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william

Questions (172)

Let U be a set. show that is a unique s that is an element of the power set of U so that S△A=U for all A that is an element of
1. 1 answer
2. 77 views
claim: if n is even then n^2+3 is oddproof: suppose n is within natural numbers is even then, by definition of even numbers,
1. 3 answers
2. 71 views
is my proof correct?Suppose that x and y are real numbers and x + 2y ≤ 4. Show that if x > 2 then y < 1 suppose x + 2y ≤ 4
1. 3 answers
2. 83 views
Recall that the Fibonacci sequence {fn} is defined as follows: f1 = f2 = 1, andFn = fn−2 + fn−1, for n ≥ 3. to determine
1. 4 answers
2. 150 views
in the integral (tan^15(x)sec^8(x)dxa substitution of u=sec^2(x) and the result is written as the integral f(u)du find f(u) I've
1. 6 answers
2. 146 views
The integral (x^3sqrt(9^2-x^2)) can be transformed using a substitution to 59049 integral cos^4(x) -cos^2(x)i've figured out how
1. 2 answers
2. 139 views
lim as x approached infinity from the right side((x^3-5x^2)^(1/3)-x)
1. 2 answers
2. 64 views
the top and bottom margins of a poster are 6cm and the side margins are each 2 cm. if the area of printed material on the poster
1. 2 answers
2. 171 views
find the values of a and b that make f continuous at all points in its domain.f(x)= {bcos(pi(x))-2 x≤ 1 3x^2-ax+b 1<x<2 2x-4a
1. 2 answers
2. 93 views
evaluate the limitlim x ➟ ꝏ (5x^2+3x)/(7x^4+2x^2+10)^1/2 how would I got about solving this? you can factor out an x on top
1. 4 answers
2. 145 views
Evaluate the following limits, making sure to justify your calculations as much as possible:as x approached 3-,3+,3
1. 2 answers
2. 77 views
Let f(x)=cot(x). Determine the points on the graph of f for 0<x<2π where the tangent line(s) is (are) parallel to the line
1. 4 answers
2. 253 views
assume that f(x) is everywhere continuous and it is given to you that f(2)=-7 andlim (f(x)+7)/(x-2)=8 x➟ 2 it follows that y =
1. 4 answers
2. 154 views
question. Let (a, b) denote the midpoint of the line segment between P = (3, 4) andQ = (11, 6). Find the values of a and b.
1. 1 answer
2. 138 views
I dont really understand how I can solve for x in this equationlog5^x=-2
1. 1 answer
2. 73 views
two balls are thrown upwards from the same spot 1.15 seconds apart. the first ball had an initial velocity of 15. 0 m/s and the
1. 1 answer
2. 153 views
A particle moves along a vertical line. Its position in m at time t in s is given by s(t) = t3 – 9t2 + 24.a) Determine the
1. 1 answer
2. 313 views
due to illness, vanessa missed 15 days of school of the 48 school days in term 1. what percentage of classes did vanessa attend
1. 4 answers
2. 510 views
which region of minnesota has the most fertile farmlandA.central lowlands B.driftless area C.dissected till plains D.superier
1. 3 answers
2. 558 views
Find the supplement of <PQR if <Q = 57O
1. 1 answer
2. 164 views
in how many ways could the digits in the number 458 978 be arranged if the prime digits must remain in the original positioni
1. 5 answers
2. 1,624 views
a game has players roll either one or two standard dice. which is the total number of possible different outcomes
1. 4 answers
2. 1,369 views
Create a second Raptor program that has the user enter two values. The program calculates the sum, difference, and result of
1. 3 answers
2. 819 views
To obtain 80 mol of sodium hydroxide (NaOH) from the electrolysis of an aqueous solution of NaCl, where70% of its mass is water,
1. 1 answer
2. 261 views
We have a 1.5 mo/L NaOH solution, what initial volume should we add from this base in a 200 mL volumetric balloon in order to
1. 1 answer
2. 205 views
hello! I seem to be having some problem with the start of my grade 12 physics course in which my grade 11 course was cut short
1. 1 answer
2. 254 views
What is the volume of a 2.5 mol/L Pb (NO3)2 solution that contains 0.05 mol pb2+?
1. 1 answer
2. 249 views
Are the ratios 16:7 and 2:1 equivalent?
