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Lauren

Questions (1,093)

How do I find potential energy of a car at the speed when collision occurs if the kinetic energy during the collision at 28 mph
1. 6 answers
2. 383 views
Which type of radiation does not involve the nucleus turning into the nucleus of a new element
1. 2 answers
2. 287 views
Which type of radiation is most dangerous standing about 10cm away from the source
1. 1 answer
2. 344 views
A solution of a drug was freshly prepared at a concentration of 225 ug/mL. After 15 days in solution, the drug concentration in
1. 1 answer
2. 516 views
Why is a material with a high specific heat capacity better suited for use in a heating system than a material with low heat
1. 2 answers
2. 1,173 views
Why is a material with a high specific heat capacity better suited for use in a heating system than a material with low heat
1. 0 answers
2. 594 views
Is the phrase below correct?“Ten milliliter of water residue”
1. 1 answer
2. 308 views
You are a workstudy for the chemistry department. Your supervisor has just asked you to prepare 500mL of 3M HCl for tomorrow's
1. 7 answers
2. 4,785 views
N2(g) + 3H2(g)  2NH3(g) at STPHow many litres of ammonia gas is produced using 5 litres of H2? N2 + 3H2 ---> 2NH3 - the ratio
1. 4 answers
2. 3,033 views
Zn(s) + 2HCl(l)  ZnCl2(s) + H2(g) at STPWhat mass of zinc is needed to produce 115 mL of hydrogen? - it's given 115 mL of
1. 1 answer
2. 1,908 views
2 KOH(l) + H3PO4(l) --> K2HPO4(l) + 2 H2O(l)a) How many mL of 0.450M KOH is needed to react with 60.0mL of 0.250M H3PO4? a)
1. 4 answers
2. 1,807 views
2 C8H18(g) + 25 O2(g)  16 CO2(g) + 18 H2O(g) at STPHow many moles of O2 are needed to react with 60.0g of C8H18 (octane)?
1. 5 answers
2. 4,429 views
I need help putting my answers in significant figures thanks2 C8H18(g) + 25 O2(g)  16 CO2(g) + 18 H2O(g) at STP How many
1. 3 answers
2. 696 views
Convert 25 mL of 0.80 mol/L Mg(NO3)2(aq) into molesmoles of Mg(NO3)2 = 0.8 x (25/1000) = 0.02
1. 2 answers
2. 1,486 views
How many more times basic is bleach (pH of 12) than distilled water (neutral pH)?Answer= 100,000 Can someone explain how to get
1. 2 answers
2. 435 views
How do you write an equation with two fractions into standard form?(2/5)x + (1/3)y - 2=0
1. 2 answers
2. 1,329 views
Simplify in radical form2-√12 / 3+√5 Two minus radical twelve over three plus radical five. I believe I have to multiply by
1. 2 answers
2. 587 views
The mass of a rocket car plus fuel is 2,000 kg. The rocket car starts from rest. The engine expels fuel (in the form of exhaust)
1. 2 answers
2. 838 views
Any ideas on:Why does society perceive street (blue collar) crime has more impact in society? Why does society perceive white
1. 1 answer
2. 650 views
If the coefficient of kinetic friction is 0.24, how much work do you do when you slide a 55 kg box at constant speed across a
1. 1 answer
2. 976 views
How does meads theory apply to one's life?
1. 4 answers
2. 433 views
Will some help me write an alternate ending to frankenstein. Please
1. 8 answers
2. 1,316 views
The radius of a single atom of a genenric element x is 197 pm and a crystal of x has a unit cell that is face centered cubic.
