1. Chemistry

Use the Bronsted-Lowry definitions to identify the two conjugate acid-base pairs in the following acid-base reaction: H20 + H20 H30^+ + OH^- Let's see what you think on this after the previous post. Just remember, the acid is the one that HAS the H and the

2. Chemistry

Classify the following as: Weak or strong acid, weak or strong base, salt (from weak/strong acid and base). If appropriate, split the formula into its component ions. HNO3 So far, all I have is: HNO3 + H2O -> NO3^- + H3O^+ And I know HNO3 is a strong acid.

3. Chemistry

Use the Bronsted-Lowry definitions to identify the two conjugate acid-base pairs in the following acid-base reaction: HCO3^- + S^2- HS^- + CO3^2- I got it. HCO3^- is the base in the pair with CO3^2-. S^2- is the acid in the pair with HS^-. Would you

4. chem

is window cleaner an acid or base acid? Most window cleaners are basic. Many have the odor of ammonia. The ammonia odor usually comes from ammonia or some low molecular weight amine. The bottle of Windex I have at home contains "ammonia D", which I think

5. algebra

Solve the system by addition or substitution. 16x-4y=20 y=4x-4 I ask for help with this and forgot to add the problem. can anyone help me understand how to do this? 16x-4y=20 -4x+y=-4 ___________ 16x-4y=20 (4)(-4x+y=-4) ______________ 16x-4y=20 -16x+4y=-16

6. micro

Homework or not, you need to post your question and how far you've gotten in your thinking toward the "answer" in order for someone here to be helpful to you. Please be patient and wait for someone with economics expertise to respond to you. Thanks. that's

7. math/algebra1a

write the equation of the line which has y-intercept (0,5) and is perpendicular to the line with equation y=-3x +1 a) y=-3x + 5 b) y= 1/3x + 5 c) y= 3x + 5 d) y= -1/3x + 5 The slope of the 2nd equation is -3...because the equation of a line is y=mx+b,

8. micro

On one society A the price of an apple is \$3 and the price of an orange is \$7, while on socity B the apple and orange are the same price, \$4. society A people consume 10 apples and 8 oranges while societyB people consume 8 apples and 12 oranges. Which

9. math

Determine which tow equations represent perpendicular line. (a) y= 3/8 x -4 (b) y= 4x - 3/8 (c) y= - 1/4 x + 3/8 (d) y= 1/4 x - 3/8 b and c. Perpendicular lines have slopes which are negative reciprocals of each other. So 4 and -1/4 work.

10. Math

I have been asked to solve the following system of linear inequalities by graphing. I tried replacing with various numbers but even though the they work in the equations my graphs change from consistent to inconsistent. Please help.

11. Physics

My question is How do I calculate the resultant force if I have two forces one heading 3N and the other 4N. Tha angle between the line that is 3N and the resultant force is 30 degrees and the other one which is the 4N is 60 degrees How do I calculate the

12. science

How do I predict how long will it take for lava to reach the town, which is 10km from the lava vent, if I know that after 2 days lava was 5 km far from the vent. Thank you Lava traveled 5 km in 2 days. How long will it take for lava to travel 10 km? But

13. Math

A virus scanning program is checking every file for viruses. It has completed checking 40% of the files in 300 seconds. How long should it take to check all the files? I am not sure how to set this problem up, can someone please help! 40% = 40/100 40/100 =

14. English

I need to find specific questions and specific answers about these two books: 1- Tangerine, by Edward Bloor 2- Gilda Joyce-Psychic Investigator I don't need stuff like "What is the setting and theme?" but more specific q's and a's, like "What COLOR was her

15. Math

Responding back as requested: This is all I was provided Solve the folowing system of linear inequalities by graphing. x + 2y is less than or equal to 3 2x - 3y is less than or equal to 6 I would change the inequality into slope intercept form and treat it

16. chem

is vegetable oil a base and vinegar an acid? [i mixed up the litmus strips and now i don't know which one is which and i'm out of the strips so i can't do it again] Vinegar is an acid, for sure. Vegetable oil is not soluble in water; therefore, its acidity

17. Management accounting

suppose one chairlift costs \$2 million and the slopes and the lift had to be install for \$1.3 million, and the lift let 300 skiers on the slopes, for 40 days out of a year) Running the lift cost \$500 a day for 200 days for the ski resort openings, now

