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Tony335

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0
answers
How do I find the equation of the plane containing (-3,6,5) and normal to the line of intersection of planes 3x+5y+4z+13=0 and 4x-2y+7z-8=0?
0
answers
Sodium carbonate hydrate is 14.5% water.What is the formula of the hydrate? I know answer is 1:10 but I keep getting 1:1 how do I do this?
0
answers
How do I make a Titration graph with the following information:Titration of 100 mL of 0.1 M NaOH with 0.1 M HClGraph pH vs Volume of 0.100 M HCl addedmL of HCl added (on the x-axis)010909999.9100100.1101110190200
chemistry
1
answer
How many electrons are transferred in the reaction between magnesium metal and oxygen? Give your answer as a ratio of moles of electrons to moles of magnesium.
1
answer
Write the equation of a line that is tangent to the circle at the point (3,-4). 
0
answers
Find the distance from the point (8,3) to the circle x^2+y^2=4 to the nearest tenth of a unit?
1
answer
Ship C sights ship D at a bearing of 123 degree. What is the bearing of D from C?
0
answers
The procedures of the lab is on the following website:http://virtualinquiry.wikispaces.com/file/view/Behavior+of+Gases+Molar+Mass+of+a+Vapor.pdf The results of the lab are: Mass of flask+cap+rubber band=74.482g Temperature of boiling water=108.9 Barometric pressure=30.11 in Mass of flask+rubber band+cap+condensed vapor=74.694g Mass of condensed liquid=0.212g Volume of flask=146.5mL Molar mass of vapor=43.6g The post lab question i'm having trouble with is: Suppose the liquid in the flask has a vapor pressure of 100.mm Hg at room temperature.  a.What fraction of the air has been displaced in the final weighting? b. How many mL  of air have been lost in the final weighing? c. How much would this air weigh (assume moleuclar of aire is 29 g/mol)? d. Recalculate the molecular mass of your liquid after adding this mass of lost air. 
AP Chemistry
0
answers
Using  1 knot=1 nautical mile per hour=6080 feet per hour. Convert 193.12 yards/min to knots. 
trigonometry
1
answer
would dna from a single cell be visible to the naked eye. Please explain your answer
0
answers
Vapors are likely to be non-ideal near condensation temperatures. Would you expect such behavior to make your molecular mass to high or too low? Explain
chemistry
0
answers
What type of cells are wheat germ cells? (think: prokaryotic/eukaryotic? Plant/animal?)
0
answers
How do i solve for x in 2cos(x)^2-cos(x)=2-sec(x)?
0
answers
How do I solve this Trigonometry equation for the values of x? 2cos(x)^2-cos(x)=2-sec(x)?
trigonometry
0
answers
How do I solve for x in 3coscotx+7=5csc(x)?
trigonometry
0
answers
write a net ionic equation for the precipitation reaction between calcium ions and oxalate ions in solution to form calcium oxalate monohydrate precipitate. 
chemistry
1
answer
what do you have to know before doing algorithms
1
answer
segment XY is the diameter of a circle. Point Z is placed on the circle such that the length of line XZ is 6 and the length of line ZY is 8. What is the area of the circle?
SAT
3
answers
if you don't take an AP class and you take the AP test can colleges still see it even if you already applied for two APs already?
0
answers
A sector of a circle has a perimeter of 7 cm and and area of 3 cm^2. Find all possible radii?
1
answer
The hydrate of ionic compound X has a molar mass of 124.1 g/mol and is 43.56% water. What is the molar mass of X?
0
answers
How would the experimentally determined heat of formation of MgO been affected if the Mg ribbon were significantly tarnished? Experimentall determined value of Mgo is -301.83 kJ/mol
AP Chemistry
0
answers
the direction in which the reaction spontaneously proceeds changes as the temperature is increased above a specific temperature. Can some explain why.
chemistry
0
answers
Wow really we are going to have commercials? 