1. 2 answers
2. 597 views
Hi Can someone please help me for an introduction on the topic of Gods existence being real . so Far all i have is God's
1. 5 answers
2. 519 views
Hi, could someone check my answers?The nucleus of an atom is made of _______. electrons and empty space protons and neutrons**
1. 2 answers
2. 863 views
1. Let S be between R and T. Use the Segment Addition Postulate to solve for m.RS = 2m + 2 ST = 3m + 3 RT = 15 A. m = 3 B. m = 2
1. 2 answers
2. 1,977 views
1 When he awoke, it was three o’clock in the afternoon. He bounded up with a start; half of one of2 his precious days gone
1. 0 answers
2. 833 views
22 dramas, the text of all romances, the nerve-stuff of all sensations was whirling about him like the23 snowflakes. Lines
1. 2 answers
2. 573 views
The suffix —ly, as in the word pretentiously, means which of the following? (1 point)Pretentiously is an
1. 9 answers
2. 5,162 views
Since words have multiple meanings, the context of a word often provides clues to its meaningbetter than the
1. 2 answers
2. 3,685 views
Whose writing reflects the following regional dialect?“‘Scuse me, suh, I’s lookin’ for my husban’. I heerd you
1. 3 answers
2. 2,370 views
The following is an example of regional dialect from which author?"The feller took the money and started away; and
1. 3 answers
2. 3,452 views
Which poetic device is used in the sentence "There was an iciness, a sinking, a sickening of theheart"?
1. 3 answers
2. 2,659 views
Hi this question is on my study guide and I want to make sure I get to the right answer and know why.Calculate K for the
1. 4 answers
2. 830 views
Hi this question is on my study guide and I want to make sure I get to the right answer and know why.Explain why the following
1. 1 answer
2. 631 views
What is the molar change in enthalpy when 100g of ice is heated from -72°C to -18.2°C?(cp=37.4 J/k•mol)Would the answer be
1. 1 answer
2. 1,250 views
2 adults and 4 children are going to disney it cost $107 for adults and $101 for kids. They dont want to spend more than $650
1. 1 answer
2. 492 views
Acid-Base TitrationsIn an indicator whose transition range is well above 7, ionization tends to be a. come complete and In- is a
1. 1 answer
2. 530 views
What is the normal concentration of an HNO3 solution if 412 mL of the solution is titrated by 147 mL of 2.03-N NaOH?What is the
1. 1 answer
2. 674 views
Acid-Base TitrationsThese are fill in the blank and I really am not sure what the answers are 1. Indicators change color over a
1. 1 answer
2. 1,011 views
What is the conjugate base of each of the following?H2SO4 H2CO3 NH3 HF
1. 1 answer
2. 525 views
What is the conjugate base of each of the following?H2SO4 H2CO3 NH3 HF
1. 1 answer
2. 499 views
Write the net ionic equation for the following reaction :Na3SO4(aq) + Ba(NO3)2(aq) —> BaSO4 (s) + 2 NaNO3(aq)
1. 3 answers
2. 2,622 views
In the 18th century Lavoisier experimented with oxides, such as CO2 and SO2. He observed that they formed acidic solutions. His
1. 1 answer
2. 575 views
Confused on these, please explain or show work for the answer if you can. :)1. What is the morality of a water solution that
1. 1 answer
2. 935 views
The volume of a balloon is 1 liter at 1 atm pressure and 0°C temperature.What volume is the ballooon at 2 atm pressure and
1. 1 answer
2. 650 views
Calculate the volume of 1.86M Na3PO4 solution that can be prepared from 5.45 g of Na3PO4
1. 1 answer
2. 585 views
Suppose that 2.00mL of 0.02 mol/L aqueous sodium sulphide, Na2S is used to test a 60.0mL sample of water containing 0.0004 mol/L
1. 1 answer
2. 947 views
Name the congruent angles and sides for the pair of congruent triangles.∆MGB ≅ ∆WYT
1. 1 answer
2. 1,901 views
Find the measures of the sides of ∆ABC and classify the triangle by its sides.A(3,-3), B(1,4), C(-1,-1)
1. 1 answer
2. 2,942 views
Over the years, the thermjte reaction has been used for welding railroads, in incendiary bombs, and to ignite solid fuel rocket
1. 1 answer
2. 510 views
Over the years, the thermjte reaction has been used for welding railroads, in incendiary bombs, and to ignite solid fuel rocket
1. 1 answer
2. 705 views
When 5.49 g of platinum reacts with an excess of fluorine, 7.65 g of platinum(_) fluoride forms.a. What is the mass of fluorine
1. 2 answers
2. 2,187 views
00 is infinity6. x\ge \:-2 or x>5 Interval notation (-00, -2] U (5,00) what will be the plotting points on the number line. 7.
