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Erika
Questions and answers by
Erika
Questions (211)
Given the following equation : 2Al+6HCl 2AlCl 3 +3H 2 If 3.00 grams of H 2 were produced, how many grams of Al reacted ? (Molar
6 answers
6,130 views
Assume the fallowing date describe the condition the bankercy systemTotal reserve 200 billions
Transaction deposit 800 billion
1 answer
448 views
How did WW2 influence the United nations? How did this affect its structure?
1 answer
340 views
Use the following to answer questions 1-3:
1. Refer to the above diagram. If demand changes from D1 to D2 at the same time supply
4 answers
1,565 views
how do you do these kid?-6=3u/4+12
1 answer
351 views
How many grams of calcium oxide, CaO, can be produced from 4.20 g of calcium metal and 1.60 g of oxygen gas?
5 answers
2,901 views
An aqueous solution of silver nitrate contains 5.00 g of silver nitrate. To this solution is added sufficient barium chloride to
2 answers
1,094 views
The binding energy of an electron to a metal surface is 184 kJ/mol. What is the threshold wavelength (in nm) for the onset of
3 answers
776 views
Is it true that a p electron cannot have a magnetic quantum number equal to -2?
Is it also true that for the hyfrogen atom, a 3d
2 answers
681 views
Given the functions:
f(x) = x^2 - 1, g(x) = x/x + 2 Why is the followig the equation of (g o f)(x) THe answer is x^2 - 1 / x^2 +
1 answer
395 views
Evaluate the following limit:
lim x --> 2 sqrt(x^2 - x)/(2x - 3)
2 answers
589 views
What are the steps to finding that [0,4) U (4, positive infinity)is a representation of the domain of the expression:
h(x) = 12x
1 answer
433 views
Given the function
y = 2 - x - x^3 Use limits to find the slope (and then the equation) of the tangent line at x = 2
1 answer
345 views
A sample of solid monoprotic acid with molar mass equal to 169.7 g/mol was titrated with 0.1599 M sodium hydroxide solution.
2 answers
498 views
What is the total number of nonbonding valence electrons in the "dipolar ion" form of glycine, +NH3CH2COO-?
5 answers
854 views
The shape of H3C+ is best described as?
4 answers
1,433 views
If the length (L) of the prism is 10 inches, and each rectangular face has a width (W) 2�ã3 of inches, determine the total
3 answers
1,491 views
What are some advantages and disadvantages of an arms race?
2 answers
713 views
You are a physiologist on a space flight to a distant planet. You discover aliens inhabiting the planet and they are willing to
1 answer
482 views
You are a physiologist on a space flight to a distant planet. You discover aliens inhabiting the planet and they are willing to
2 answers
770 views
I need help with these problems:
1) A vending machine takes only nickels and dimes. There are 5 times as many dimes as nickels in
4 answers
1,563 views
A contract cannot involve both and implied warranty of merchantability and an implied warranty of fitness for a particular
2 answers
617 views
What is definite form?
1 answer
306 views
"wherever in the universe life exists, some of those life forms must be colored" is this true? if so please explain
1 answer
435 views
Who created the leading coefficient test?
1 answer
334 views
Given 20 mL NaOH; 0.1 M, add 0.05 M HCl, 10 mL at a time.
What is the pH initially of NaOH? What is the pH after adding 10 mL
3 answers
634 views
According to Renaissance philosophy, commoners often represent?
3 answers
1,063 views
Bread, Inc., has an odd dividend policy. The company has just paid a dividend of $6 per share and has announced that it will
2 answers
1,099 views
what is the first step of figuring out what
-5=-8+5f?
4 answers
353 views
2x+5=-7?
3 answers
244 views
Is rubbing alcohol a pure substance or a mixture?
2 answers
1,187 views
what is the mixture that is formed when one subtance dissolves in another called?
1 answer
410 views
What is the term that means "not able to be dissolved in a particular substance?"
