# Posts by Mark

Total # Posts: 1,619

**Chem**

How many moles of copper sulfate, CuSO4 are in a o.671 g sample? How do I start on this?

**Chem**

So the charge for the tartrate anion is -2......But is it possible for me to figure that out with the formula itself? Or is it something that I have to look up.....I saw the link...

**Chem**

What is the formula mass in amu of KNaC4H4O6 *4H2O Is it 282.09 amu? What is the charge on the tartrate anion? How do I do this?

**prefix and suffix**

when you_________ somthing you give it beuty im in 6th grade answer fast please

**Math- consecutive intigers**

500000000 * 5555555=?

**Chemistry**

How much volume in liters will 100.0 grams of oxygen occupy at 100 degrees celcius and 100 atm pressure?

**chem**

delta T = Kf*molality Plug in 5.00 C for delta T, 1.86 for Kf and calculate molality. Then molality x kg solvent x molar mass = grams. You know molality, kg solvent, and molar mass. Calculate grams. molar mass? where did u got the molar mass from ?

**chem**

delta T = Kf*molality Plug in 5.00 C for delta T, 1.86 for Kf and calculate molality. Then molality x kg solvent x molar mass = grams. You know molality, kg solvent, and molar mass. Calculate grams. molar mass? where did u got the molar mass from ?

**chem**

How many moles of ethylene glycol must be dissolved in 500 g of water (Kf = 1.86) to lower the freezing point to -5.00 0C?

**math**

Consider the following binomials. A=(x^2+5x) B=(6x+30) Part 1: Factor each binomial by finding the GCF. Then, add the two factored binomials to make a single expression. Part 2: Now add the original forms of binomial A and B together to make a trinomial. Factor the trinomial. ...

**math**

Consider the following binomials. A=(x^2+5x) B=(6x+30) Part 1: Factor each binomial by finding the GCF. Then, add the two factored binomials to make a single expression. Part 2: Now add the original forms of binomial A and B together to make a trinomial. Factor the trinomial. ...

**math**

When a figure is drawn in quadrant 2, and you reflect it over the x axis, do you reflect in quadrant 1 or four? I think you reflect it in quadrant 4. Also, where would you reflect it over the x axis when the original figure is in quadrant 1? And y axis?

**math**

Consider the following binomials. A=(x^2+5x) B=(6x+30) Part 1: Factor each binomial by finding the GCF. Then, add the two factored binomials to make a single expression. Part 2: Now add the original forms of binomial A and B together to make a trinomial. Factor the trinomial. ...

**math**

Simplify the expression 6x x 2x^3 x 3x^2y^2/3x^3 x x^4y. I'm confused. The only thing I did was simplify 3x^2y^2/3x^3 to x^1y^2. I need help with the problem.

**math**

When a figure is drawn in quadrant 2, and you reflect it over the x axis, do you reflect in quadrant 1 or four?

**math**

The old lion cage at the zoo was a square, with sides x meters long. For the part of the zoo's 50 birthday celecration, the zoo expanded the length and width. The expression for the total area of the new cage is (x^2+18x+81) square meters. Part 1:Robert thinks that the ...

**math**

So, do you add the product to 32.25? If so, I rounded the sales tax to 2.34 and added 2.34 to 32.25 and I got 34.59.

**math**

Sneakers were on sale for 25% off their original price. Lola bought a pair of sneakers that had an original price of $43. She also paid a slaes tax 7.25% on the sale price of the sneakers. How much did Lola pay for the pair of sneakers? Round to the nearest cent. So far, I ...

**math**

Damien sets up a bucket to catch raindrops. The bucket can hold only 1 gallon. If each raindrop is made up of about 1/90 fluid ounceof water, how many raindrops will the bucket be able to hold? I need help with this question. I know that 1 gallon=128 fluid ounces. I need a ...

**English**

Thanks, I have read it through, it just doesn't all connect so easily for me. I get that the conversation with his mom is important and all, but I don't necessarily see why all the other conversations with people from the Iliad made him learn a lesson. Blech. My brain ...

**English**

The Odyssey By Homer -- Book 11 What lesson does Odysseus learn about himself? How has it strengthened his resolve to return to Ithaka?

**Earth science**

a fault is observed in a road cut, but there is no obvious rock units to correlate on either side of the fault to determine relative movement. How might you determine or even infer whether the hanging wall has moved up or down relative to the footwall

**Microeconomics**

Consider a competitive firm that produces tomatoes. The total fixed costs are $10 and TVC is related to output according to the followin scheduele Quantity TVC 0 0 1 45 2 85 3 120 4 150 5 170 1)Compute ATC and MC 2) What is quantity if P=40 3)what is quantity if P=30 4)What is...

