Gemma

This page lists questions and answers that were posted by visitors named Gemma.

Questions

The following questions were asked by visitors named Gemma.

Is melting endothermic or exothermic? Things that are melting are taking on heat, endothermic Would freezing be the same? No, of course not. If melting is endothermic, then freezing must be exothermic. Believe it or not, and I know it sounds goofy, freezi...

I know that Ununhexium is in period 7, group 16. What evidence would be able to support this? Here is a web site for an on-line periodic table. Look for Uun, element #116. That will give you the info you need. http://www.webelements.com/

GIVE THE EMPIRICAL FORMULAE OF THE HIGHEST HYDRIDE AND HIGHEST FLUORIDE OF UNUNHEXIUM, EXPLAINING HOW YOU ARRIVED AT YOUR CONCLUSIONS Here is the web site for a very good periodic table. Look for element #116, Uuh. Elements in the periodic table have simi...

suppose that ununhexium undergoes a succession of a-decays reactions. What isotype would be the final product? how did you arrive at this answer? and is it a lanthanide, actinide, transition or typical element? See the post above as a response to bertie....

A 0.21 g of Sulfuris acid is dissolved completely in sufficient water to make 0.25 litre of final solution. Calculate the hydrogen ion concentration (in mol 1 -1) in this solution. Give your answer in scientific notation to an appropriate number of signif...

Any help with s103 06 QUESTION 5?? You would do better, I think, to post your question and let everyone try to help rather than using only students taking the course.

which action would result in the more (financially) valuable product: taking one proton from each nucleus in a sample of gold or adding one proton to each gold nucleus? Taking a proton (p) away 79 AU - 1p = atomic number 78?? Adding a Proton Au79 + 1p = ?...

what is the pH of Sulphuric acid? It depends upon the molarity. pH = -log(H<sup>+</sup>) -log = ? pH = -log(H^+) find (H^+), punch that into your calculator, change the sign to minus, then find the "log" key and punch that. That will be the pH.

When an acid and an alcohol react does it produce an ester? If so ehat type of reaction is this? I call it esterification. It is also an elimination reaction in that water is eliminated.

what is the meaning of a glycosidic C-1 to C-4 linkage? Since this is not my area of expertise, I searched Google under the key words "<I>glycosidic C-1 to C-4 linkage</I>" to get these possible sources: http://scholar.google.com/scholar?q=glycosidic+C-1+...

I am writing an essay on the subject of, 'The metabolism of green plant cells in relation to energy exchange process.' Can anyone advise of key ideas to include please? This is a very, very complicated subject. Look here: http://en.wikipedia.org/wiki/Meta...

what differences would there be in the product cells at telephose II of meiosis if there had been one crossing over at a position halfway between the Huntington disease gene and the centromere.

Gametes produced in the process of meiosis in humans (chromosome 4)has a long and short arm the short arm has the gene for Huntington's (H) attached and the long arm the gene for Red hair (R) state the differences in the product cells at telophase II if a...

What are the four earth systems? and how do they interact with eachother? Lithosphere, Biosphere, Atmosphere, and Hydrosphere. They operate in an integrated fashion. I recommend you cite some specific interactions. all of the systems work together by air...

where does banksy come from

A long-distance call using DEC costs 20 cents for the first minute and 16 cents for each additional minute. The same call, placed on LCS, costs 19 cents for the first minute and 18 cents for each additional minute. For what length of phone calls is DEC le...

Mandi can be paid in one of two ways: Plan A-- A salary of $400 per month, plus a commission of 8% gross sales; or Plan B-- A salary of $610 per month, plus a commission of 5% of gross sales. For what amount of gross sales should Mandi select Plan A? I ha...

(x+3/4)^2 = 17/16 My teacher taught us a square root method, but I am confused with it on this one! I would prefer if you show me using square roots, but if you have another way, please help too! Thank you!

A turbo-jet flies 50 mph faster than a super-prop plane. If a turbo-jet goes 2000 miles in 3 hours less time than it takes the super-prop to go 2800 miles, find the speed of each plane. I do not understand how to do this at all. Please explain as well as...

Do you know a site with some practice problems for a quadratic formula (ax^2 + bx + c) for my test tomorrow? Thank you so much!

