Questions and answers by

ALISON

Questions (49)

The wheels are connected BT a belt. One wheel has a radius of 10inches and is rotating 40rpm. If the other wheel has a radius of
1. 1 answer
2. 488 views
1)Convert 1/20 of a circle to both degrees and radians.All I have is 9/180 is what I come up with. 2) what fraction of a circle
1. 2 answers
2. 1,709 views
A rxn has delta H ^0 rxn=-112kj and delta S^0 rxn =354 J/K. at what temp is the change in entropy for the rxn equal to the
1. 3 answers
2. 1,110 views
Write balanced net ionic equAtions.D) zinc chloride and excess ammonia E) cupric phosphate and lots of ammonia A) ammonia and
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2. 893 views
a 250.0ml buffer solution is 0.250M in ascetic acid and 0.250M in sodium acetate.B). What is pH after addition of 0.0050mol of
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2. 854 views
Consider a solution that is 0.022 M in Fe2+ and 0.014 M in Mg+2.A). If potassium carbonate is used to selectively precipitate
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2. 2,608 views
Determine whether of not each compound will be more soluble in acidic soln than in pure water. Explain.A). Hg2Br2 B). Mg(OH)2
1. 2 answers
2. 4,477 views
I have to prove this: (a^3-b^3)= (a-b)(a^2+ab+b^2)How do I use long division to get (a^2+ab+b^2). I'm given..... 1). (a^3-b^3)/
1. 1 answer
2. 327 views
Use long division :(a^3-b^3)/ (a-b)
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2. 363 views
a) Calc. PH of 0.010 M HF and 0.030 M KFe) calc. PH Zn(OH)2 in wAter
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2. 553 views
1.CALCULATE pH of 1.0 L 0.010 M ascetic acid and 0.50 L 0.010 M NaOH.2. Calculate pH of 1.0 L 0.010 M NaOH and 0.500 L 0.010M
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2. 539 views
CALCULATE PH OF THE SOLUTION THAT RESULTS FROM EACH SOLUTIONA) 150.0mL OF 0.25M HF WITH 225.0 mL OF 0.30M NaF Help please, these
1. 1 answer
2. 602 views
A forming acid solution has a pH of 3.25. Which of these substances will raise the pH of the solution upon addition? Explain.A)
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2. 2,461 views
Determine pH of each solution:0.20 M KI i don't know how you know if you use.. K+H2O->KOH + H or... I- +H2O--> HIO +H Im
1. 3 answers
2. 2,297 views
Determine pH of each solution:b) 0.20 M CH3NH3I I did.... CH3NH3^+ +H2O -> CH3NH2 + H3O^+ 0.20 ---------------0--------------0
1. 2 answers
2. 7,560 views
Determine the pH of each solution:(a) 0.10 M NH4Cl can someone show me how to do this one so i have the idea of how to do the
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2. 968 views
Determine the Concentration of OH^-1 and pH of a solution that is 0.140 M F^-1.I did F- +H20 ---> HF + H20 but idk what to solve
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2. 737 views
THE RATE LAW FOR THE REACTION 2NO + 02 = 2NO2 IS FIRST ORDER IN OXYGEN AND SECOND ORDER IN NO. PROPOSE A MECHANISM IN WHICH EACH
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2. 1,291 views
An 8.00 mass % aqueous solution of ammonia has a density of 0.9651g/ml. Calculate the molality, molarity, and mole fraction of
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2. 7,950 views
An industrial chemist is studying smAll organic compounds for their potential use as an auto antifreeze. When 0.243g of a
1. 1 answer
2. 1,021 views
How do i solve this equation over the interval [0degrees,360)cot(theta)+2csc(theta)=5
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2. 967 views
Compare the value you obtained from average bond energies: (260Kj) to the actual standard enthalpy of formation of gaseous
1. 0 answers
2. 578 views