1. 4 answers
2. 690 views
determin whether each equation has one solution no solution or infinite solutions 9 x + 2 equals -4 (x + 6)
1. 2 answers
2. 576 views
put in order from least to greatest -40,20,0,-156,-13,6
1. 3 answers
2. 242 views
Triangle ABC has vertices at A (-2, 4), B (-5, 4), and C (-1, 6) and is translated. The image of vertex B is (-8, 4). What are
1. 1 answer
2. 453 views
A car traveling at 34.8 m/s approaches the turnoff for a restaurant. If the driver slams on the brakes with an acceleration of
1. 1 answer
2. 337 views
a technician went to the laboratory to prepare a solution of 250.0 mL of calcium carbonate (Na2CO3). It was weighed on the
1. 1 answer
2. 485 views
The amount of copper was determined in 10 g sample. copper was precipitated, filtered and calcined, obtaining a final
1. 3 answers
2. 534 views
What is the volume of solution in which 7.6 g of FeSO4 should be dissolved in order to obtaina solution is 0.1 N?
1. 3 answers
2. 308 views
the clover told me he was good luck
1. 3 answers
2. 480 views
a plant grew 18 inches over 5 months. the plant grows the same amount each month. use this rate to complete the tabel
1. 3 answers
2. 687 views
define risky behaviours
1. 1 answer
2. 488 views
who should I choose on call of the wild
1. 2 answers
2. 511 views
0,0,3,4,5,7,8,9,36
1. 1 answer
2. 250 views
What is the answer to to 85,639 with the underlined being 3 answer ? I got 85,640 is this correct
1. 1 answer
2. 314 views
Calculate the volume of hydrogen gas from the C4H9O3N compound, under temperature or pressure conditions (STP).
1. 4 answers
2. 446 views
Indicate what type of compound (ionic or covalent) would be expected from the possible binary combinations of the following
1. 3 answers
2. 657 views
What is the %v/v concentration of a solution made by adding 25 ml of acetone to 75 ml of water?
1. 4 answers
2. 1,977 views
What volume of 0.307 m naoh must be added to 200.0ml of 0.425m acetic acid (ka = 1.75 x 10-5 ) to produce a buffer of ph =
1. 2 answers
2. 674 views
The melting temperatures of the two isomers of molecular formula C2H6O are-139 °c and-115 °c. Knowing that one of the isomers
1. 2 answers
2. 722 views
What is the g/L concentration of a solution terminating 10g of NaCI with 95% purity in 250 ml of water?
1. 1 answer
2. 382 views
A calorimeter is filled with 250.0 g of water at 24.6oC. A 60.0 g sample of a metal at 100.0 oC is dropped in this calorimeter
1. 2 answers
2. 742 views
What volume of 15.00 M CaCl2 solutions is needed to make 3.000 gallons of 5.500 M CaCl2 solution ?
1. 1 answer
2. 493 views
Knowing that the Atom X mass is equivalent to 6 boron 10 atoms, what is the relationship between the masses of atom X and the
1. 1 answer
2. 516 views
What is the pH of sodium hydroxide (NaOH) 0.5N
1. 2 answers
2. 963 views
5.750 ml of a soil sample was dissolved in water up to the volume of 50 ml. An aliquot of 10 ml of the same was transferred to
1. 2 answers
2. 554 views
25 ml of milk were titrated with a 0.124M KOH solution of potassium hydroxide. If 4.5 ml of KOH solution were required to reach
1. 2 answers
2. 640 views
An analyst wants to determine the content of a 7% magnesium hydroxide bottle acquired in a drugstore, through the Volumetry
1. 2 answers
2. 543 views
We can determine the content (%) of calcium in milk through complexometric analysis by titration with EDTA. If we weigh 0.50 g
1. 3 answers
2. 753 views
What is the quantity of material of NH4Cl that should be added to a solution 0.1 of NH3 to form 1L of a solution with ph 8? Kb =
1. 4 answers
2. 436 views
Ok i just wants to meke sure if this is grammatically correct.Here is the phrase: "The personal growth throughout one's life" or
1. 3 answers
2. 524 views
An impure silver sample weighing 0.1652g reacts with diluted HNO3, forming the add HCl, a white precipitate that weighed 0.0911
1. 1 answer
2. 501 views
The volume of a H2SO4 solution to 36.75% by weight of density 1, 8g/cm ^ 3, necessary to prepare 500 ml of a solution 3N of
1. 2 answers
2. 510 views
For the determination of the quantity of chloride in a physiological serum sample by the Volhard method, a sample of 25.00 ml
1. 2 answers
2. 622 views
Inglês Português EspanholFor the determination of the quantity of chloride in a physiological serum sample by the Volhard
1. 2 answers
2. 569 views
A 100ml aliquot of a water sample containing Ca(II) and Mg(II) is titrated with 22,74mL of EDTA 0.00998 mol/L at PH 10. Another
1. 2 answers
2. 854 views
Certain sample of 850 grams of ethyl alcohol has a purity of 96% in mass relative to the C2H6O2, which is the mass in grams of
1. 1 answer
2. 400 views
The decomposition of hydrogen iodide if the equation: 2HI (g)--> H2 (g) + I2 (g) The reaction is second order and has a constant
1. 3 answers
2. 1,044 views
Which is the mass of the solute in 400 grams of 20% solution. What is the concentration of this solution knowing that its
1. 1 answer
2. 474 views
A 0.8552g sample of copper alloy is treated with 8 molar nitric acid and filtered and the precipitate is ignited giving a
1. 5 answers
2. 795 views
What's the name of the following compound? H3C-H2C-H2C-SO3H
1. 2 answers
2. 627 views
Why is CO2 not ionic?
