Sunday
April 20, 2014

Posts by brina


Total # Posts: 27

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? (R = 0.08205 L at...

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

Physics
thats wtong tho, the answer is 4.60s i just dont know how to get that

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!!!!

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

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?

english
no adj

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 will be filled by the ...

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 l’, the image of...

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?

art
What is known as chroma or intensity?

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?

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?

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 rent was $185. Aft...

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?

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?

math213
Let U = {u, n, i, t, e} FIND THE SUBSETS

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.

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)?

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 exclusively. How many differe...

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 exclusively. How many differe...

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

health
thank you so much!!!

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

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. but i need two reasons ...

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

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

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