Bria

Most popular questions and responses by Bria
1. Chemistry Honors 10th

How much heat is required to warm 122 g of water by 23.0 degrees Celsius?

2. chemistry

2.4g of a compound of carbon, hydrogen and oxygen gave on combustion, 3.52g of CO2 and 1.44g of H2O. The relative molecular mass of the compound was found to be 60. a)What are the masses of carbon, hydrogen and oxygen in 2.4g of the compound? b)What are

3. Chemistry

You have two gas-filled balloons, one containing He and the other H2. The H2 balloon is twice the size of the He balloon (let the He balloon have a volume of 1 -L and the H2 balloon. a volume of 2 L). The pressure of gas in the H2 balloon is 1 atm while

4. Math

A new law requires that 12% of an individual's income be invested in the stock market. Your accounts show that you need to put \$420 in the stock market this year. How much did you earn this year. My Guess is 3,500% But Its a guess i would like to know how

5. precalculus

After 3 hours the number of bacteria in a culture is observed to have doubled. Find the number of bacteria present after 8 hours.

6. Chemistry

Write the net ionic equation for the precipitation reaction between ammonium sulfide and cadmium nitrate.

7. math

I hope i am on the right track. Please look at my answer so I am doing correctly. The letters of the word mathematics are written on separate pieces of paper and put in a hat. What is the probability of drawing a vowel from the hat? (vowels are a, e, i, o

8. Physics

Workers have loaded a delivery truck in such a way that its center of gravity is only slightly forward of the rear axle, as shown in the drawing. The mass of the truck and its contents is 6675 kg. Find the magnitudes of the forces exerted by the ground on

9. probability

The letters of the word mathematics are written on separate pieces of paper and put in a hat. What is the probability of drawing the letter m from the hat? my first answer is 2/12= 1/6 someone else has 2/11 please show us the correct answer thanks!

10. chemistry

The KHP used in the titration with NaOH was contaminated with sodium hydrogen phyhalate (NaHC8H4O4), but you didn't know it. State the effect of the final result (falsely high, falsely low, or unaffected) Explain. thanks These problems must be reasoned

11. precalculus

After 3 hours the number of bacteria in a culture is observed to have doubled. Find the time that it takes the culture to grow to 30 times its initial size.

12. chemistry

2.4g of a compound of carbon, hydrogen and oxygen gave on combustion, 3.52g of CO2 and 1.44g of H2O. The relative molecular mass of the compound was found to be 60. a)What are the masses of carbon, hydrogen and oxygen in 2.4g of the compound? b)What are

13. chemistry

A buffer is formed by mixing 100 mL of 0.2 M HClO2 and 200 mL of 0.7 M KClO2. What volume of 0.2 M KOH can be added before the buffer capacity is reached?

14. Math

Using the expression 56xy + 5 -6x + y/20,find the following: a. Find two sums. b. find the terms of the expression. c. find a product of two factors. Find the coefficient in the product. d. Find the quotient. This is to hard. Where do I start?

15. Math

The mean of five numbers is 8. If one of the numbers is removed from the list, the mean becomes 7. what is the number that was removed. I could not figure this out.

16. chemistry

If a solution of 0.10 M silver nitrate, AgNO3, is slowly added to a solution containing 0.010 M potassium iodate, KIO3, and 0.20 M sodium bromate, NaBrO3, what precipitate will form first. Will this precipitate form nearly completely (99%) before the

17. chemistry

HCl is titrated with NaOH. When doing the titration, some of the NaOH splashed onto the inside surface of the Erlenmyer flask, and you forgot to rinse it into your sample. Would the systematic error be falsely high, low, or unaffected and why? Thanks. As I

18. MPG

a passenger car will go 525 miles on 17.5 gallons of gasoline in city of driving. what is the rate miles per gallon?

19. Math

Which best describes the relationship between the lines with equations 8x+y=6 and 16x+2y=0 (a) perpendicular (b) parallel (c) same line (d) neither parallel nor perpendicular

20. chemistry

HCL is tritrated with NaOH. KHP is then added. A possible source of systematic error in this experiment is failure to dry the KHP. If this occured, would the final wt% NA2CO3 be falsely high, falsely low, or unaffected. Give reasoning. Thanks. You have

Who made use of Hester Prynne's skilled needlework? Why?

22. math

Suppose 48% of the general population of thw world has blood type O, 27% blood type A, and 23% blood type B. a. what is the probability that someone has type AB blood( assume that there are only four blood types? b. Of tjere are 30 people in a room,how

23. chemistry

We are determining the molarity of HCl by titration of HCl. What would be the complete equation and the net ionic equation? THanks What are you titrating it with? Won't that make a difference in the equation we write? It's titration of HCl with NaOH.

After defining the scope of the system, the next step is to: a) conduct a feasibilty study. b) determine requirements. c) form the project team?

