3 cubic feet per minute. Find the rate of change of the depth of water in the tank when then depth is 7

8. Chemistry

Given the reaction 2C2H6 + 7O2 → 4CO2 + 6H2O ∆H = -1416 kJ/mol C2H6 a. How many liters of Carbon Dioxide would be produced if 16.00 L of ethane, (C2H6), were burnt (all at STP)? b. How many liters of water vapor would also be produced? c. How many

9. Math

I can't figure out this one question... A ship is docked in port and rises and falls with the waves. The function d(t) = 2sin(30t)°+5 models the depth of the propeller, d(t), in metres at t seconds. e) within the first 10 seconds, at what times is the

10. Math Algebra

5. At the half-time show, a marching band marched in formation. The lead drummer started at a point with coordinates (–4, –7) and moved 4 steps up and 2 steps left. a. Write a rule to describe the translation. I think it is (x,y)-->(x+2,y+4)is this

11. Chemistry

When disaccharide alpha is hydrolyzed, which monosaccharide units are produced? A) D-glucose and D-fructose monosaccharide units B) two D-fructose monosaccharide units C) two D-glucose monosaccharide units

12. English- edit my essay please?

The Great Gatsby Mortality is something we will all face at some point in our life. However, I doubt many people will deal with it in the same light as James Gatz did. He died once in his youth, at the age of seventeen, only to be reborn again as someone

13. physics

a bolwing ball of mass 2.00 kg strikes a stationary pin of mass 5.00 x 10^2 g. the collision lasts for .60s after which the pin moves off with a velocity of 12.0 m/s [w] a)accel of pin during the collision b)force exerted by bowling ball on the pin c)the

14. investing

Which of the following statements is true about financial planning? A. Any kind of financial expert (such as a stockbroker, lawyer, or accountant) can help you develop a comprehensive financial plan. B. Once you have painstakingly developed a financial

15. statistics

In a simple random sample of 50 plain M&M candies, it is found that none of them are blue. We want to use a 0.01 significance level to test the claim of Mars, Inc., that the proportion of M&M candies that are blue is equal to 0.10.

16. English

The following items are run-on sentences. Revise each item either by making two complete sentences, or by adding a conjunctive adverb or semicolon. Change the punctuation and capitalization as necessary. Make all corrections on the sentences below. I was

17. Chemistry

The total mass that can be lifted by a balloon is given by the difference between the mass of air displaced by the balloon and the mass of the gas inside the balloon. Consider a hot air balloon that approximates a sphere 5.00 m in diameter and contains air

18. Stats

students reported studying an average of 9.92 hours a week, with a standard deviation of 4.54. Treating this class as the population, what percent of students study more than 12 hours a week

19. chemistry

An aqueous solution is 0.273m kcl. What is the molar concentration of potassium chloride, kcl? The density of the solution is 1.011 x 1 1000 g/L Who helps me

a student scores 76,82,83 on the first three test, she has a 92 homework averge. if the final exam is 50% of grade and homework is 10% and the test average (nit including the final) is 40% then what grade should she get on the final exam to get a 87.5 in

21. maths

A wall 24m long, 0.4m thick and 6m high is constructed with the bricks each of dimensions 25cm X 16cm X 10cm. If the mortar occupies 1/10th of the volume of the wall, then find the number of bricks used in constructing the wall.

22. chemistry

When disaccharide alpha is hydrolyzed, which monosaccharide units are produced? A) D-glucose and D-fructose monosaccharide units B) two D-fructose monosaccharide units C) two D-glucose monosaccharide units

23. math final review (help)

from a 12cm by 12cm piece of cardboard, square corners are cut out so that the sides can be folded up to make a box. Express the volume of the box as a function of the length, x, in centimeters.

24. physics

the initial velocity of a 4 kg box is 11 m/s, due west. after the box slides 4 m horizontally its speed is 1.5 m/s. determine the magnitude and the direction of the non conservative force acting on the box as it slides.

25. maths --plse help me..

Find the area of the sector of a circle of radius 7cm if the corresponding arc length is 6.2cm

26. chemistry

What's the equation written in a sentence for nh4no3(s)=n2o(g)+2h2o(g)

27. Physics

you weigh 120 lb at the sidewalk outside the world trade center. Suppose you ride from this level to the top of one of its 1350 ft tower. how much less would you weigh

28. chemestry

a 40g piece of ice at 0.0 degrees C is added to a sample of water at 8.0 degrees C. the ice melts and the temp of the water decreses to 0.0 degrees C. how many kilograms of water weere in the sample?

29. english

Combine the following sentences by changing the italicized group of words into a gerund or gerund phrase.I lost my wallet. This caused me great inconvenience.

30. Letter to Mrs.Sue

Mrs. Sue I'm sorry for my behavior. I know you'll never forgive me but I'm sorry.

31. chemistry

What is the type of glycosidic bond in case alpha?

32. Math

A rancher has 220 feet of fencing to enclose a rectangular corral. Find the dimensions of the rectangle that maximize the enclosed area, using all 220 feet of fencing. Then find the maximum area.

33. physics

One strategy in a snowball ﬁght is to throw a snowball at a high angle over level ground. While your opponent is watching this ﬁrst snowball, you throw a second snowball at a low angle and time it to arrive at the same time as the ﬁrst. Assume both

34. Mathematics

The expression 1/3 log (a)-3 log(b) is equivalent to_________, i know the answer but i don't know how to get it.

35. Math

A map has a scale of 2cm=15km. If the distance between two cities on the map is 9cm, what is the actual distance between the cities?