1
answer
The height and diameter of a cylinder are equal. Express the volume of the cylinder as a function of its height,h.
precalculus
0
answers
What is the heat of formation for Magnesium Chloride in the AQUEOUS from? I tried to figure it out myself and got -801.2 kJ per mole but im not sure
AP Chemistry
0
answers
How do I calculate the experimental value for change in enthalpy for Mg(s)+2HCl(aq)-->MgCl2+H2(g)? The question also tells me to include the mass of Mg with the mass of HCl solution in the calculation of q. (this is form an experiment). The mass of Mg is .481 grams and the volume of HCl is 99.9 mL or 99.9 grams. The initial temp is 19.2 centigrade and the final is 40.0 cenitgrade. I found the Enthalpy to be -307.2 kJ but im not sure if it is right
AP Chemistry
0
answers
In The Federalist No. 10 James Madison argues that having less representatives is better than having more. Why? 
US History
2
answers
how do I solve 3^x+1 = 5^x. (THis is logarithms)
1
answer
Gallium (Ga) consists of two naturally occuring isotopes with masses of 68.926 and 70.925 amu. (a) how many protons and neutrons are in the nucleaus of each isotope? (b) The average atomic mass of Ga is 69.72amu. calculate the abundance of each isotope.
chemistry
0
answers
Gallium (Ga) consists of two naturally occuring isotopes with masses of 68.926 and 70.925 amu. (a) how many protons and neutrons are in the nucleaus of each isotope? (b) The average atomic mass of Ga is 69.72amu. calculate the abundance of each isotope.
0
answers
combustion of 2.78 mg of ethyl butyrate ( contains carbon, oxygen and hydrogen) produces 6.32 mg of CO2 and 2.58 mg of H2O. Find the empirical formulaof the compund.
chemistry
0
answers
How do i use the molar mass of silver and oxygen to calculate the number of moles of each product? Theoretically I should get 2 moles of silver to 1 mole of oxygen. I got .431 grams of silver and .074 grams of oxygen. But when i find the mole ratio I get 1:1
1
answer
Suppose you have to use exactly 200 meters of fencing to make either one square enclosure or two separate square enclosures of any size you wish. What plan gives you the least area? What plan gives you the greatest area?
0
answers
how do i find the first three terms of the arithmetic sequence in which the 17th term is 27 and the 41st term is 63
1
answer
How do i find the derivative of y=sinx^3*tan(4x)?
calculus
0
answers
How do I find the derivative of Cot(x)/(1+Cot(x))?
calculus
1
answer
How do i find the limit of (5x^3+8x^2)/(3x^4-16x^2) as x approaches 0 algebraically.
calculus
0
answers
How come when I type in the numbers in 1:41 I get the positive number of Y
onesided limits
1
answer
why would you use the horizontal line test and vertical line test? y=x^2 is not one to one in the horizontal line test but it is one to one using the vertical line test?
0
answers
How do I find the equation of the plane containing (2,5,8), (-2,4,1) and (-4,7,3)?
2
answers
How do I write -i into polar form?
0
answers
Let vector a equal vector 2i+vector 5j and vector b equal vector 7i - vector 3j. Find x, if vector a+vectorxb has an i component of 0
0
answers
Find z1^2, if z1=4cis238° and find z2^3 if z2=4cis96°? the
1
answer
How come when i type in 1/tan 90 i get undefined but when i look at my textbook it says that it equals zero?
1
answer
Couldn't he have used the distance formula for problem 1?
0
answers
How do i find the polar equation of a parabola with focus at the pole directrix parallel to the polar axis 7 units above the pole?
1
answer
If 5x^2+3y^2-32=0 and a  line intersects it at (1,3). What is the equation of that line? That line is suppose to be tangent. I don't understand how to "set the discriminant to zero"
0
answers
How do I find the particular equation of the conic section with focus at (0,0) and directrix y=3 and eccentricity 2?
0
answers
How do you graph 3x^2+7y^2=71
0
answers
Find the particular equation with focus at origin with directrix y=3 and eccentricity of 2. I got x^2-3y^2+24y-36=0 But my book says x^2+3y^2+16y-16=0
1
answer
How do you find the particular equation of the conic: Ellipse with vertices (4-2) and (4,8) and a minor axis 6.
1
answer
Find the particular equation with focus at origin with directrix y=3 and eccentricity of 2. I got x^2-3y^2+24y-36=0 But my book says 3y^2+16y-16=0
1
answer
When you have equations such as: 2x^2+5y^2=98, how would you graph it if the numbers don't go into each other evenly?