18. Written Communication

How do you rewrite this sentence : The article about American history stated , " The revolution began over a beer ( during Prohibition ) and ended with a bang First of all, which revolution are you talking about. In US history, "the revolution" usually

19. computers

Once you defragment a computer, do you lose files in your history or bookmarks or anywhere? If that's true, is there any way to get them back? Defragging should not erase any of those types of files. Only when you use specific delete commands or use the

20. math/algebra1a

Write the equation of the line passing through (-3, -5)and (3,0). (a)y= -6/5x - 5/2 (b)y= 5/6x - 5/2 (c)y= 5/6 x + 2/5 (d)y= -6/5x + 2/5 You have to get the slope of the line using equation y2-y1/x2-x1. [0-(-5)]/[3-(-3)] = 5/6 Now that you have the slope,

21. math/algebra1a

write the equation of the line with x-intercept (-7, 0) na d undefined slope. a) y= -7 b) x= -7 c) y= -7x d) x= 0 The answer is b. This is because an undefined slope is m/0. So, its just a vertical line. Since x=-7, that's the line.

22. math/algebra

find the slope of any line perpendicular to the line through points (6,7) and (5,8). a)-1 b)1 c)0 d)undefined y2-y1/x2-x1 = slope So...(8-7)/5-6) = 1/-1 = -1 The slope perpendicular to that would be the negative reciprocal of -1, which is 1. Therefore, the

23. Ethics 2

Post a summary of a current issue between Native Americans and the federal government. Identify the legislation that you think is linked to the issue and explain why you think there is a connection.

24. written communication

Write a positive message to the supervisor of someone who went above and beyond the call of duty to help you. Previously answered: ------------------- Posted by bobpursley on Saturday, March 17, 2007 at 6:48pm in response to written communication. We will

25. World History

I need help finding examples of imperialism in today's world? And then explain why is it an example of imperialism.I need to use these examples to write an essay. CAN ANYONE PLEASE GIVE ME SOME IDEAS. PLEASE HELP THANKS ALOT Thank you for using the Jiskha

26. Matt

plot the point with coordinates (-4, 3). Help I'm not really sure what you are asking, but I hope some of this helps: The horizontal line is the x axis. You have to plot -4 on that axis, because -4 is the x coordinate. The vertical line is the y axis. Plot

27. math

what was the percentage increase in the age 75+ population of europe from 1970 (22,762) to 1995 (38,139) PercentIncreas= (38139-22762)/22762 *100

28. Nutrition

I am needing to know what effects caffeine and alcohol have on hydration levels in the body. Any help would be appricaiated! (Broken Link Removed) Alcohol dehydrates, but fortuantly, alcohol is often consumed with a lot of diluting water, so the effect is

29. algebra

Solve the system by addition or substitution.

30. language arts

we are reading a book called the pearl and we have to answer a few questions andi need help wiht this one: what are the possibilities that a pearl could be the size of a seagulls egg? According to a Wikipedia article about pearls, the largest pearl ever

31. algebra

Given f(x) = 2x - 5, find f(-3a). F(x)= 2(-3a) -5 F(-3a) = 2(3a)-5 = 1 did I do this right? You went from: f(-3a) to f(3a) Also, what happened to the "a?" Matt

asked by think I got it
32. algebra

can anyone tell me how to do this i am so lost. The sum of two numbers is 37. Their difference is 7. What are the two numbers? x = one number so x+7 + x = 37 2x= 30 x=15 other number x+7 or 22 Check 15 + 22 =37

33. Math

1. A school had 900 students at the start of a school year. If there is an enrollment increase of 7% by the beginning og the next year, what is the new enrollement? Did I do it correctly? 900/b=7/100 7B=900*100 7B=90000 B=90000/7 B=72,857 If B is suppose

34. l.a.

what scenes from othello would any of you recomend for my school movioe? I think that Act 3, Scene 3 would be a fun one to do. http://www.sparknotes.com/shakespeare/othello/section5.rhtml

35. General

How would you say the leadership at Enron impacted the organization, the customers, and the employees? http://www.google.com/search?q=enron+leadership&rls=com.microsoft:en-us:IE-SearchBox&ie=UTF-8&oe=UTF-8&sourceid=ie7&rlz=1I7SUNA There are many ideas in