# Posts by sam

Total # Posts: 5,361

Chemistry
Consider the titrtation of 25.0mL of 0.0100M Sn2+ by 0.0500M TI3+ in 1 M HCL, using Pt and Saturated Calomel Electrodes to find the endpoint. F=96486.7 Cmol E0 Sn4+/Sn2+ =0.15V E0 TI3+/TI+ = 1.28 Esce = 0.241V R=8.3141 J K Mol (D) calculate E at the following volumes of TI3...

Chemistry
19,103

Chemistry
A solution contains 1.694 mg of CoSO4 (MW 155.0) per mL. Calculate a) The volume of 0.008640 M EDTA needed to titrate a 25.00 ml aliquot of this solution. Step 1. 0.001694g * 25ml * 1/155 g/mol= 0.0002732 mol Step 2. Volume of EDTA needed = 0.0002732 mol/ 0.008640 M = 0.03125 ...

Science
yay Iun again! helped us! thx so much!

Chemistry (Re-post)
A solution contains 1.694 mg of CoSO4 (MW 155.0) per mL. Calculate a) The volume of 0.008640 M EDTA needed to titrate a 25.00 ml aliquot of this solution. So this is my working out for this section, Step 1. Moles of CoSO4 = 0.0001694mg * 25mL * (1mol/155g/mol) 2.732*10^-4. ...

Pre-Calc
The concentration C of a chemical in the bloodstream t hours after injection into muscle tissue is C=3t^2+t/ t^3+50 A. Determine the horizontal asymptote of the function and interpret its meaning in the context of the problem. B. approximate the time when the bloodstream ...

Pre-Calc
A company produces portable cassette players estimates that the profit P (in dollars) for selling a particular model is P=-76x^3+4830x^2-320,000, 0 ≤ x ≤ 50, where x is the advertising expense (in tens of thousands of dollars). Using this model, find the smaller of...

Earth Science
2. Which statement best describes an igneous intrusion? A. Magma explodes to the surface and forms a smooth outer layer of rock. B. Magma is injected into surrounding rock forming an igneous intrusion. C. Magma is exported to an open area and forms iron. D. Igneous intrusions ...

Chemistry
A solution contains 1.694 mg of CoSO4 (MW 155.0) per mL. Calculate a) The volume of 0.008640 M EDTA needed to titrate a 25.00 ml aliquot of this solution. moles CoSO4 = 0.001694mg/ 155 g/mol = 1*10^-6 mol Moles EDTA = 1*10^-6mol/0.025L = 0.000436 mol/L (in 25 mL) This is where...

computer graphics
Write an OpenGL program that allows interactive creation of polygons via mouse input. That is, I click to create new vertices until I like the polygon, then make some indication (double click, right click, press a key, click a button; your choice) that I’m done, and the ...

math
thanks

math
what i am just saying am i right

math
am i right ms sue

math
are u sure i am right

math
ms sue

math
please i neeeed help i think a but i not 100% sure

math

math
what is the ratio of the measurements 6/12=2.5/5 in simplest form a.2:1 b.6:12 c.1:2 d.none of these

math
ok now can u look at the new question i put up please

math
here it is ms sue

math
there is to right traingles and we have to find the missing side the first traingle has 4 on the bottom and 2 as its height the second trangle has a 9 on the bottom and the x as the height which number is x. a.4.5 b.18 c.8 d.2.25 i think a

math
what do u think on the 2 one ms sue

math
im i right on these questions

math
so the first question is a

math
could you help with this one there is to right traingles and we have to find the missing side the first traingle has 4 on the bottom and 2 as its height the second trangle has a 9 on the bottom and the x as the height which number is x. a.4.5 b.18 c.8 d.2.25 i think a

math
i think it is d

math

math
12/6 =5/2.5 a.2:1 b.6:12 c.1:2 d.none of these

ss

ss
could u help me ms sue

ss
do u know this question ms sue math 12/6 =5/2.5 a.2:1 b.6:12 c.1:2 d.none of these

ss
thanks

ss
am i right ms sue

ss
one is d and 2 is a

ss
i think a for the 1 one and b for the second one

ss
there is the 2 question

ss
why is the work session for legislators 40 day? a.legislators were meant to hold other jobs not be career politicians b.state business takes a short time to complete c.it gives legislators time to campaign for re election d.it allows representatives to work closely with ...

ss
thanks so much i am typeing the other question

ss
how is the number of constituents represented by each district decided a.by country boundary b.through geographics boundaries such as rivers c.by political party d.through apportionment

ss
thanks can u help with two more please

ss
i think a and c but i am not sure

ss
here is the new question ms sue

ss
ms. sue here is the question

ss
which of the following are true statements about the qualifications of state legislature? a.senators must be at least 21 years old b.no one without a college degree may be a legislature c.legislatures must be Georgia residents for at least 2 years d.legislatures may serve any ...

art
i posted it as a new question ms sue

art
which of the following are true statements about the qualifications of state legislature? a.senators must be at least 21 years old b.no one without a college degree may be a legislature c.legislatures must be Georgia residents for at least 2 years d.legislatures may serve any ...

art
thanks could u help me with another one please

art
the bicameral organization of the georgia legislature consists of what? a.the house and senate b.the supreme court and the governor c.districts and apportionment d.senior and junior members

art
could you help with one more please

art
thank u i will tell u what i made

art
ms.sue? please i really need help thanks

art

art
i have one more question im so sorry what inference near eastern cultures the best? a. all citizens were excellent writers b.only god worship the near east

art
so the first one is d and the second one is b

art
so it is b

art

art

art
symbol of fortune byzantine god feared creature byzantine diet

art
i have one more question a golden byzantine belt is imprinted with the figure of a hunting falcon what cultural message is the artist hoping to send

art
so it would be d

art
please could u help me ms.sue

art
i really need help i looked in all my notes and everything please thanks

art
in near eastern culture the winged genius often represented in art and artifacts was a blank god a.destructive b.creative c.understanding d.benevolent

astronomy
a light year is a unit of distance most comparable to the distance from earth to what? nearest galaxy nearest star outer solar system

statistics
a statistics instructor collected data on the time it takes the students to complete a test. the test taking time is uniformly distributed within a range of 35 minutes to 55 minutes. determine the standard deviation, what is the probability a particular student will take less ...

calc
Is the matrix 6 0 0 5 a linear combination of the matrices 1 0 0 1 and 1 0 0 0 ? how do you figure this out?

