# brina

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

When a sample of potassium nitrate is heated, oxygen gas is produced. This gas, collected in a 750 milliliter flask, has a pressure of 2.8 atmosphere and the temperature is recorded to be 53.6°C. How many moles of oxygen gas are produced in this reaction?

2. ## chemistry

35.00mL of 0.250M KOH solution is required to completely neutralize 10.50mL of H2SO4 solution. what is the molarity of the sulfuric acid solution KOH(aq)+ H2SO4 -------> K2SO4(aq) +H2O(l

3. ## math213

Wally kept track of last week’s money transactions. His salary was \$150 plus \$54 in overtime and \$260 in tips. His transportation expenses were \$22, his food expenses were \$60, his laundry costs were \$15, his entertainment expenditures were \$58, and his

4. ## MATH 213

13. Consider the set of northwestern states or provinces {Montana, Washington, Idaho, Oregon, Alaska, British Columbia, Alberta}. If a person chooses one element, show that in three yes or no questions, we can determine the element.

5. ## math

A survey of 9,286 cars on a company’s parking lot. 15% is chrysler, 5% is honda, 19% is toyota and 35% is chevrolet. how many fords are parked on the lot?

6. ## math (unit rate)

please explain how to write the unit rate as a fraction example: 25 feet per second

7. ## Physics

A 850 kg car skidding on an icy highway at 32.5 km/h slides onto some bare pavement. If the coefficient of friction between the tires and the bare pavement is 0.200, what time(s) does it take for the car to stop? HOW do i get the answer!!!!

8. ## algebra

your high school golf team shot rounds of 68, 70, 72, 78, and 84. if par for the course was 71, how many shots was the team over par?

9. ## math

every summer, each student organization at your school sends 2 students to summer camp. the teacher mentor randomly selects the students (pulls from a hat) the club has 10 students among the students is a set of twins. what is the probability the 2 slots

10. ## math 214

Answer each of the following: a. Draw a line l’ and any two points A and B so that AB is parallel to the line. Find the image of l under a translation from A to B. b. Draw a line l and any two points A and B so that AB is not parallel to l. Construct

11. ## MATH

Wheel’s Bicycle shop advertised a bicycle for 15% off for a savings of \$36. The bicycle did not sell so it was offered at a new 20% discount off the sale price. a. What did the bicycle sell for regularly? b. What is the amount of the new discount?

12. ## math213

11. A student reports that it is impossible to mark a product up 150% because 100% of something is all there is. What is your response?

13. ## math213

Suppose you have a friend named Ed. He and his four friends are having ice cream. There are only three flavors available at the ice cream store they are visiting: chocolate, vanilla, and strawberry. One of Ed’s friends, Stacey, eats chocolate

14. ## math213

Suppose you have a friend named Ed. He and his four friends are having ice cream. There are only three flavors available at the ice cream store they are visiting: chocolate, vanilla, and strawberry. One of Ed’s friends, Stacey, eats chocolate

15. ## health

should schools educate teenager about contraception methods or focus only on abstience? please help me, i think yes they should because there are many teenagers who prefer not to adopt abstience. so they should have proper knowledge about contraception.

16. ## algebra

solve for y: 1. 3x+2xy=10 2. 1/3x-3/4y=6

17. ## art

What is known as chroma or intensity?

18. ## math

student claims that the square root of -x equals three has no solution, since the square root of a negative number does not exist. Why is this argument wrong?

19. ## math213

A student reports that it is impossible to mark a product up 150% because 100% of something is all there is. What is your response?

20. ## math213

Let U = {u, n, i, t, e} FIND THE SUBSETS

21. ## math213

Say you have 12 books, but room to display only 7. I will open this to everyone - how many differnt arrangements are there if the order of the books matters (permutation) and how many if order is of no consequence (combination)?

The answer is: They painted humans much smaller than the surrounding objects of nature.

posted on December 6, 2016
2. ## Physics

thats wtong tho, the answer is 4.60s i just don't know how to get that

posted on August 2, 2011
3. ## english

posted on February 24, 2010
4. ## Math

3a-7=65 3a-7+7=65+7 3a=72 3a/3=72/3 a= 24yr Steve 65-24= 41yr Mother

posted on October 27, 2009
5. ## health

thank you so much!!!

posted on January 17, 2009
6. ## health

i am sorry but i still cannot get it. i am so confused. thanks for your help though!!!

posted on January 17, 2009
7. ## math (unit rate)

please explain how to write the unit rate as a fraction example: 25 feet per second

posted on September 16, 2008