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Posts by lo

Total # Posts: 100

science
The following replicate values were reported for the concentration of magnesium chloride, MgCl2, in mol/L. What value should be reported as the mean concentration of the chloride ion, Cl, converted to ppm? (You may use the simplified definition of ppm.)0.00141, 0.00138...

chemistry
Difference between a halogen and a halide? Explain using chemical formulas.

chemistry
Write the balanced chemical equation for the dissolution of magnesium sulphate

chemistry
Arrange the following groups of atoms in order of their increasing atomic radius: K,Rb,F,B,Be I think its F<B<Be<K<Rb someone can you correct me pls

chemistry
How many degenerate orbitals have the following name? 2s 3p 5d 4p 5s I don't get this question

chemistry
yes thank you and that's what I mean for iii typo error

chemistry
Which of the following sets of quantum numbers are not allowed. For each incorrect set, state why it is incorrect. For each correct set, name the atomic orbital. i. n=4, l=3, ml =2, ms =-1/2 ii. n=2, l=1, ml =-1, ms =-1 iii. n=5, l=-4, ml =2, ms =+1/2 can you guys help me my ...

chemistry
This statement is writing in my textbook can someone please explain to me what it mean: Determining the position of electrons, eliminates their wave properties.

chemistry
The amount of energy required to remove an electron from the surface of Hg is 7.22x10^-19 J. What is the threshold frequency of mercury? I got 1.09*10^15 hz is it right?

CHEM LAB
Why must you weigh the beaker containing salt and water before dissolving the salt? Why would it be incorrect/inaccurate to obtain the total mass after dissolving the salt? Explain your answer. (We had to do to create different nacl salt concentration )

Physics
no you're not gonna fail with a 0% as your final you will get exactly 60 % calculation: (67.90)+(0.10)=60%

Calculus
Hm

Chemistry
A scientist wants to make a solution of tribasic sodium phosphate, Na3PO4, for a laboratory experiment. How many grams of Na3PO4 will be needed to produce 550 mL of a solution that has a concentration of Na+ ions of 0.600 M ?

math
A box full of packets of biscuits each weighing 200 g weighs 12 1/2 kg.The empty box weighs 2 kg 500 g. calculate the number of packets of biscuits in the box.

Civics
B!!

statistics
A student government representative at a local university claims that 60% of all the undergraduate students favor a move to Division I in college football. A simple random sample of 250 undergraduate students is selected. What is the probability that the sample proportion ...

physics
A student in the laboratory connects a 13 Ω resistor, a 24 Ω resistor, and a 41 Ω resistor in parallel and then connects the arrangement to a 43 V dc source. What is the current? What is the power? (in watts)

science
A quantity of steam (750 g) at 122°C is condensed, and the resulting water is frozen into ice at 0°C. How much heat was removed?

physics
A quantity of steam (750 g) at 122°C is condensed, and the resulting water is frozen into ice at 0°C. How much heat was removed?

chemistry
Determine the number of bonding electrons and the number of nonbonding electrons in the structure of SeCl2 and SiO2.

Chemistry
1.Calculate the density of oxygen, O2, under each of the following conditions: STP 1.00 atm and 20.0 ∘C 2.To identify a diatomic gas (X2), a researcher carried out the following experiment: She weighed an empty 4.3-L bulb, then filled it with the gas at 1.90atm and 20.0...

algebra
. A professor has RM 15000 to invest for one year, some are 8% and the rest are at 7% annual interest. If she will earn RM 1100 from these investments, how much did she invest at each rate?

MHS
asa

phil208
Active and Passive Euthanasia by: James Rachels

phil208
Glaucon states that most people think that justice (Points : 1) Is only praised by good people. Is the lesser of two evils. Is the rule of the majority. Is the rule of the powerful.

Algebra 2
The volumes of two spheres differ by 336pi cubic meters and the lengths of their radii differ by 6 meters. Find the length of the radius of the smaller sphere. (Round your answer to the nearest hundredth)

phi208 Ethics and moral reasoning
What are some relativistic beliefs that you have or that you find in society? What are those ethical beliefs and how do people justify those beliefs? Using the articles from Mary Midgley and James Rachels, present a critique of those relativistic beliefs. What reasons do you ...

science
production. Describe at least two alternatives to oil that are currently available and discuss the barriers that keep these alternatives from replacing oil as our primary means of energy? Additionally, utilizing at least two scholarly or reputable resources and your textbook, ...

Math
A sofa regularly sells for $510. The sale price is $423.30. Find the percent decrease of the sale price from the regular price.

algebra
A salesperson has January sales of $20,000 (1, $20,000) and April sales of $80,000 (4, $80,000). What is the rate of change?