**Research Paper**

My topic was Jim Crow Laws. I have to write a 5 page research paper. ANY criticism would help. This my first one so its pobably very bad. Could you reveiew my first paragraph and my thesis statement: In 1890, a new Louisiana law required railroads to provide “equal but ...

**calculus**

is (x)/(x^2-9) an even or an odd function?

**chemistry**

Rank the following compounds in order of increasing acid strength (1 = weakest, 4 = strongest) HClO HClO3 HClO2 HClO4

**chemistry...**

ah please ignore, i got it!!

**chemistry...**

thanks for the last help, i got the right answer!! i got this wrong... (answer is supposed to be 0.165 but i put 0.0652) A sample of Na2CO3 weighing 0.2863 g is dissolved in 50 mL of water and an endpoint is reached when 32.83 mL of HClO4 has been added. Calculate the molarity...

**chemistry**

ahhh im confused!! Calculate the pH of a solution formed by mixing 372 mL of a solution containing 4.4 x 10-6 M NaOH with 286 mL of 6.0 x 10-2 M NaOH. Report your answer to 2 decimal places.

**chem**

is a formate ion (HCOO-) an acid or a base? how would you know?

**chemistry**

thank you!!

**chemistry**

An aqueous solution of ethanol is 3.05 M in ethanol, CH3CH2OH. Calculate the mole fraction of ethanol if the density of the solution is 0.964 g mL-1.

**algebra**

what if it was something like: 2.038x = 5.381x?

**algebra**

x = 2.077(0.481x) x = 0.999x how would i solve for x?

**religion**

Frankfurter puts together several accounts of monstrous ritual. Account for the similarities between these accounts. HELP

**Math please help me**

9/24

**Physics**

A solid cylinder (radius = 0.150 m, height = 0.120 m) has a mass of 7.00 kg. This cylinder is floating in water. Then oil ( = 725 kg/m3) is poured on top of the water until the situation shown in the drawing results. How much of the height of the cylinder is in the oil?

**religion--verse explaining**

i think it is more profitable to look at all the attributes of spirtual malpractise in given cultures, and when we do so we find a set of oppositions that maintains remarkable consistency as a set, despite variations between cultures. can someone explain what this verse means...

**Religion--thesis statement help!**

Majority is where evil exists and the individual is distinctly evil, and minority is when evil does not exist, rather the actions one does can be considered evil through explanation. i need to write a strong thesis statement agreeing with the minority view

**religion**

Unruly Evil by david pocock can anyone explain to me what is being said in this text. I do not understand it at all, and our prof will not help us understand it either. I need help majorily!

**Religion**

Unruly evil by David Pocok - what does pocock mean by unruly evil? - for pocock, how is evil related to order and to explicability

**biology**

how does cellulose adapt to its function!? i think it has something to do with there being a strong cell wall. however im am unsure. please could somebody help me thanks

**Geography**

Do you feel suburbia is a sustainable way of life?

**Physics**

Cheers bob thats a great piece of kit. Mark

**Physics**

Hi can someone advise whether my methodology is right on this with a potential energy of 589 kJ per tonne, 100 tonnes of water per second are delivered to a turbine. Assuming all the potential energy of this water is used to drive the turbine how much power will be delivered ...

**Physics**

Thanks Bob I had assumed a uk tonne at 1016 kg Mark

**Physics**

Hi Can someone check and advise on this potential energy of 2 tonne of water held 120m above a flood plain by a dam. potential energy = 2032 kg (2 Tonne) x 9.81 ms x 120m pe = 2392070.4 Joules Convert to kilojoules 2392070.4 / 1000 pe = 2392 kJ (To four significant figures) ...

**Computers**

Sort an array of ten 30 character items into ascending order of surname. Each line contains a name in the form e.g. Mr J Smith, Dr John R Smith or John Smith. There are no field or record delimiters, qualifications, suffixes, double-barrelled names or similar complications. ...

**Mathematics**

Four people are standing in a line, each facing forwards. They are not allowed to move, turn their heads or speak (except to give the answer). The fourth is behind a partition wall and can neither see nor be seen by the other candidates. Each is wearing a backpack of unknown ...

**Science**

How do I tell how many electrons are in an element?