1
answer
How do you graph 3x^2+7y^2=71
1
answer
How do you graph 3x^2+7y^2=71
1
answer
How do you solve for y in terms of x in the equation x^2/25-y^2/9=1
1
answer
how come when i type in 1/tan 90 i get undefined on my ti-84
0
answers
Can someone write the questions out? 
0
answers
What does long dashes mean?
1
answer
How do you find the slope of an asymptote of a hyperbola?
1
answer
The probability of being stopped at first light is .4 and the probability of being stopped at the second one is .7. What is the probability of being stopped at exactly one of the lights?
1
answer
calculate the energy required to change 1 mole of ice at -10 degree celseuis to water at 15 degrees celseuis.
0
answers
how can molecules with dipoles condense to form liquids or solids?
1
answer
A 0.250-mole sample of oxygen gas (O2) occupies 5.60 L at STP and 0.250 mole of ozone gas (O3) occupies _____ L.
3
answers
Suppose two 200 L tanks are to be filled separately with the gases helium and hydrogen. What mass of each gas is needed to produce a pressure of 135 atm in its respective tank at 24 degrees celsius
1
answer
If the pressure exerted on th gas in a weather balloon decreases from 1 .01 atm to .562 atm as it rises by what factor will the volume of the gas in the balloon increase as it rises?
1
answer
Can someone explain to me the even and odd functions for trigonometry?
0
answers
Prove: Sin(x)=2Cot(x)Sin^2(x). 2cot is the same as cot+cot right? then wat is cot (2x)? Someone in my class made me confused.
2
answers
How find the exact value of cos(2Arctan (4/3))?
0
answers
prove 1+sin (x)/1-sin (x) = 2 sec^2 (x)+2sec (x) tan(x)
1
answer
prove sec (x)-cos (x)/ cos (x) = Tan^2 (x)
1
answer
prove sin(x) / csc(x) +cos(x)/sec(x)= 1.
1
answer
How do I prove Sin (x)/Cos(x)+Cos(x)/Sin(x)=Csc(x)/Cos(x)? I did this is it correct? Sin^2(x)+Cos^2(x)/sin(x)cos(x) then 1/sin(x)cos(x). which then equals...
1
answer
Is Sec^2 (x) - Tan^2 (x) a special identity? And does it equal 1.
2
answers
Prove sec^2A+tan^2A*sec^2A=sec^4.
1
answer
Tom, Jim and Harry each draw two cards from a normal deck of 52 cards and don't replace them. Tom goes first. a) In how many orders could tom draw his first two cards? b) In how many orders could...
1
answer
At 8:16, instead of : she goofs off least and studies hardest, could you change it to she goofs of THE least and studies THE hardest?
2
answers
A 5.0 g sample of a metal is heated to 80.0oC and placed in a 100. g sample of water. The temperature of the water rises from 20.0 oC to 20.3 oC. Which of these is most likely to be the metal?
0
answers
given S+3/2O2--->SO3 delta H=-395.2kJand 2SO2+O2-->2SO# delta H=-198.2calculate delta H for s+O2--->SO2
1
answer
how many distinguishable letter arrangements can be made from the letters in the word STATISTICS? what is the probability that a random permutation chosen will end in a consonant?
3
answers
4 coins are tossed. what is the probability that exactly two come up heads and two come up tails?
1
answer
What are some key words to differentaiate between permutations and combinations.
1
answer
how do i simplify (n+3)!/(n+1)!
0
answers
if repetition is not allowed then how many numbers of three or fewer digits can be formed.
1
answer
aluminum reacts with sulfur to form aluminum sulfide. 1.18 mol of al and 2.25 mol of sulfur are combined. how many moles of excess reactants remain unreacted? I found out al is the limiting reactant 
0
answers
The traditional method of analyzing the amount of chloride ions present in a sample was to dissolve the sample in water and then add a solution of silver nitrate. Ag(aq)+Cl(aq)----> AgCl(s)Suppose
1
answer
2H2+ O2---->2H2Ocalculate the mass in grams of water vapor produced when 56.0 grams or pure hydrogen gas is burned
1
answer
How can the identity of the limiting reactant, and the amount of product that theoretically can be produced, be determined when given the amounts of each reactant in mole or grams.