36. Physics

The weight of an object on Earth is 350 newtons. On Mars, the same object would weigh 134 newtons. What is the acceleration due to gravity on the surface of Mars, given that it is 9.8 meters/second2 on Earth?

37. statistics

) The personnel manager of a consumer products company asked a random sample of 300 employees how they felt about how they felt about going to a flex schedule, which would allow employees to choose their arrival and leaving times, on a five day schedule.

38. trig/precalc

An airplane with a ground speed of 750 mph and a bearing of N 40 E encounters a wind of 50 mph with a bearing of S 30 E. Find the bearing and ground speed of the plane.

39. environmental science

why are cultivation practices for pest control not widely used today?

what does research show about the child's relationship with the primary parental figure when the child has additional attachments to other people?

41. Programming in c++

Write a program in c++ that inputs a number [1-12] from the user and displays the month. it also asks the user whether he wants to input another number or not, if the user inputs 1 then it again inputs number, if user inputs 0 then program ends.

42. math

in triangle ABC, line BF is angle bisector of angle ABC, line AE, line BF and line CDare medians, and P is the centriod. find Xif DP = 4x-3 and CP=30

43. Math Algebra

The length of the hypotenuse of a right triangle is 30 m. The length of one leg is 20 cm. Find the length of the other leg. Round your answer to the nearest tenth I know how to do hypotenuse but this doesn't seem to work out...help please

44. physics

A uniform beam of length 7.60 m and weight 4.30 102 N is carried by two workers, Sam and Joe, as shown in the figure below. (a) Determine the forces that each person exerts on the beam. F_Sam = ___ N F_Joe = ___ N

45. Intermediate Algebra

Standing on a platform 60 feet high, a person accidentally fires a gun straight into the air. the formula h=-16t^2+100t+60 describes the bullet's height above the ground, h, in feet,t seconds after the gun is fired. how long will it take for the bullet to

46. history

To what extent is the following statement accuate? "During the 1960s, the United Sates had become a more open, more tolernt, freer country."

47. physics

The puck in the figure below has a mass of 0.160 kg. Its original distance from the center of rotation is 40.0 cm, and it moves with a speed of 60.0 cm/s. The string is pulled downward 15.0 cm through the hole in the frictionless table. Determine the work

48. physics

A particle travels horizontally between two parallel walls separated by 18.4 m. It moves toward the opposing wall at a constant rate of 9.4 m/s. Also, it has an acceleration in the direction parallel to the walls of 5.8 m/s^2 What will be its speed when it

139. Physics

The tension in a rope attached to a boat is 27.5 lb. The rope is attached to the boat 6.0 ft below the level at which the boat is being drawn in. At the point where there is 18.0 ft of rope out, what force is bringing the boat towards the dock, and what

140. statistics

Then, for the following two examples, determine the null and alternative as well as state which one represents the claim. State what type of test will be completed: left-tailed, right-tailed, or two-tailed. The average score of the first exam for the class

141. math using rule 78

a loan for $400 is to be paid off in 66 months witha payment of$11.62 The borrowee pays it off in 18 months use rule 78 to find the interest saved

142. science

what are the altitude ranges of the troposphere, stratosphere, mesosphere, and the thermosphere?

143. ALG 2 PLZ PLZ HELP

As you can see, the biker and his friend are having a hard time getting up the hill. They would like to get to the top safely. Two ordered pairs on the hill are given as (6, 3) and (8, 7). Part 1: Find the slope of the hill. Slope (m) = change in y over

144. English

What is meant by the subthemes: death as pervading life, time as the essence of death and self destruction, night as the environment of death, and death as the great isolator as applied to Pablo Neruda's poems, especially Residence on Earth?

145. math

I family of ducks contains 7 ducks which are 44 lbs. The other wieghs 32 lbs (no amount of ducks given) How much does each duck and duckling weigh in each group THEY HAVE TO WEIGH THE SAmE IN EACH GROUP

146. Social Studies - URGENT

Using the five themes of geography, which theme best illustrates each statement: Location, character of place, human-environment interation, movement or region. 1. Islam spread to Eastern Europe from Southwest Asia 2. The Scandinavian countries share

147. maths

which is valuable abacus or vedic maths?

148. maths --plse help me..

Is eulers formulae true for spheres and cylinder ,please explain

149. calculus

A 6 m3 box with a perfect triangle base and lid and 3 rectangular walls is to be constructed from 2 materials. The cost to make the base 1$/ft2 and that for the lid and walls is 4/2$/ft2. What dimensions will result in the most cost-effective

Find the sum of each infinite series, or state that the sum doesn'nt exist 1/7+5/14+25/28+

an automobile to be transported by ship is raised above the dock by a crane. If the gravitational potential energy of the car is 6.6 x 10^4 and the mass is 960 kg how high has the car been lifted?

152. Intermediate Algebra

For the quadratic equation y=(x-3)^2-2. Determine: A) whether the graph opens up or down; B) the y-intercept; C)the x-intercepts; D) the points of the vertex. and D) graph the equation with at lease 10 pairs of points.

153. calculus

*find the slope of y= 4/x +6 at the point (8,2) *evaluate the derivative at the point (pi,4) y=[tan(5x^8)]^3 please help

154. Calculus

Evaluate the integral by changing to spherical coordinates. The outer boundaries are from 0 to 1. The middle one goes from -sqrt(1-x^2) to sqrt(1-x^2) The inner one goes from -sqrt(1-x^2-z^) to sqrt(1-x^2-z^) for 1/sqrt(x^2+y^2+z^2) dydzdx I don't