**math**

24

**chemistry**

how many moles of x in 33.3g of substance?

**Pre-Algebra**

My stab at it... A+B=91 (Combined age) A=2B B=91-A (Age of Person B now) Substituting: A=2(91-A) = 60.66 or 60 2/3 60.66+B=91 B=30.33 (or 30 1/3)

**intermediate algebra**

the sum of a number and one

**Ethic**

Thanks for your inputs, and thinking more into the question, this is more on ethics. Can you give me some more reasoning on the ethics point of view?

**Ethic**

Business invest time to attract customers, but some customers are simply not worth having. So some business think that they should fire the customers they lose money on. -Is it acceptable to fire customers who cost you money? -Is it acceptable for the company to focus efforts ...

**american history [about presidents]**

why were their 3 presidential candidates in the election of 1812.. i think that is the year. Whenever roosevelt was running with taft. please help me out with the answer as to why there were 3 parties..

**Advertising question, please help!!!!!!!!!!!!!!**

ok, that will help me with my proofs, but I need ideas on what points to use...

**Advertising question, please help!!!!!!!!!!!!!!**

How can I prove that advertising GREATLY influences in shaping consumer's purchase decision? So far, I have peer pressure, discounts...I'm not sure if they're even strong ideas :?

**math**

Hi how would i go about solving this. It's fraction + fracion over fraction+fraction -4/5+3/5 __________ 1/3+1/5

**irish**

what is the irish word for homework

**a1 nvq**

How would you encourage candidates who have different levels of confidence and experience to take an active part in their assessments?

**physics**

number 1 is d and number 2 is a

**social studies**

The oldest wonder was built around 2550 B.C. what is it?

**Critical Thinking**

why are you asking for help. Read the assignment and you should be able to come to your own conclusions instead of taking the easy way out. What are you learning if you have to ask for answers? Is this an online course?

**Math**

Hi, how would we solve a problem like this? The path of the ball for many golf shots can be modelled by a quadratic function. The path of a golf ball hit at an agle of about 10 degrees to the horizontal can be modelled by the function : h= -0.002d^2+0.4d where h is the height ...

**Chemistry**

1.Arrange the following oxides in the order of increasing basicity. -Al2O3 -B2O3 -CaO -Ga2O3 -In2O3 -RaO 2.Arrange the following oxides in the order of most basic to most acidic. -Al2O3 -Cl2O7 -Cs2O -N2O5 -Na2O -P2O5 -SO3

**calculus**

The base of a solid is a circle of radius = 4 Find the exact volume of this solid if the cross sections perpendicular to a given axis are equilateral right triangles. The equation of the circle is: x^2 + y^2 = 16 I have the area of the triangle (1/2bh) to be equal to 2sqrt(12...

**calculus**

The base of a solid is a circle of radius = 4 Find the exact volume of this solid if the cross sections perpendicular to a given axis are equilateral right triangles. I have the area of the triangle (1/2bh) to be equal to 2sqrt(12) (1/2 * 4 * sqrt12) I don't know what to ...

**Math**

I'm trying to use DeMoirre's Theorem to compute and express this in rectangular form. Here's the expression: (-1 + i)^5 The ^ means it's to that power. It's to the fifth power. Any help would be appreciated. Figured it out myself. 4 - 4i is the answer.

**Social Studies**

What 20th-century conflict was dubbed the "forgotten war" despite 54,246 U.S. deaths? That would be Korea... this is an excellent site: (Broken Link Removed) It shou be the The Korean War. You might want to double check.

**Math**

Below are the grades of 50 students on a marketing test.

**Math**

11. (3 pts) The results of a survey for an airline are shown below Traveler

**Physics**

First, you should have appreciated that there is no such thing as negative work (you can't "undo" work by doing work in a different direction). This immediately eliminates answers b and c. The remaining answers rely on your clear understanding of the definition/...

**Math**

In an experiment, a pair of dice is rolled and the total number of points observed. (a) List the elements of the sample space (b) If A = { 2, 3, 4, 7, 8, 9, 10} and B = {4, 5, 6, 7, 8} list the outcomes which comprise each of the following events and also express the events in...

**PLEASE HELP SOLVE RIDDLE**

What is odorless, colorless, weightless. When put in a drum it makes it lighter.