Can someone explain what quadrant this would be in and the domain and range. I have no idea how to graph it.G(x)= -3sin^-1 (2x)
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2. 342 views
Write as an algebraic expression in u.Tan(cos^-1 u)
1. 3 answers
2. 1,133 views
Prove identity.Sec(pi-x)=-sec x
1. 4 answers
2. 7,557 views
Verify the following identity.1) sin(x+y) __________ = tanx+tany cosxcosy 2) Write cos3x in terms of cosx I cannot figure out
1. 0 answers
2. 592 views
1) Find an angle that makes the statement true: costheta =sin(3theta+10degrees)2) Verify this proof: sec(Pie -x)= -secx Can
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2. 555 views
A student placed 12.0grams of glucose in a flask added enough water to dissolve glucose by swirling then added additional water
1. 1 answer
2. 1,116 views
Given the radius of a wheel is 12inches and the angular speed is measured to be 3pie/4 radiant per second, find the linear speed
1. 2 answers
2. 428 views
An automobile windshield washer 10inches long rotates an angle of 60degrres. If the rubber part of the blade only covers the
1. 1 answer
2. 2,063 views
how do i find the exact value of s[pie/2, pie] sin s = radical2/ whole number 2 what is s in radians? how do i figure this out
1. 1 answer
2. 571 views
combustion analysis of a hydrocarbon produced: 33.01 g CO2 and 13.51 g H2OCalculate the empirical formula of the Hydrocarbon. I
1. 2 answers
2. 3,688 views
You carefully weigh out 19.00 of powder and add it to 76.95 of solution. You notice bubbles as a reaction takes place. You then
1. 2 answers
2. 2,952 views
How many kilograms of chlorine are in 24 kg of each of the following chlorofuorocarbons (CFCs)?1) CF2CL2 express answer using
1. 2 answers
2. 6,325 views
find the exact values of the six trig functions of the angle.-750 sin(-750)= cos(-750)= tan(-750)= csc(-750)= sec(-750)=
1. 2 answers
2. 1,602 views
find a value of interval in degreescotalpha=1.3692847 alpha=0.023903 is that correct?
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2. 341 views
find the value of alphacotalpha=1.3692847 is 0.023903 correct?
1. 3 answers
2. 391 views
find reference angle111degrees and -105 does it equal =75? i don't know the first one
1. 1 answer
2. 342 views
suppose theta is in the interval (90,180 degrees) find the sign ofcsc(-theta) is it positive or negative = positive???
1. 1 answer
2. 2,440 views
use a calculator to find the decimal approx. (roud 8decimal places) :sec28°6' does it equal 1.13362379 or 87.99624264 ???
1. 1 answer
2. 373 views
the length of the base of an isosceles triangle is 30.42 inches. each base is 26.54 degrees. find the length of the two equal
1. 1 answer
2. 446 views
find all values of theta in the interval (0,360) that have the given value:sintheta= √2 ______ 2
1. 2 answers
2. 2,968 views
find the exact values of the six trig functions of angle...sin(-315degrees) how do i do this?
1. 1 answer
2. 697 views
assume A= alphausing complementary rule how do I solve for alpha? cos(2A+40) =sin(3A-60) I don't understand how to start the
1. 1 answer
2. 561 views
A rock is 5.0% by mass fayolite(Fe2SiO4), 7.0% by mass forsterite(Mg2SiO4) and the remainder silicon dioxide. What is the mass
1. 1 answer
2. 1,586 views
A rock is 5.0% by mass fayolite(Fe2SiO4), 7.0% by mass forsterite(Mg2SiO4) and the remainder silicon dioxide. What is the mass
1. 1 answer
2. 560 views
The mass of the earth is known to be about 5.98 X10^24kg assume that it is approx. spherical with an average diameter of
1. 3 answers
2. 1,537 views
A car starts from rest and accelerates for 6.1 swith an acceleration of 3.1 m/s2. How far does it travel? Answer in units of m.
1. 1 answer
2. 606 views
dans cette figure on compte 8 triangle.Ã‰cris le nom de chacun d'eux.
1. 1 answer
2. 338 views