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Kristin

Questions (111)

In exercises 1-4 find each sim or difference 5/10 - 3/10(Been up all night studying 💀 it’s 1:34AM)
1. 1 answer
2. 248 views
What is 4.39 × 10−6 in standard form?
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2. 497 views
What is the limiting reactant if 0.500 g Aluminum is reacted with 3.500 g Copper (II) chloride (when calculating the molar mass
1. 1 answer
2. 1,398 views
max has a box of 200 colored blocks. the box has an equal number of green and blue blocks and equal number of red and yellow
1. 3 answers
2. 2,014 views
Which of the following are ways that intellectual, political, social, and religious developments of the seventeenth century were
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2. 1,403 views
Paul works for three hours. Sally works 2 1/2 times as long as Paul. Raul works 3/4 hours less than Paul. Tim works 1 1/3 times
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2. 409 views
What is the standard cell potential of a cell made of theoretical metals Ms/Ma^+2 and Mb/Mb^+2 if the reduction potentials are
1. 1 answer
2. 1,152 views
What symbol is used to show the standard reduction potential of an oxidation reaction in a half cell? The sub means what follows
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2. 1,603 views
To charge a lead storage battery you mustapply a direct current to it. hold a magnet close to it. force alternating current
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2. 487 views
A 10.0 mL sample of whiskey was diluted to 500.0 mL. A 4.00 mL aliquot of the diluted sample was removed and the ethanol,
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2. 1,332 views
Suppose you have a stack of 9 identical oak planks, each of which have a mass of 8.0 kg. You are required to pull the seventh
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2. 495 views
A block of mass 8.60 kg is pulled along a horizontal frictionless surface by a cord that exerts a force of 33 N at an angle
1. 1 answer
2. 561 views
The top of a tree makes angles s and t with Points K and L on the ground, respectively, such that the angles are complementary.
1. 2 answers
2. 4,856 views
You attach one end of a spring with a force constantk = 893 N/m to a wall and the other end to a mass m = 2.02 kg and set the
1. 1 answer
2. 1,988 views
In a solution of a weak acid and its conjugate base, which condition has to be true for pH to equal pKa?The concentration of
1. 3 answers
2. 546 views
Calculate the hydronium ion concentration of blood which has a pH of 7.24.7.17 x 10-4 M 5.75 x 10-8 M 1.15 x 10-7 M 0.86 M none
1. 1 answer
2. 1,592 views
What is the pH of a solution which has hydroxide concentration, [OH-], equal to 7.6 x 10-4 M?0.88 3.12 10.9 13.1 none of the
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2. 499 views
How many moles of chlorine are there in 16.0 mL of 0.450 M CaCl2?0.0072 mol 0.0144 mol 0.0216 mol 0.0375 mol none of the above I
1. 3 answers
2. 631 views
Four sets of conjugate acid/base pairs and Ka of the acid are given. Which pair would be the best to form a buffer at pH = 9.2?
1. 3 answers
2. 703 views
The Ka for the reaction of acetic acid and water is 1.8 x 10-5.Which of the following statements is true at pH 7? A.) there is
1. 1 answer
2. 791 views
The ethylammonium ion, CH3CH2NH3+, has a pKa of 10.81. It reacts with water to form ethylamine, CH3CH2NH2 and H3O+.Which of the
1. 1 answer
2. 2,100 views
A 0.205 kg bird flying along at 7.8 m/s sees a 0.029 kg insect heading straight toward it with a speed of 15 m/s (as measured by
1. 1 answer
2. 733 views
Mallory has a credit score of 680 and she is offered and interest rate of 8.3%. is this a good offer? Explain your answer.
1. 0 answers
2. 401 views
(7x^2+3x+9)+(2x^2+5x-2)
1. 1 answer
2. 347 views
2x-------- (x-2)(x+2) using partial fractions That's supposed to be a division sign of some sort
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2. 507 views
find the co-ordinatesy=x(2-x) where the gradient is 2
1. 2 answers
2. 428 views
1/X by first principles
1. 4 answers
2. 548 views
A fragment of bone is discovered to contain 20% of the usual carbon-14 concentration. Estimate the age of the bone to the
1. 2 answers
2. 1,517 views
Find the volume of the solid generated by rotating about the y axis the area in the first quadrant bounded by the following
1. 2 answers
2. 2,863 views
A movie complex has eight different movie theaters. The manager of the complex wants to conduct a survey to determine which
1. 2 answers
2. 1,578 views
Is the proportional?x: 1 3 4 6 y: -4 -12 -16 -24 I think it is. Am I correct?