Grammar Please Help!!
.)The Grand Canyon is one of the natural wonders of the world. Since 1908, it has been a U.S. national monument

Math
12

Business math
To help consumers in this tough economic climate, Pikes Peak Harley-Davidson offered to finance a new motorcycle for qualifying customers at 13% down, 7.50% interest for 48 months during July 2009. Rich Martinez was interested in calculating what his monthly payment would be ...

mathematics
1/3+2/3=1. You simply add the numbers on the top of the fraction. 1+5/3= 2and2/3 Since 3/3 = 1, 5/3 = 1+2/3 So 1+1+2/3=2and2/3

math
Below is the rule for calculating the velocity of a falling object. Use this rule to calculate the rate, expressed in feet per second, that a piano, dropped 3 seconds ago, is falling. V(t) = 32t A. 192 feet per second B. 288 feet per second C. 96 feet per second D. 3 feet per ...

Physica
what is the pressure dut to 30 m heght water column

Physica
What is the value of the focal length fn2 of a convergent lens with index of refraction ( n2 =1.5) if it was fn1 =5cm for an index of refraction n1 = 1.4 .

physics
.33333

Chemistry
Kb=1.86 Kf=.52

trig
right triangle has an acute angle of 24.8 and an adjacent length of 145 what is the side opposite of the acute angle

Physics
This problem compares some energy properties of two motor vehicles: For efficient car, use drag coefficient of .21 and a cross sectional area of 1.5m^2. For a light truck, use drag coefficient of .75 and a cross sectional area of 2.7m^2. Use 1.25 kg/m^3 for the density of air...

physics : HELP PLEASE
first part the answer is 30 m. d= rt so distance = rate (3) times the time (10) so the distance is 30

chem
what is not a function of specific rotation temperature concentration wavelength

mirror images
Can someone please explain what mirror images to me in simple terms.

College Algebra
9.375

english
I need help writting a discussion on why the follow paragraph is effective including variety and rhythum of the author's writing:Individuals can be denied credit for a number of reasons. Individuals who are near limits on existing cards, have too much outstanding debt or ...

algebra
mike wants to make meatloaf and the recipe calls for six pounds of meat if he uses a 3 to 1 ratio of beef to pork how much pork will he use

chemistry
The enthalpy of combustion of carbon to carbon dioxide is -394 kJ according to the equation: C (s) + O2 (g) --> CO2 (g) How many kJ of heat are released when 24.0 g of carbon are burned in an excess of oxygen

8th grade math
A group of 1,500 high school students were asked to fill out a questionnaire about their future career choices. The circle graph represents the results of the questionnaire. Use the circle graph to answer the question. Doctor: 20% How many students chose doctor as their career...

pie graph // math
Jorge and his family went to an amusement park over spring break. They spent $500.00. The pie graph shows how the $500.00 was divided over the trip. Use the pie graph to answer the question. Hotel : 2/5 How much money did Jorge and his family spend on a hotel...

8th grade math
A box contains 6 red balls, 4 white balls, and 5 green balls. If three balls are drawn in succession without being replaced, what is the probability that they are drawn in the order red, white, green? A x 8/225 B x 4/91 C x 12/445 D x 1/225...

Math
A consumer buys n light bulbs, each of which has a lifetime that has a mean of 800 hours, a standard deviation of 100 hours, and a normal distribution. A light bulb is replaced by another as soon as it burns out. Assuming independence of the lifetimes, find the smallest n so ...

math
State whether the events described are independent or dependent and determine the probability: A card is pulled from a well shuffled deck of standard playing cards and is not put back in the deck. A second card is drawn from the deck. What is the probability that a spade was ...

math
A card is pulled from a well shuffled deck of standard playing cards and then put back in the deck. A second draw is made from the deck. What is the probability that an ace was drawn both times

math
A spinner is divided into 5 equal sections numbered 1, 2, 3, 4, and 5. If the spinner is spun and a coin is tossed, what is the probability of getting a tail on the coin and an odd number on the spinner

mat
Marcus flips a coin and tosses a six-sided die with the sides numbered 1 through 6. What is the probability that he gets a head on the coin and a number divisible by 3 on the die

math
A six-sided die with sides numbered 1 through 6 is tossed twice. What is the probability of getting a number larger than 4 on both throws

math
A box contains 6 red balls, 4 white balls, and 5 green balls. If three balls are drawn in succession without being replaced, what is the probability that they are drawn in the order red, white, green?

math
IF YOU NOT GOING TO HELP THEN DON'T ANSWER AT ALL CARO !!!

math
State whether the events described are independent or dependent and determine the probability: A bag contains 7 red checkers and 11 black checkers. One checker is drawn and replaced. Then a second checker is drawn. What is the probability that a red checker was drawn both times?

math
State whether the events described are independent or dependent and determine the probability: A card is pulled from a well shuffled deck of standard playing cards and is not put back in the deck. A second card is drawn from the deck. What is the probability that a spade was ...

science
yea i really don't know so some1 plz answer! :( i hate homework

science
what would happen if a large amt of light colored dust was added to the atmosphere? dark black soot from fire?

math
Express y=[4x-x^3]/[3x^2+2)^2 as a product and then differentiate. Simplify your answer using positive exponents. Help Please! ty

math
A right triangle has a hypotenuse equal to 25 m and one leg equal to 17 m. What is the approximate value of the second leg of the triangle?

math
A triangle has sides of lengths 48 feet, 55 feet, and 74 feet. Which statement is true concerning this triangle?

math
Two planes depart from the same airport at the same time. One hour later one of the planes is 480 miles due north of the airport and the other plane is 550 miles due east of the airport. At that time, what is the distance between the two planes?

calc
Can someone please show me how to find the integral of sin squared x?