**PLEASE HELP SOLVE RIDDLE**

A Stalagmite

**chemistry - kinetics**

The activation energy for the isomerization of methyl isonitrile is 160 kJ/mol. Calculate the fraction of methyl isonitrile molecules that have an energy of 160 or greater at 500 K? 510 K? What is the ratio of the fraction at 510K to that at 500K? I missed this lesson today ...

**Science**

An archaeologist finds an old piece of wood. The carbon-12 to carbon-14 ratio 1/16 the ratio measured in a newly fallen tree. Estimate the age of the piece of wood

**math**

(2w-1)^2=4(w-3)^2 Expand both sides of the equation, then simplify: 4w^1 - 4w + 1 = 4w^2 - 24w + 36 ...... ..... w = 7/4

**Math**

What is the product of 5x^2 and 3x^5? exponents add, so 15x7

**Math**

The expression (3x+4) (2x-6) is equavalent to? 3x(2x-6)+4(2x-6) multipy out brackets to give: 6x^2 - 18x + 8x - 24 collect like terms to get: 6x^2 - 10x - 24

**AP U.S. History 1920's immigration**

Fu(k schooll

**science**

Having a hard time understanding "representative particles". ie. which are atoms, compounds etc. For example, what is the representative particle for sodium fluoride? carbon monoxide? Atoms are the smallest unit of an element. Molecules are composed of two or more ...

**Chemistry and Balancing**

Mr Pursley. i was wondering if you would be kind enough to explain to me the process of balancing equations I undestand some of the rules but I continue, to make simple mistakes. Would you kindly offer some assistance please, via email. To help me get through this plateau. ...

**ETH123**

What are the most significant similarities between the Chinese American and Japanese American [cultural] experiences? What are the differences? Please refer to this post, recently answered: http://www.jiskha.com/display.cgi?id=1170193455 =)

**SCIENCE**

What type of bonding holds the compound, sodium cyanide, together? The CN bond is covalent. The Na to CN bond is, in most minds, an ionic bond. The electronegativity of C is about 2.1 and that of Na is about 1; therefore, with a difference of about 1 it is polar covalent. ...

**CHEMISTRY**

Given assumed valencies: H=1, N=3, & C=4 i am now required to draw the structural formulae of HYDROGEN CYANIDE and CYANOGEN. H:C:::N is the Lewis electron dot structure. If you want to use "sticks" as a bond instead of two electrons, one stick stands for two ...

**SCIENCE CHECK**

Pleas check the following for me... "A drop of oil (vol 0.051cm ) is released on to the surface of a pond where it covesr an area of 40cm2. Assume that the oil film has a uniform thickness equal to the diameter of an oil molecule. Calculate the diameter of an oil molecule...

**chemistry**

0.0351 is the actual answer.

**CHEMISTRY**

I am given a list of apparatus, liquids & solids and am trying to convert aluminium selenide from solid to geseous states does the following sound correct?... Aluminum selenide (in the round-bottomed flask) reacts with water (coming from addition funnel which is connected via ...

**CHEMISTRY**

What is the true meaning of dimerize and trimerize - neither of these words are found in any dictionary and hence, are not actually in use: scientific jargon perhaps, but not proper English. Also, if it is in proper use, in the UK, is it spelt dimerise & trimerise ending in SE...

**Chemistry**

How would I explain how I arrived at the following EF in words?

**help me unscramble this word**

G E D Y R A A

**eth**

research to determine if the group colonized or if it immigrated to the United States. Did the group face prejudice, segregation, racism or any combination of the three? If so, how and why? Include your research findings in your essay. You may search through chapters of the ...

**eth**

Imagine yourself as a current member of that group, and consider the question, “Would I want to immigrate to the United States, and why?” Think about what opinion you would have of the immigration process, including naturalization, the costs, fingerprinting, etc. ...

**eth**

Should United States government policy favor certain kinds of immigrants? o Should [citizenship] preference be given to the neediest applicants? The most talented? The most oppressed? The richest? o Should applications from certain countries be given priority? Please let us ...

**Science**

What are the formulas for lithium bromide? http://www.webelements.com/webelements/compounds/text/Li/Br1Li1-7550358.html where can i find the formula for cupric nitride,and magnesium chloride also. and what are the formulas for the compounds formed by Fe2+,Cl- how do you figure...

**Pre-Calculus**

One model for the population P of bacteria in a sample after t days is given by P(t) = 1000 - 19.75t + 20t² - 1/3t³ Whoops accidently hit post question a)what type of function is P(t) b)when is the bacteria population increasing c) When is it decreasing

**ANALOGIES**

i lied i don't know