1. 1 answer
2. 351 views
The point Q(x,y) is reflected in the origin. Use arrow notation to describe the original point and its reflection.I chose this:
1. 3 answers
2. 636 views
XYZ has vertices X(5,6), Y(9,12), and Z(12,8). it is translated right 8 units and up 3 units. What are the coordinates of X',
1. 5 answers
2. 2,852 views
If you put me into 7 equal groups with 3 in each group and 5 are left over, what number am I?
1. 1 answer
2. 537 views
Two 75 kg hockey players skating at 5.50 m per s collide and stick together. if the angle between their initial directions was
1. 1 answer
2. 1,536 views
Anhydrous aluminum oxide can be reduced to aluminum according to thisa chemical equation: 2 Al2O3 (s) ---> 4 Al (l) + 3 O2 (g)
1. 1 answer
2. 653 views
What mass of copper(II) nitrate would be produced from the complete reaction of 65.3 g of copper, according to the chemical
1. 1 answer
2. 831 views
a. How many atoms of hydrogen are in 25.0 g of ammonia (NH3)? Use the format 6.02E+23 for 6.02 x 1023b. How many atoms of
1. 1 answer
2. 536 views
Meg's pension plan is an annuity with a guaranteed return of 4% per year (compounded quarterly). She would like to retire with a
1. 0 answers
2. 958 views
Caculate the volume of CO2 gas given off at 756 mm Hg and 23C when 150 kg of limestone(CaCO3) is heated until it decomposes
1. 2 answers
2. 659 views
The focal length of the objective of a telescope is 0.2 m and the eyepiece has a focal length of 1.6 m. What is the length of
1. 1 answer
2. 931 views
Patsy has cheerleading practice on every fourth school day. She wants to be in the school play, but they have practice on every
1. 5 answers
2. 1,462 views
Jack has the following scores on exams in his math class.81, 87, 93, 89, 61, 81 If he wants to make his performance sound as
1. 38 answers
2. 7,765 views
The average temperature in households is 67.6 degrees F. The standard deviation is 4.2 degrees F. A random sample of 51
1. 1 answer
2. 549 views
How did england change after its war with spain? and How did this change played a role and part in history by analyzing the
1. 1 answer
2. 488 views
2. If a firm increases all of its inputs by 60 percent and its output increases by 90 percent, then you know that:A) it is
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2. 579 views
Suppose that a tour bus business incurred implicit costs of $600,000 and explicit costs of $7 million in a specific year. If the
1. 0 answers
2. 589 views
A rock sample contains only Sb2S3 and FeS. If 835g of the sample contains 11.2% antimony, what is the mass percent of the Sb2S3
1. 1 answer
2. 736 views
100 ml of 0.01N HCl is added to 0.9L of distilled water. What would the final pH of the solution be?
1. 1 answer
2. 466 views
I am having trouble with a question.In order to get an idea of significant subject areas in a chapter, it is best to read the.
1. 3 answers
2. 537 views
If you reclaim 0.250g Ag from AgNO3, how much AgNO3 did you have to begin with?
1. 1 answer
2. 449 views
A 3.30-kN piano is lifted by three workers at a constant speed to an apartment 28.8 m above the street using a pulley system
1. 1 answer
2. 1,271 views
If a projectile is launched from Earth with a speed equal to the escape speed, how high above the Earth's surface is it when its
1. 1 answer
2. 1,186 views
Factor 15x^2 - 8x - 16
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2. 551 views
X^2-4x=0
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2. 271 views
A driver in a car traveling at a speed of 56.0 mi/h sees a deer 116 m away on the road. Calculate the minimum constant
1. 1 answer
2. 629 views
This is part of a marathon problem, we have to identify the five compunds of H, N, and O described below. For each compound, I
1. 1 answer
2. 726 views
What is the transfer mechanism of energy, momentum, and angular momentum?
1. 0 answers
2. 401 views
suppose you have 2 cars, and the larger one is twice as massive as the smaller one. If you and a friend push on them so that
1. 3 answers
2. 947 views
Suppose D=(w+2)(w-3)(w+6).For what three values of w will D have a value of 0?
1. 1 answer
2. 455 views
If solution A had a pH of 8, and solution B had 1,000 times this hydrogen ion concentration what would be the pH of solution B,
1. 1 answer
2. 1,554 views
find the coordinates of the terminal point on the unit circle determined by t=9pt/7 to two decimal places
1. 2 answers
2. 1,426 views
The position vector r of a particle moving in an xy plane is given by [r = (6t^3-3t)i + (4-1t^4)j] with r in meters and t in
1. 0 answers
2. 1,215 views
To subtract 91 from 99, do you need to regroup? Explain
1. 1 answer
2. 469 views
To subtract 91 from 99, do you need to regroup? Explain
1. 2 answers
2. 869 views
Bethany has 40 apples. Write a subtraction story about the apples that would require regrouping. Then write the answer in a
1. 4 answers
2. 900 views
When 0.100 mol of carbon is burned in a close vessel with 8.00g of oxygen, how many grams of carbon dioxide can form?