CHEM 11
I am really stuck with this... what mass of oxygen is contained in 10.5 umol of chromium(III)nitrate hexahydrate? Can't understand how to convert the micro-moles especially!

MTH 157
The 99 employees in a factoryearn a salary of $35,000 per year, while the CEO makes $266,000 annually. What are the mean, median salaries for all 100 people? Is the mean or median the more appropriate measure of "center" in this case? Explain.

MTH 157
A box contains 3 blue cards numbered 1 through 3, and 4 green cards numbered 1 through 4. List the sample space of picking a blue card followed be a green card.

Math
ihu

math
Teena's favorite jeans were marked down from $30 to $25. What was the percent discount on the jeans?

physics
A small turbo-prop commuter airplane, starting from rest on a Tallahassee airport runway, accelerates for 21.0 s before taking off. Its speed at takeoff is 56.0 m/s (125 mi/hr). Calculate the acceleration of the plane, assuming it remains constant. Express your answer in g'...

chemistry
The volume of an ideal gas is 2.06L at standard temperature and pressure. Calculate the volume at 1.75atm and 27oC

Physics-Linear momentum
kl

Statistics
can someone check this answer i got. i got 37/250. two branches are republican and democrat. from republican two branches are favor and dislike. probability of being republican 40/100 and probability of favoring issue is 70/100 and disliking is 30/100 from democrat two ...

Statistics
How do you make a tree diagram for this? (and in general) 1) of the voters in a certain city, 40% are republicans and 60% are democrats. among the republicans, 70% are in favor of a particular bond issue whereas 80% of the democrats favor the issue. if a voter is selected at ...

chemistry
a. 66

Physical Science
yeah that didn't help but thanks

Physical Science
A weight lifter cleans and jerks 150kg, lifting it 2m above the ground in 1.5s. What is his power output?

Physical Science
If you do 600J of work hoisting a 20kg bale of hay, to what height did you lift

Physics
chuck norris

physics - trans. line
A high-voltage transmission line with a resistance of 0.30 /km carries a current of 1040 A. The line is at a potential of 680 kV at the power station and carries the current to a city located 159 km from the station. (a) What is the power loss due to resistance in the line? b...

physics - charge
A 80.0 g block carrying a charge Q = 33.0 µC is connected to a spring for which k = 74.0 N/m. The block lies on a frictionless, horizontal surface and is immersed in a uniform electric field of magnitude E = 4.84 104 N/C directed away from the spring and block. The block...

physics - capacitors
Capacitors C1 = 5.0 µF and C2 = 2.0 µF are charged as a parallel combination across a 150 V battery. The capacitors are disconnected from the battery and from each other. They are then connected positive plate to negative plate and negative plate to positive plate...

psychology
Summarize the multi-factorial model and how it relates to the diagnosis of illnesses. • Select two health problems discussed in the text. • Explain what role psychology has played in understanding and managing these two health problems.

algebra
factor by grouping x^3-5x^2+5x-25

CRT 205
is the following argument valid, sound or stong and what is the reason/rationale: Too many seniors, disabled veterans, and families with children are paying far too much of their incomes for housing. Proposition 168 will help clear the way for affordable housing construction ...

Critical Thinking
Is the following passage valid/sound/strong arguments and what is the reasoning? If you want to see the best version of the three muskateers, try the 1948 version. Lana Turner is luscious, Vincent Price is dastardly; Angela Lansbury is exquisitely regal; and nobody ever has or...

math
solve. x(1 +2x) = (2x - 1)(x - 2)

Riddle
;' ]

english
chaucer sounds like a modern day buisnessman. explain why

math 115 wk.7
its 9 kid. read your book. this is basic math.

math
dividing moniomials. 2 to the 2nd/2to the -3

Chemistry
89

math
A road perpendicular to a highway leads to a farmhouse located 8 mile away.An automobile travels past the farmhouse at a speed of 80 mph. How fast is the distance between the automobile and the farmhouse increasing when the automobile is 7 miles past the intersection of the ...

Stressed syllables
i don't know much about syllables, but when i find out i would love to help! i will try and find out soon hope u find out Lo xxxxxxxxxxxxxxxxxxxxxxxxxxx i will text back again with an answer!

Riddle
hahahahhahah

Economics
Reference: F11061 Refer to the above diagrams, in which AD1 and AS1 are the "before" curves and AD2 and AS2 are the "after" curves. A recession is depicted by:

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