25. chemistry

Calculate the ionic strength of the solution. a) 100 mL of 0.8M magnesium perchlorate, Mg(ClO4)2, is added to 900 mL of 0.30M perchloric acid, HClO4. No reaction. B)25 mL of 0.200M potassium iodide, KI, are mixed with 75 mL of 0.0300 M silver nitrate,

26. chemistry

I have to find the weight percent of Na2Co3 for my lab report that's due tomorrow but I have no idea how to do it. In the lab I had to wdight 0.4 g of the unknown soda ash sample into an erlenmyer flask and add about 50 mL of deionized water. Then I had to

27. statistic

what type of correlation would you expect to exist between people's height and their shoe size? My answer is a positive correlation.

28. oz

IT TAKES 60oz of grass seed to seed 2400ft^2 of lawn. at this rate, how much will be needed for 4400ft^2 of lawn?

29. notation

precent notation of 5/8

30. Math

What is the cardinal number for the follwing sets? 1). 101,102,103,104,....121 2). (1,2) (101,102) (0,105)

31. english

on my first baby-sitting job ,I found that one must have____patience to take care of young children

32. Geometry

Find the surface area of a cylinder whereas diameter is 9 ft and height is 24 ft

33. math

1. A card is drawn from an ordinary deck of 52 playing cards. What are the odds in favor of drawing an ace? 2. The letters of the word mathematics are written on separate pieces of paper and put in a hat. What is the probability of drawing a vowel from the

34. world history

The animating principles of Benedict's rules for monks are the quest for salvation and

HOW DO YOU YOU ADD ALL THE HEARD MATH WITH THE EASY

36. idk, math i guess

if the average person drinks 8(8 oz.) glasses of warter per day,rather than a person who drinks 12 8 oz. of warter after a morning excersise session has consumed what fraction of the daily average?.

37. math

what fraction of 1 liter is 1 milliliter?

38. math

1).Write the first five terms of the sequence whose nth term is -10n-1. 1ST_ 2ND_ 3RD_ 4HT_ 5TH_

39. Math

What is the cardinal number for the following sets? A) 101,102,103,104,.......121 B) (1,2), (101,102), (0,105)

40. math

what is 121 divided by 4(8 - 2)!

41. statistic

1.The state highway patrol stops every 5th car on highway 210 to check drivers' licenses and registrations. Which sampling technique are they using? systematic sampling -chose this one convenience sampling cluster sampling simple random sampling stratified

42. statistic

Which "average" would be best to use in the following situation? The accountant for a small company is asked to determine the average salary of its employees. The company is owned by two brothers who each make over \$300,000 per year. The accountant makes

43. commission rate

a salesperson earns 150 commission selling 3,000 worthof television sets. what is the commission rate?

you push a book on a table so that its velocity is constant. If the force you apply is 15 N, what is the force due to sliding friction

45. math

i am a three-digit number. i am made up of three different numerals. i am divisble by eleven.

46. fractions URGENT!!!!!!!!!!!!!!!

Is 2/3 the smallest out of 1/3? Are you asking if 2/3 is smaller than 1/3? If that's your question, the answer is no. If that's not your question, please rephrase so teachers will understand. Thanks. =)

47. geography

List as many ways as you can remember about how you are involved in the burning of fossil fuels on a dily basis.

48. probability

3. A bag contains five different lightbulbs. The bulbs are the same size but each has a different wattage. If you select three bulbs at a random,how many different outcomes will be in the sample space if the bulbs are selected without replacement? I

49. math

Tom plans to purchase a used car for \$18,450. The dealership will finance his purchase at 10.5% APR for 48 months. Calculate the amount of Tom's monthly payment if he makes a down payment of \$3,450 on the car

50. math

How much interest will you earn on \$5,000 if you invest the money in a 5-year certificate of deposit earning 3% compounded quarterly. Round your answer to the nearest cent.

51. Math

The cost for a 30-second ad during the 2010 Super Bowl was \$2.8 million. Assuming the rate per second to be constant, what was the average cost per ad that was broadcast during the Super Bowl in 2010? Express your answer as a whole number to the nearest

52. chemistry

The percentage of phosphourus in a detergent product may be determined by sample treatment including the precipitation of magnesium ammonium phosphate MgNH4PO4*6H2O (MW=245.41), using an excess of both magnesium and ammonium ions. The separated ans washed

53. math

If the the total enrollment in LA county combined schools was 1,583,283 students in 1997, approximately how many of those student were Asian at 8.1 8.1% choices: 194,467, 904,055, 128,246 , 19,546,704, 1,282,459 my answer is 128,246 multiplied

54. TI 84 Plus

How do i get to the regression equation on the ti84 plus calculator. I am working on a math problem trying to view my equation once i plugged in the data

55. statistic

If the total enrollment in LA County Combined schools was 1,583,283 students in 1n 1997, approximately how many of those students were Asian. Other =2.70% White =20.30% Black =11.80% Asian = 8.10% Hispanic 57.10% answer: I multiplied