1. 0 answers
2. 472 views
An intrepid explorer takes 400 g of ice from the cold Siberian environment, where the temperature is –40 degrees and places it
1. 1 answer
2. 1,160 views
write the balanced equation for the ionization of the weak base pyridine, C5H5N, in water
1. 7 answers
2. 35,743 views
you have 47 mL of a 2 M stock solution that must be diluted to .5 M how much water should you add
1. 1 answer
2. 487 views
The function f is continuous on the closed interval [0,6] and has values that are given in the table below.x |0|2|4|6
1. 1 answer
2. 6,935 views
at 1 atm how much energy is required to heat 67 grams of H2O(s) at -22 degrees C to H2O(g) at 159 degrees C
1. 1 answer
2. 611 views
Find a rule that gives the third number from the first two numbers. Fill in the blanks.....10, 4, 5, ? 15, 7,7, ? 19,9,?
1. 1 answer
2. 521 views
I don't understand how you know what state designation things are in a chemical equation. For example this is given:2 (NH4)3PO4
1. 1 answer
2. 524 views
A coiled Hookean spring is stretched 10 cm when a 1.5kg mass is hung from it. Suppose a 4 kg mass hangs from the spring and is
1. 2 answers
2. 3,592 views
An urn holds 13 identical balls except that 2 are white, 4 are black, and 7 are red. An experiment consists of selecting two
1. 0 answers
2. 810 views
An urn holds 13 identical balls except that 2 are white, 4 are black, and 7 are red. An experiment consists of selecting two
1. 1 answer
2. 1,246 views
Explain the Difference during the Roman Empire on what Augustus says about himself and what Tacitus says about Augustus
1. 5 answers
2. 596 views
The standard enthalpies of formation of ions in aqueous solutions are obtained by arbitrarily assigning a value of zero to H
1. 2 answers
2. 1,430 views
The informant, who will not be named, called in a tip last night informing police officers about an attempted robbery.The cold,
1. 1 answer
2. 378 views
Directions: We recently watched the movie "Schindler's List," and now we have to write an essay. So I chose to write it based on
1. 10 answers
2. 764 views
I'm trying to find the solubility of Ca(OH)2 in .0125 mol/L aqueous NaOH. Here is my data:Vol of solution used per titration:
1. 5 answers
2. 2,852 views
The solubility of compounds containing the carboxylic acid group can be increased by reaction witha) sulfuric acid b) nitric
1. 3 answers
2. 2,158 views
The solubility of compounds containing the carboxylic acid group can be increased by reaction witha) sulfuric acid b) nitric
1. 1 answer
2. 692 views
1)x+8y=33 -x+4y=3 I need help solving this one using the elimination method!
1. 1 answer
2. 491 views
1)6m+n=47 m-4n=12 can someone help me solve using substitution method?
1. 1 answer
2. 715 views
can someone please help me with this elimination methods problem?0.05x+0.25y=11 0.15x+0.05y=12 solve using the elimination
1. 2 answers
2. 872 views
Elimination Method....I am not understanding this method either and need some help here is what I am working on:1) x+8y=33
1. 3 answers
2. 858 views
Can someone help me solve the following problems using the substituion method? I need to find the ordered pairs and I do not get
1. 5 answers
2. 980 views
If you see a lightening bolt, then count 4 seconds until you hear thunder, about how far away was the lightening strike?
1. 2 answers
2. 572 views
A tennis ball is dropped from the top of a building. It falls for 2.5 seconds before it hits the ground. (a) What velocity is
1. 2 answers
2. 950 views
If an arrow is fired at 200km/h horizontally, about how long will it take to strike a target 30 meters away?
1. 1 answer
2. 469 views
what might be the cause of onset of social fobia in a 19 year old boy?
1. 2 answers
2. 397 views
What are the parts of speech to each word in this sentence: I like the movie Clueless its based on Jane Austens novel Emma.
1. 1 answer
2. 1,029 views
what 2 substances found in my home that could conduct electricity and explain why?
1. 3 answers
2. 515 views
What did scientist learn from studying Supernova 1987A?
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2. 552 views
We are trying to raise money in our high school for children with cancer. Do you have any suggestions as to what we should do?-D
1. 1 answer
2. 455 views
Hi, again. I need help with this worddecorum. the def is ADJ proper; seemly correct how do i use this in a sentence?
1. 11 answers
2. 596 views
is the sentence:slough is very prominent in many households that are in the slums gramatically correct? how do i use slough in a
1. 6 answers
2. 520 views
does anyone know what the ap exam for gov and pol is like?
1. 1 answer
2. 329 views

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