1. 1 answer
2. 750 views
Graph the inequality on the numberline and then write it in interval notation.5/3y < 10
1. 1 answer
2. 582 views
Graph the inequality on the number line and then write it in interval notation.Y+1/2≥2/3.
1. 2 answers
2. 640 views
The ice rink sold 94 tickets for the afternoon session, for a total of $778. General admission tickets cost$10 and youth tickets
1. 1 answer
2. 434 views
At 1:30 Marlon left his house to go to the beach, a distance of 9 miles. He rose his skateboard until 2:15, and then walked the
1. 1 answer
2. 622 views
The ice rink sold 97 tickets for the afternoon session, for a total of$765. General admission tickets cost $10 and youth tickets
1. 1 answer
2. 565 views
The ice rink sold 90 tickets for the afternoon session, for a total of $700. General admission tickets cost$10 and youth tickets
1. 4 answers
2. 523 views
At 1:30 Marlon left his house to go to the beach, a distance of11.25 miles. He rose his skateboard until 2:15, and then walked
1. 1 answer
2. 771 views
Nathan has $322 worth of $11 and $13 stock shares. The number of $11 shares is seven more than twice the number of $13 shares.
1. 1 answer
2. 455 views
Cassius drives his boat upstream for30 minutes. It takes him 15 minutes to return downstream. His speed going upstream is two
1. 3 answers
2. 3,715 views
how many times does the sun appear to rise in a week?A) one B) Five C) seven D) not there I think it's c) seven. Plz check.
1. 1 answer
2. 383 views
Lindsay draws a right triangle and adds the measure of the right angle and one acute angle. Which is a possible sum of the two
1. 3 answers
2. 1,562 views
A certain grometry class has 36 students. if two-thirds are boys and three-fourths of the boys are under six feet tall, how many
1. 7 answers
2. 663 views
A motorboat is headed [W35ºN] with its engine set to move the boat at 25 km/h in still water. The current is flowing at 18 km/h
1. 2 answers
2. 955 views
This is going to seem like a silly question, but I have to round points that fall on a graph to the nearest 1.25. Some of the
1. 1 answer
2. 426 views
What is the probability that the average lifetime of 25 bulbs would be no more than 1550 given mean of 1500 and standard
1. 1 answer
2. 674 views
Please help me understand this is asking and how to solve.P(-2>Z and Z<-1)= and X~N(3,4). Find value c such that P(c<x)=.7 Thank
1. 3 answers
2. 477 views
What is the purpose of the NAFTA treaty?
1. 16 answers
2. 5,374 views
A pilot checks her instruments and finds that her airspeed is 345 km/h and that she is heading in a direction [S40ºW]. A radio
1. 1 answer
2. 798 views
When 0.010 moles of Zn(s) reacts with 30.0 mL of 1.0 M HCl, the H2 gas produced is collected in a 1.0 L flask at a temperature
1. 1 answer
2. 905 views
1 pt) Consider the function f(x), for which f(0)=4 and f′(0)=−6.Find h′(0) for the function h(x)=1/f(x). h′(0) =
1. 1 answer
2. 444 views
One hour after x milligrams of a drug are given to a person, the change in body temperature T(x) (in degrees fahrenheit) is
1. 0 answers
2. 638 views
f(x)=x^9h(x)h(âˆ’1)=5 hâ€²(âˆ’1)=8 Calculate fâ€²(âˆ’1).