56. statistic

The data below represent the ages of female actors at the time of winning an Oscar (1956 - 1996). 41 27 34 34 41 30 61 42 49 27 31 60 34 35 74 21 29 39 39 37 61 26 31 33 41 33 38 30 26 37 41 49 26 35 28 24 35 42 33 38 81 45 What is the frequency for the

57. Probability

If a women with a BMI below 25 are considered to be normal weight, how many of these women would be classified as overweight? If you choose a woman at random, what is the probability that she will be overweight. Chart below BMI Frequency 15.0-19.9 9

58. math

If your class has 10 males and 14 females in it, how many different committees consisting of 4 males and 4 females may be chosen.

59. math

find the fracton notation for the ratio 73/88

60. math

(x/8)+ (x/8)= 9/8

61. statistics

last year houston hospital averaged 98 births a month with a standard deviation of 6 january reported 107 birhts. how does the number of birhts in january compare to the average

62. math

2x^2+7x+3/x^2-2x-15

63. statistic

age days in hospital 40 11 36 9 30 10 27 5 24 12 a. draw a scatter diagram (completed) b. does there appear to be a correlation between age and number days in the hospital? no Find the r value for this problem to verify your answer? R=.16 c what is the

64. statistic

age days in hospital 40 11 36 9 30 10 27 5 24 12 a. draw a scatter diagram (completed) b. does there appear to be a correlation between age and number days in the hospital? no Find the r value for this problem to verify your answer? R=.16 c what is the

65. statistic

Choose ALL that represent quantitative data. the amount of time you spend studying each week your street address how many years you have owned your car the company that you use for cell phone service the number of people who live with you your score on the

66. math

Mary has seven decorative vases to arrange on a shelf. How many different arrangements are possible?

67. P I

the amount in a savings account increased from \$60 to \$84. what i sthe precent increase?

-6m+3/11=7

69. math

The sum of what 2 prime numbers equals 16?

1. Math

thx so much R_scott :)

posted on March 4, 2019
2. Chemistry

972 ppm

posted on December 12, 2017
3. social studies

what would be the highest point and lowest ob a topographic map?

posted on November 29, 2017
4. Microeconomics

IDK??????

posted on September 3, 2015
5. Math

posted on April 24, 2015
6. math

need help

posted on March 7, 2013
7. math

okay my answer is correct 128,246

posted on July 15, 2012
8. probability

i figured it out 5*5*5=125

posted on July 15, 2012
9. probability

i typed the wrong answer it is 125

posted on July 15, 2012
10. Math

thanks for the explaning it. I understand that much better

posted on July 14, 2012
11. statistic

thanks!

posted on July 12, 2012
12. statistic

except for the company you use for your cell phone I meant to take that out.

posted on July 12, 2012
13. statistic

I guess to look at it would fall into the salary range. i was looking at average is how i got my answer thanks!

posted on July 12, 2012
14. statistic

thanks i am getting it

posted on July 12, 2012
15. Probability

thanks!

posted on July 12, 2012
16. math

ok, I understand now thanks!

posted on July 12, 2012
17. math

4/11 got it thanks!

posted on July 7, 2012
18. math

2/11 got it

posted on July 7, 2012
19. math

thanks

posted on July 6, 2012
20. probability

11 in mathematics so 2/11

posted on July 5, 2012
21. math

the factors of 8 that she can roll are 4,8,and 8 there are 6 sides to the cube therefore six posibilites total so 3/6 chance because 2/6 chance of rolling 8 and 1/6 chance of rolling 4 2/6 +1/6=3/6

posted on March 1, 2012
22. arithmetic

21terms/3terms=7groups of 3terms 237(last group)-129 (middle group)=36 237(group7)-36=201(group6) group6-36 group5-36 129(group4)-36=95(group3) group3-36 group2-36 add up all group terms(237+201+165...) Hope that's what your looking for if not sorry, but

posted on March 1, 2012
23. Chemistry

ok so for the second part this is what I did. 0.082=x/4=0.328g 0.08969=x/2=0.179g I feel like I have done something wrong though

posted on February 19, 2012
24. Chemistry

Ok so for the first part I got x=0.08969 for H2 and x=0.082 for He. but how do I convert to molecules? Working on the second part now

posted on February 19, 2012

24

posted on September 19, 2011
26. Math-geometry

f t t f f

posted on July 21, 2011

how does a rodeo star get around

posted on November 21, 2010
28. idk, math i guess

is it 1/3

posted on July 14, 2010
29. idk, math i guess

its not homework a family bet.....thnk you

posted on July 14, 2010
30. idk, math i guess

my uncle said wat is the anwser please (he is a middle school drop out)

posted on July 14, 2010
31. idk, math i guess

ms sue

posted on July 14, 2010