2
answers
Steve204 is really smart and helpful!!! Thank you Steve204 I appreciate all the help you provided me.
1
answer
how do i find the area of a segment of a circle if given chord of length 8 at a distance of 4 from center
0
answers
what is algorithms and what section of math is it in?
1
answer
how do i solve 10^7-x= 5^x+1
1
answer
how do i solve 3^x+1=5^x
1
answer
Assume whenever you wash jeans u lose 4% of color they had just before they were washed. What is the common ratio. my teacher told me it was .96 but i dont get it.
1
answer
I am learning about communist Russia in the early 19th century and I still don't really understand what communism is and why it failed in Russia. Could someone help me?
1
answer
how do i simplify (n-1)!/n!
1
answer
if someone starts with 36 inch steps and each step after is 90 percent as long as the one before. what type of sequence is this?
1
answer
If a person starts with a 12 inch step and increases their stride by 1/2 inch each step. And stops at 21th step what kind of sequence is this?
0
answers
assume whenever you wash a pair of jeans you lose 4% of the color they had just before they were washed. What is the common ratio? In other words find the formula? I been trying this for ever
0
answers
IF spectator ions are not part of the reaction then why are they present in the solution?
0
answers
if a substance is insoluble does this mean it is a non-electrolyte? If a substance is a non-electrolyte does this mean it is insoluble.
0
answers
if a substance is insoluble does this mean it is a non-electrolyte? If a substance is a non-electrolyte does this mean it is insoluble.
5
answers
If I buy the test prep how many months does the 99 dollars cover?
2
answers
I have a speech to do and I'm not sure what my topic should be? Could anyone give me some recommendations.
0
answers
On the second example with two possible answer how come carbon monoxide is an answer. The equation isn't balanced and at first the oxygen atom is missing
0
answers
1. If a substance is insoluble, does this mean it is a non-electrolyte? If a substance is a non-electrolyte does this mean it is insoluble? Explain please
1
answer
In 1803 unites states purchased about 500,000,000 acres of land from France for about 15,000,000. If France invested the 15 million dollars compounded annually at a 7% how much do they have in 2011?
1
answer
how many moles of tungsten are in 4.8 time 10 raised to the 25th. The answer is 8.0 times 10 raised to the first i don understand why thought.
1
answer
what is a chemical principle?
1
answer
The hydrate of ionic compound X has a molar mass of 124.1 g/mol and is 43.56% water. What is the molar mass of X?
0
answers
Plaster consists of the hydrate of calcium sulfate. The hydrate of calcium sulfate contains two molecules of water per formula unit of calcium sulfate.What is the empirical formula of the hydrate?
0
answers
What is a chemical principle or what is the chemical principle of the Hindenburg (the helium blimp that caught on fire)?
1
answer
how do i add 1 and R/1
1
answer
how do I write the formula for this word problem: A card was bought for $1 and increased in value by a factor of 10 every 9 years. If the card is now worth $32 dollars then how long ago did she buy it
2
answers
what is the formula for the following sequence?  -6,-2,0,1,3/2. so is it arithmetic or geometric.
1
answer
what is the formula for the following sequence, -1, 2/3,7/3,4,17/3.
1
answer
Nitrous oxide and water vapor can be produced in small amounts in the labratory by careful heating of ammonium nitrate. How do i write the unbalanced equation for this reaction?
1
answer
if you weren't given the rate (r), how would you solve it
1
answer
how do you find the number of moles of sulfur atoms present in the following sample: 2.01 grams of sodium sulfate or NaSO4
1
answer
how do you find the inverse of g(x)=6^.5X
0
answers
how do you find the molar mass of an empirical formula if it says the number is between 89 and 91?
0
answers
.4691 grams of a sample contained .1929 grams of carbon, .01079 grams of hydrogen, .08566 frams of oxygen and .1898 grams of chlorine. determine the empirical formula? how do i do this
0
answers
How to you find the numbers of moles of sulfur atoms in 2.01 grams of sodium sulfate if that is the only given information?
1
answer
Can someone please explain all the steps to solving the problem, if a metallic oxide is 40.1% oxygen and the metal has a 4+ charge. what is the metal?
3
answers
how does e raised to the natural log of x  equal x
2
answers
can someone explain me how the multiply add theorem for logarithm works?
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