# Na

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

Write the balanced chemical equation for the reaction of the weak acid HCN with water. Include the phase of each species.

2. ## chemistry

In the following reaction, how many grams of lead(II) nitrate Pb(NO3)2 will produce 425 grams of sodium nitrate (NaNO3)? Pb(NO3)2(aq) + 2 NaBr(aq) PbBr2(s) + 2 NaNO3(aq) The molar mass of Pb(NO3)2 is 331.21 grams and that of NaNO3 is 85 grams.

3. ## math

A circular pond 26 yds in diameter is surrounded by a gravel path 2 yds wide. The path is to be replaced by a brick walk costing \$50 per square yard. How much will the walk cost?

4. ## physics kinematics

A river flows at 2m/s the velocity of a ferry relative to the shore is 4m/s at right angles to the current what is the velocity of the ferry relative to the current?

5. ## Math

45 divided by 5/11 4/7 divided by 7/8 2 1/2 divided by 4 5/7x =140 Please help Thanks

10h+6-5h+3

7. ## Chemistry

How can we recover NaNO3 from an unsaturated solution

8. ## science

what volume of benzene ( C6H6 d=0.88g/ml molar mass = 78.11) is required to produce 1.5*10^3 kj of heat

9. ## physics

A diver springs upward from a board that is three meters above the water. At the instant she contacts the water her speed is 9.6 m/s and her body makes an angle of 84 degrees with respect to the horizontal surface of the water .

10. ## science

The cider is heated from an initial temperature of 4°C to a final temperature of 65°C. The steam enters the heat exchanger as 50% quality steam and exits as water condensate at 85°C. Calculate the mass of steam required to heat 150 kg of cider. (For the

11. ## physics in kinematics

ebo throws a ball in the air it's velocity at the start is 18m/s at an angle of 37° to the ground express the initial velocity in component vector form?

12. ## Physics

A 1.70-kg block slides on a rough, horizontal surface. The block hits a spring with a speed of 2.00 m/s and compresses it a distance of 11.3 cm before coming to rest. If the coefficient of kinetic friction between the block and the surface is μk = 0.534,

13. ## Error Analysis

Please help me find the wrong grammar, word use and sentences structure for me.. *It's not essay. It's my homework from teacher to modify What can you do to reduce global warming in Thailand Global warming is big problem for the word. Now, the word want

14. ## PHYSICS

An electron is located on a pinpoint having a diameter of 2.04 µm. What is the minimum uncertainty in the speed of the electron?

15. ## chemistry

Mr. Arswan iss preparing a mixture for a science experiment. He measures 10.5 grams of wood shavings, 150 grams of iron filings, and 18.50 grams of salt. What is the total mass of Mr. Arswan`s mixture? A 30.5 grams B 179 grams C 150.5 grams D 17.9 grams

16. ## algebra

Jacob and Robert work at a restaurant. On Friday night, Jacob earns \$12 per hour and Robert earns \$7.50 per hour in addition to \$15 in tips. Which graph shows the amount of money earned by Jacob and Robert?

17. ## Algebra

3.To estimate animal populations, biologists count the total number of animals in a small section of a habitat. The total population of animals is directly proportional to the size of the habitat (in acres) polled. a.Write an equation using only one

18. ## Physics Help

A 3.50-inch floppy disk in a computer rotates with a period of 2.02E-1 s. What is the angular speed of the disk?

19. ## physics

A drag racer accelerated from 0 to 475km/h in 4.88 s. Assuming a constant acceleration, how far did it travel?

20. ## physics

a butterfly at eye level is 20 cm in front of a plane mirror. you are behind the butterfly, 50 cm from the mirror. what is the distance between your eyes and the image of the buterfly in the mirror?

21. ## Math

The scale on a map is 1 in: 4 miles. Find the actual distance in miles for each length on the map. 1/ 2 in. Answer: d=8 2/ 7.2 in. Answer: d=288 3/ 3.5 in. Answer: d=140 4/ 11 in. Answer: 44 Write the ratio as a scale in simplest form. 3cm\15cm Answer: 1/5

22. ## Math

Sid wrote 541,309 on his paper. Using numbers and words,explain how the number would change if he exchanged the digits in the hundred thousands and ten places

23. ## english grammar

a or b) for each number as well as an explanation of why you made that choice. just need help explaining why? Answer A 4a. John has become a rather good actor. 4b John has became a rather good actor. Answer A 5a. Some athletes have taken drug tests to

24. ## development

To what extent does development mean more than than economic growth? Development of what? Please clarify your question and tell us what you think the answer is. We'll be glad to critique your ideas.