1. 3 answers
2. 321 views
What is the mass of the organic substance formed by heating of 21.0g of butanoate of ammonium, admitting that the reaction
1. 3 answers
2. 411 views
For a 0.50 molal solution of sucrose in water, calculate the freezing point and the boiling point of the solution. Please list
1. 4 answers
2. 881 views
Why is 5% NaOH insoluble in HCl?
1. 3 answers
2. 341 views
Use the law limit of Debye-Huckel and calculate the average activity coefficient for a solution of NaCl 0.050 mol/kg
1. 1 answer
2. 414 views
It has a solution to 10% v/V that has a density of 1.3 g/mL and a total volume of 200 mL(a) that solute mass has the solution
1. 1 answer
2. 372 views
arrange smallest to largest 3/4,2/3,5/9,5/6
1. 1 answer
2. 475 views
A 5.7 g bullet leaves the muzzle of a riﬂe with a speed of 636.8 m/s. What constant force is exerted on the bullet while it is
1. 2 answers
2. 778 views
y=8+13x
1. 1 answer
2. 316 views
3 equal charges each of of 2*10-6 C are fixed at three corners of an equilateral triangle ofsides 5 cm.find the column force
1. 2 answers
2. 617 views
3 equal charges each of of 2*0.000001C are fixed at three corners of an equilateral triangle ofsides 5 cm.find the column force
1. 2 answers
2. 732 views
A 1L flask contains 0.2moles of air open to atmosphere at 0degree celcius. Upon heating some of the air is lost. What is the
1. 1 answer
2. 457 views
A three-strand wire fence around a square 40-acre parcel would require how much wire?
1. 1 answer
2. 371 views
Develop a unit of learning at the end of which learners should be able to: reduce any angle in the first quadrant of a Cartesian
1. 2 answers
2. 569 views
using the Kw for pure water, show that: pH = pKw - pOH
1. 1 answer
2. 400 views
the area of the pool is 108m. what is the length of the pool if it is 9m wide
1. 1 answer
2. 304 views
what generalization can you make about the abolition of slavery in the north?
1. 7 answers
2. 3,233 views
A cyclinder cooling tank has an outside diameter of 6.00 ft. the wall on all sides are 5.00in thick and the tank is 10.0ft tall.
1. 1 answer
2. 469 views
A cyclinder cooling tank has an outside diameter of 6.00 ft. the wall on all sides are 5.00in thick and the tank is 10.0ft tall.
1. 1 answer
2. 505 views
A rectangle piece of gold has dimensions 0.3125in. by 18.0in by 15.0 in what is its total surface area? if gold weighs
1. 1 answer
2. 446 views
Each cylinder bore of a cylinder engine has a diameter of 2.50in. and a height of 4.90 what is the combined total surface area
1. 2 answers
2. 541 views
Train #1 leaves san diego at 4pm. train #2 leaves san diego at 6pm.train #2 travels 42 mph faster than train #1. if train # 2
1. 3 answers
2. 915 views
Please I need help with this problem.it took us 3 hour to drive to a concert.on his way home he increased his speed by 19 miles
1. 3 answers
2. 460 views
it took us 3 hour to drive to a concert.on his way home he increased his speed by 19 miles got home in 2 hours . what was the
1. 3 answers
2. 581 views
The endpoints of are A(2, 2) and B(3, 8). is dilated by a scale factor of 3.5 with the origin as the center of dilation to give
1. 3 answers
2. 1,570 views
i want to neutralize a 10 ml 3 molar sulfuric acid using calcium carbonate but don't know how to do the math the explanation
1. 2 answers
2. 533 views
How many grams of calcium carbonate would it take to neutralize if i have 10ml 3 molar sulfuric acid?(can this be explained in
1. 1 answer
2. 494 views
Suppose that a crayon weighs the same as a marker. You have a box of crayons, 4 extra crayons, and 20 markers. Let b be the
1. 2 answers
2. 793 views
2ax - 3ay + 2x - 3y
1. 2 answers
2. 641 views
what is the time for the first clock
1. 1 answer
2. 366 views
What career can I take
1. 7 answers
2. 675 views
what are the 5 number combo in 1 to 39
1. 5 answers
2. 4,569 views
Joan receives an annual salary of $22,768.68. What is the total amount of her gross pay each period if she is paid monthly?
1. 1 answer
2. 355 views

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