1. 0 answers
2. 315 views
Suppose that f(x)=6x^âˆ’4+9x^âˆ’2. Evaluate each of the following:f'(3)= f'(-1)
1. 0 answers
2. 392 views
For what values of x is the tangent line of the graph off(x)=2x^3−12x^2+19x+0 parallel to the line y=1x+0.7 ? Enter the x
1. 1 answer
2. 2,443 views
A population P is a function of time t that had 5000 when t=0 can be written P(t)= 5000+B(t)-D(t). B(t) is the number of births
1. 1 answer
2. 458 views
How many grams of K2SO3 would be required to react completely with 200.0 mL of 0.245 M HCl
1. 1 answer
2. 1,024 views
The constants for Antoine’s equation for TCE (based on log10 and oC) are: A= 6.5183, B = 1018.6 and C = 192.7. If a container
1. 0 answers
2. 789 views
A field must be fenced in. There is 212 yards of fencing material to be used.What should the dimensions of the enclosed area be
1. 1 answer
2. 439 views
Each cow eats 4.5 cups of feed a day and the bucket it comes in contains 250 cups.The buckets cost $26.75 each. If a farm has 16
1. 1 answer
2. 405 views
A field must be fenced in. There is 212 yards of fencing material to be used.What should the dimensions of the enclosed area be
1. 1 answer
2. 396 views
use implicit differentiation to show: d/dx(tan^-1x)=1/(x^2+1)
1. 1 answer
2. 712 views
1. We are interested in conducting a study in order to determine what percentage of voters of a state would vote for the
1. 1 answer
2. 1,752 views
A tennis ball is served from the back line of the court such that it leaves the racket 2.4 m above the ground in a horizontal
1. 1 answer
2. 2,260 views
A meter stick whose mass is 0.200 kg is supported at the zero cm mark by a knife edge and a force F at the 100 cm point. A mass
1. 6 answers
2. 1,549 views
Sandy drives the first 3 hours of her trip at 65 miles per hour. The last hour of the trip she drives 62 miles per hour. How far
1. 3 answers
2. 415 views
Calculate the lengths of the straight lines joining the following pairs of points, leaving your answers in surd form:(a)
1. 3 answers
2. 685 views
The points A(1,5) and B(9,3) are part of a triangle ΔABC. The triangle has a right angle at A and and sides satisfy AB=2AC.
1. 2 answers
2. 526 views
Consider the 4 points A(1,5), B(-4,6), C(0,0), D(-12,12). Find the gradients of the lines:(a) AB; (b) CD; (c) BD.
1. 1 answer
2. 439 views
By making the substitution u =ln x show that the following equation has exactly one real-number solution:9/ln x + ln x^4 =-12
1. 1 answer
2. 461 views
By making the substitution u =ln x show that the following equation has exactly one real-number solution:-12/ln x +ln x^4 = -9
1. 1 answer
2. 425 views
By making the substitution u=7^x and using part a, derive a hidden quadratic equation7^(2x-1) +4×7^(x-1) -1/14 =0 and hence
1. 1 answer
2. 477 views
By making the substitution u =ln x show that the following equation has exactly one real-number solution:-12/ln x +ln x^4 = -9
1. 2 answers
2. 444 views
By making the substitution u=7^x and using part a, derive a hidden quadratic equation7^(2x-1) +4×7^(x-1) -1/14 =0 and hence
1. 2 answers
2. 555 views
Let u=7^x. Using the rules for powers show that i) 7^x-1 = u÷7and ii) 7^2x-1 = u^2÷7
1. 1 answer
2. 410 views
f (x) = 9x^3 + 2x^2 - 5x + 4 and g(x) = 5x^3 - 7x + 4. What is f (x) - g(x)? Show all your stes and write your final answer in
1. 3 answers
2. 456 views
Determine the mass of urea, CH2N2O, required to make 250mL of a 0.235 M solution
1. 1 answer
2. 501 views

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