25. ## Algebra

Determine the measure of each exterior angle. The triangle looks like an upside down A with one line running longer at the point. The inside angles are A- 50 and in the next corner 75. In the bottom of the A-letter I need to solve for C and A and the extra

26. ## Calculus

evaluate each of the following integral:- I= ∫((x^2+ 1)/(x^4+ 1))dx Y=∫(sinhxcoshx)dx/√(sinhx^4+coshx^4)

27. ## English

Write the vocabulary word from the word box that matches each idea. Communicate - flick - alert- signal - chatter - grooms. 1/.............to make neat and clean . Answer: grooms 2/............. to tell a person or animal something. Answer: communicate 3/

28. ## physics

find the distance light travels from its starting point, S, to its final point, F, by traveling two different paths: Note: you'll need to know Pythagorean Theorem.

29. ## geometry

find the 2 missing patterns 1,2,6,24,120,.. 2,4,8,16,32,.. 1,1/4,1/9,1/16,1/25,.. 1,1/2,1/3,1/4,..

30. ## geography

what is a narrow arm of the sea at the mouth of a river where the ocean tide meets the river current called?

31. ## ashford university

Which of the following methods would be most successful for encouraging self-regulation in young children?

32. ## Math

Subtract money amounts 1/ Aidan has \$5.00 to buy a can of tennis balls that cost \$3.79. How much change should he get back? 2/ Sylvia has \$10.00 to buy a hairbrush that cost \$ 6.88. How much change should she get back?

33. ## RECORD MANGEMENT

I NEED HELP IN CODING AND INDEXING RECORDS.

34. ## algebra

f(x)=x+2x+3 and x=1&6

35. ## geometry

find the 2 missing patterns 1,2,6,24,120,.. 2,4,8,16,32,.. 1,1/4,1/9,1/16,1/25,.. 1,1/2,1/3,1/4,..

1. ## Chemistry.

C- O is non polar

posted on March 2, 2018
2. ## health

BBB is correct, thx:)

posted on February 14, 2018
3. ## english

too

posted on January 31, 2018
4. ## Finite Mathmatics

.006

posted on November 15, 2017
5. ## probability

120

posted on September 18, 2017
6. ## Education technology

1) b 2) a 3) a

posted on April 14, 2017
7. ## Math

Oh, I'm sorry. I forgot to write it as a new Question.

posted on March 1, 2017
8. ## Math

Write the ratio as a scale in simplest form. 3cm / 15cm Note: /= as fraction

posted on March 1, 2017
9. ## Math

2/ 28.8 3/ 14 5/ I don't know

posted on March 1, 2017
10. ## Math

posted on March 1, 2017
11. ## Chemistry

i dont know

posted on November 3, 2016
12. ## calculus

no I am trying to teach myself. however would the answer be 3843.33

posted on May 8, 2016
13. ## calculus

but where did you the "1/2 and 1/3" from?

posted on May 8, 2016
14. ## Probability Questions - STAT

0.2/0.8=0.25 for test positive/nodisease

posted on January 6, 2016

physics dynamics

posted on December 31, 2015
16. ## spanish

actually #5 is incorrect and so is #6, I just tried those two and it came up as wrong

posted on September 12, 2015
17. ## Calculus

Thanxxx

posted on December 22, 2014
18. ## phi 208

posted on July 1, 2014
19. ## Math

Q:1 and 2 3/4= 6/8=9/24=12/16=15/20=18/24........ 2/5=4/10=6/16= 8/20= 10/25 My answers true or false

posted on February 19, 2014
20. ## physics

a. 5 b. ? c. 3 d. ?/?

posted on October 9, 2013
21. ## Chemistry...Help!!

this answer is incorrect. The following should be switched: 0.049 L/0.03368 mole =1.455 molar should be 0.03368 mol/0.049 L =0.6873 molar the rest of the steps are correct but you would need to substitute the above number in for the remainder of the

posted on September 18, 2012
22. ## ponctuation, mechanisme, and writing

a or b) for each number as well as an explanation of why you made that choice. just need help explaining why? Answer A 4a. John has become a rather good actor. 4b John has became a rather good actor. Answer A 5a. Some athletes have taken drug tests to

posted on January 9, 2012
23. ## math

“Perpetrators”—students who reported at least one violent act (hitting, shoving, etc.) against their partner in their current or most recent relationship—and

posted on January 13, 2011