Health
B C C D A

math
20

math
find the simple interest on naira 28 for 25 years at 1 percentage per annum.

MATH
okay thank you ! :)

MATH
i know the answer is 0.08 but how can i isolate for i instead of using the method guess and check 5000 = (800[1-(1+i)^-9])/i

MATH
an annuity has an initial balance of \$5000. annual withdrawals are made in the amount of \$800 for 9 years, at which point the account balance is zero. what annual rate of interest, compounded annually, was earned over the duration of this annuity? PV = \$5000 R = \$800 n = 9 i...

math
an annuity has an initial balance of \$5000. annual withdrawals are made in the amount of \$800 for 9 years, at which point the account balance is zero. what annual rate of interest, compounded annually, was earned over the duration of this annuity? PV = \$5000 R = \$800 n = 9 i...

computer and technology
Iun this is like the hundreth time i see ur answers and they are always right! thx so much.

physics
An Olympic pool has dimensions 50.0 m × 25.0 m × 2.68 m (length × width × depth). The density of the pool water is 1007 kgm-3. Atmospheric pressure (1.00 atm) is acting on the surface of the water. If a child dives down to the bottom of the pool what ...

math
nvm again... sorry

math
joshua won \$250000 in a draw to support the local hospital. he does not need the money for 3 months, so he decides to invest it in an account that pays 8% simple interest annually. calculate the interest paid on joshua's investment at the end of the 3 month period.

Precal
The angle of elevation from a ship in the ocean to the top of a lighthouse is 21deg. If the lighthouse is 200 ft. tall, how far out is the boat? Be sure to show work for partial credit.

Math 1
doing this right now

math
What symbol did people use to define an angle before the angle symbol was invented ? Thank you

math
How do I solve this? -5(4x+1) =15 Thank you

Static Friction..I really Have no Idea
A 0.40 kg block rests on a desk. The coefficient of static friction is 0.20. You push the side of the block but do not have a spring scale to measure the force you use. The block does not move. Which statement is true about the force of static friction? It is no larger than 0....

Chem
A bicycle pump inflates a tire whose volume is 577 mL until the internal pressure is 627 kPa at a temperature of 21.7°C. How many moles of air does the tire contain?

math
Tony jogs 4 2/5 miles from the gym to his home daily. If he takes a water break after 2 1/4 miles,how much further does he have to jog home?

math
Tony jogs 4 2/5 miles from the gym to his home daily. If he takes a water break after 2 1/4 miles, how much father died he have to jog home?

math
lamina in the xy plane is bounded by y=0,x=0 and 2x + y=2 has mass density at (x,y) equal to the distance to the x-axis. find the mass of the lamina. the part that is tripping me up is the mass density

math
A health researcher wanted to know if there was a difference in success rates between three methods of quitting smoking: A, B, and C. She designed a study with 15 participants, 5 in each group, and asked participants to track how many cigarettes they smoked in a 2-week period...

calc
a lamina in the xy plane is bounded by y=0,x=0 and 2x + y=2 has mass density at (x,y) equal to the distance to the x-axis. find the mass of the lamina. the part that is tripping me up is the mass density

calc
A vector parallel to the tangent to the curve x=3t^(4/3) y=2t^3 -1 z= 2/(t^2) at the point (3,-3,2) on the curve is: the answer is <-2,3,2> how do you get this??

calculus
thanks! I got it!! :D

calculus
Given f(x,y,z)=<y,z^2-x,x> use stokes theorem to determine the flux integral curlF dot ds, where S is the graph of z=9 - x^2 - y^2 for z>=0 , oriented by the upward normal. please help!

math
how do you convert centimeter into meteres

math
Sheldon needs to buy 8 gallons of ice cream. Cold Farms price small size \$2.50 for 1 pint large size \$4.50 for 1 quart Cone Dreams price of small size \$4.25 large size \$9.50 for 1 gallon Which size container of Cold Farm ice cream is the better deal? Explain Which size and ...

math
a vector parallel to the line of intersection of the planes. x-2y-z=6 and 3x-y+z=4 the answer is <3,4,-5> so first, I took the cross product of <1,-2,-1> and <3,-1,1> which I think is v. in the equation p0 + tv. << this is the equation for the line of ...

Economics
On keynesian model what variables are used

Economics
How to calculate autonomous consumption

physics
A diffraction grating with 150 slits per centimeter is used to measure the wavelengths emitted by hydrogen gas. At what angles in the fourth-order spectrum would you expect to find the two violet lines of wavelength 434 nm and of wavelength 410 nm? (angles in radians)

Chemistry
A gas occupies 21.0 L at 2.00 atm pressure and 27oC. Calculate its volume at STP.

physics
A stunt man 60kg jumps down straight down at bozs below 10m from a balcony and he's going down at a speed of 50km/h. What is the force exerted on the boxs?

college gen chem
An igneous rock contains a Pb−206/U−238 mass ratio of 0.367. How old is the rock? (U−238 decays into Pb−206 with a half-life of 4.50×109 yr.) I'm not sure how to get started on this :/