1 answer
428 views
Simplify:
2xsquared minus 4xsquared
4 answers
927 views
Find the derivative of f(x) = ln(48e3x − 11)
1 answer
309 views
Find the derivative of
y = 2√s7 + 13
1 answer
267 views
What is the maximum weight (in grams) that 15 party balloons, each filled with 2 L of helium, can lift at STP? You can assume
1 answer
402 views
Find the equation of the tangent line to the graph of f(x) = −6x ln(x + 10) at x = 0.
4 answers
583 views
Has anyone read the story The Sniper, the sniper ends up killing his own brother at the end. One question I don't get is that
1 answer
418 views
Given the following reaction:
4 KO2 + 2 H2O + 4 CO2 4 KHCO3 + 3 O2 How many moles of H2O are needed to react with 12.15 moles of
2 answers
875 views
y= x-7
3x+6y=-6 I don't understand how to solve for the x-variable.
1 answer
392 views
find the parabola whose minimum is at (7,6) rather than the point given in the book.
The parabola's equation is y = x2 + ax + b,
4 answers
799 views
find the values a and b must have to make the function f(x) = axebx have the following properties, rather than the ones the book
2 answers
561 views
Let f(x)=−2 x^3 − 3 x^2 − 2 x − 10. Find the interval where f is concave up. I
Answer: < x < Find the interval where f is
1 answer
329 views
Find the points at which y = f(x) = 5x−ln(5x) has a global maximum, a global minimum, and a local, non-global maximum on the
3 answers
751 views
Find the points at which y = f(x) = x8−13x has a global maximum and minimum on the interval 0 ≤ x ≤ 3.7. Round your
4 answers
744 views
With x people on board, a South African airline makes a profit of (1104 − 3 x) rands per person for a specific flight.
A. How
4 answers
5,442 views
the cost function C(q) = q3−57q2+1083q+1010 for 0 ≤ q ≤ 50 and a price per unit of $534.
Round your answers to the nearest
2 answers
560 views
At a price of $7.5 per ticket, a musical theater group can fill every seat in their 1550 seat performance hall. For every
2 answers
1,207 views
using the demand function p = 41 − 0.04 q instead of the one given in your book. Round your numeric answers to one decimal
1 answer
646 views
using the demand function p = 41 − 0.04 q instead of the one given in your book. Round your numeric answers to one decimal
1 answer
537 views
N(t) = 650/1+649 e^−0.5 t
(b) How many people will have heard the rumor after 4 hours? After 9 hours? (c) When will half the
4 answers
709 views
for population in billions, where t is years since 1990:
N(t) = 41/1+11 e^−0.1 t (b) According to this model, when will the
1 answer
930 views
The following table gives the percentage, P, of households with a television set that also have a VCR. (Unlike the data in your
4 answers
1,909 views
Year 1960 1970 1980 1990 2000
Rate 39 59 64 89 106 of change (million people per year) Use this data to sketch a graph like that
1 answer
715 views
Time (months) 0 1 2 3 4 5
Rate pollutants are escaping 2 5 7 16 24 34 Use this data to sketch a graph Draw rectangles on this
3 answers
1,805 views
t 3 5 7 9 11 13
V(t) 0 30 23 19 12 6 A. What is the largest number of subdivisions that can be used to estimate the definite
1 answer
349 views
fter a foreign substance is introduced into the blood, the rate at which antibodies are made is modeled by
f(t) = 27 t/8 t^2 + 3
4 answers
925 views
using the following information in place of that in the book. The machine earns the company revenue at a continuous rate of
1 answer
770 views
Suppose that the machinery in question costs $104000 and earns profit at a continuous rate of $69000 per year. Use an interest
4 answers
3,149 views
Find the integral by substitution
∫ [(16 x3)/(x4 + 5)] dx ∫[ 4 x/(√{x2 + 3})] dx ∫ 8 x2 e4 x3 +7 dx PLEASE help with all
1 answer
454 views
Use the Fundamental Theorem of Calculus to find the area of the region bounded by the x-axis and the graph of y = 4 x3 − 4 x.
A
1 answer
915 views
Choose the equations which correctly describe the dissolution of a compound into water.
a) CaBr2(s)-> Ca2+(aq) + Br2(l) b) sodium
6 answers
651 views
A vending machine dispenses coffee into an eight-ounce cup. The amount of coffee dispensed into the cup is normally distributed
3 answers
616 views
what is the function of the alveoli in the lungs????
2 answers
618 views
Why are there so many villi and air sacs?
2 answers
963 views
why is high blood pressure called the "silent killer"?
What might happen if you have a high blood pressure?
3 answers
357 views
why is high blood pressure called the "silent killer"?
What might happen if you have a high blood pressure?
3 answers
545 views
What might happen if you have a high blood pressure????
1 answer
370 views
what did the famous poet, carl sandburg believe????
-what did he give?
1 answer
375 views
What goods were found in a typical aztec marketplace????
1 answer
396 views
How do you convert minutes to hours? i have to convert 10 min into hours. Is it 10/60?
4 answers
341 views
What does a sharp shadow tell us about the way light travels?
2 answers
531 views
whyis frosted glass often used for bathroom windows instead of clear glass or solid wall?
3 answers
561 views
A system contains liquid water. The water freezes. What is the sign of q for the system for this phase change?
1 answer
416 views
Light relects off a mirror. Light reflects off the white surface of a ceiling/wall. Why can you see images in a mirror but not
2 answers
1,021 views
light reflects off a mirror. light reflects off the white surface of a ceiling or wall. why can you see images in amirror but
3 answers
638 views
what is the lowest common multiple for 3, 5 and 6?
4 answers
544 views
When Montezuma sent emmisaries with gifts to Cortes, how did they converse? they did not have Dona MArina (now known as La
4 answers
449 views
what was the clothing of the Aztec god, Quetzacoatl?
4 answers
923 views
what was the clothing of the Aztec god, Quetzacoatl? like you know when every year or so the aztec would choose 1 person to
2 answers
512 views
what was the date that the Spanish conquered the aztecs???
1 answer
439 views
what date did the spanish escape from tenochtitlan and then were defeated?
1 answer
372 views
2secx= 3cscx
1 answer
402 views
Sulfur burns in oxygen in two steps:
i.S(s) + O2(g) ->SO2(g) change of Heat=-297kJ ii. 2SO2(g) + O2(g)->2SO3(g) change of
2 answers
813 views
Which of the following ions is paramagnetic in the ground state:
Na+ Zn+2 Ti+2 Sr+2
3 answers
1,687 views
Name two other factors besides latitude that influence japans climate?
and what major ocean currents affect japan
5 answers
820 views
what is 400% and 40% as a decimal???
1 answer
255 views
and what is 4% and 0.4% as a decimal?
1 answer
299 views
Which radiation causes cancer? I think it is UV radiation, but I'm not sure.
Also, A wave goes up and down 5 times in 10 seconds.
1 answer
392 views
Which radiation causes cancer? I think it is UV radiation, but I'm not sure.
Also, A wave goes up and down 5 times in 10 seconds.
1 answer
398 views
"Big Girls Don't Cry" Rebecca Traister
How does Traister define feminism? Would Hillary Clinton count as a feminist according to
1 answer
368 views
My question is:
WRite the percent as a fraction and as a decimal. 0.06% I don't know how many places I need to move that decimal
3 answers
1,004 views
Im just a little confused on how to answer this question.
A ball bounced 64% of the height from which it was dropped. The bounce
5 answers
1,772 views
PRessure is measured in Pascals (Pa). What combination of units is the same as a Pascal?
and When you exert a force on a fluid in
2 answers
558 views
Which form of conjugation would I use for the following? Like would I use the tu, vous, nous, il, elle, etc. form for which one?
1 answer
435 views
How many moles of precipitate were recovered from BaCro4?
3 answers
362 views
I have a Final Exam in Math tomorrow, and as I was going over my notes, I saw a question like this:
Simplify 6(3-4)-7(-2) How do
2 answers
554 views
Hi I need major help with these question, if you can help me thank you:
1. Critical reading gives us a rational basis for
3 answers
377 views
No se nombrar este compuesto lo necesti urgente no lo encuentro en ningun lado es: 2RbBr(s) como se llama?
3 answers
106 views
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