What is the length of the hypotenuse of a right triangle with legs of 5 and 12 units? What is the "hypotenuse" and "legs" of a triangle? Thanks!

Do you hyphenate 3D or leave it one word?

give 2 legal obilgations of manufacurers and employers with regards to cleaning agents

A student completes a titration by adding 12.0 milliliters of NaOH(aq) of unknown concentration to 16.0 milliliters of 0.15 M HCl(aq). What is the molar concentration of the NaOH(aq)?

A biomass power station burns forestry residue which has 2000 ppm potassium in it and produces 2% ash by weight (think Ive worded that right). I need to find the fraction of K2O in the ash, but only the fraction of K in the fuel as a whole is given.

standard enthalpies of formation H20(l) = -286 LiOH(s) = -487 standard enthalpies of solution for LiOH(s) to split into it's ions is 21 all values are in KJmol-1 Use the data given to calculate a value for the enthalpy change for the reaction of lithium w...

is there anyway that a diagram or something can be drawn or pasted into the question box for a math problem?

Given circle A with circumference 20 pi and the length of arc KD equal to 10/3 pi. Find the area of the shaded region. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Is there any way I can post a diagram?

Pt present for suture removal. sutures removed and slight oozing occurs in midsection of wound. wound dressed and pt advised to aply antibaterial cream daily. retn in 4 to 5 days for final check(PF HX/PX SF/MDM...WHAT IS THE OV

2nd question, pt present for PO check of head wound Pariental area healed well. RTO prn ( pf hx/px/sf/mdm) what is the code...

Calculate the concentration of nitrate ions, NO3- , in mol dm-3, of a solution made by dissolving 2.5000 g of ferric nitrate nonahydrate in water to give 2.000 L of solution.

calculate the mass of iron in 2.5000g of feric nitrate nonahydrate Fe(NO3)3.9H2O

Preform dilution calculations for 10 ml of 2 M stock solution. Molecular weight for the component is 48.6 g / mol

Jean has a total of 24 coins consisting of just quarters and nickels. The coins total $3.40. How many of them are quarters?

Whats my rule Input 140. Output. 22 Input 100. Output. 62 Input. 91. Output. 71 So if the input is 10 what is the output?

were there any similarities between the roman emperors nero and caligula, and the roman general mark antony?

P4 (g) + 3O2 (g) <-> P4O6(s) At a particular temperature, Keq = 4.6. If [P4O6] at this temperature is 1.2M, calculate the concentration of P4 and O2 I'd rather have someone tell me how to do it, so I can do it myself since it's in preparation for an exam.

A point P(x,y) moves so that the line joining P to A(9,-5) is perpendicular to B(4,5). Derive an equation specifying the locus of P.

Correlate the concentrations of solutions in the cytosol to the concentration of the solutions outside of the cell during Osmosis

When doing jump rope activities what type of stretch is important to add to your warm-up? A) Calf stretches B) Abdominal twists C) Bicep Curls D) Quad stretches

Answers

The following answers were posted by visitors named Gemma.

Thank you for your help!

first of all you would need to find out the number of moles in solution using moles = mass/Mr Mr of AgNO3 = 108+14+(16x3) = 170 moles = 1.70g/170 = 0.01 Then you can use the formula: concentration = moles/volume(dm3) = 0.01/0.250 = 0.04moldm-3 hope this h...

You need to know the formula for silver nitrate which is AgNO3 Then you work out the MR of silver nitrate = 108+14+(16x3) = 170 Then you work out the MR of the nitrogen contained in silver nitrate. There is just one nitrogen atom so it would be 14. Then y...

Use the formula moles = mass/Mr Mr of sodium = 23 Rearrange the equation to make mass the subject. mass = moles x Mr and put in the numbers... mass = 2 x 23 = 46g Hope this helps

Electrostatic bonding forces relates to covalent compounds and the shared pair of electrons, it is when the nucleus of one atom attracts the electron of another atom and the electrons become shared between the two atoms. All you need to do now is pick out...

The first step would be to calculate the MR's of each substance so you could get the reacting masses so: 3H2 = (3 x 2 x 1) = 6 N2 = 14 x 2 = 28 2NH3 = (2 x 14) + (2 x 3 x 1) = 34 so in theory you need 6litres of H2 and 28litres of N2 to produce 34litres o...

Not sure about the KBr and the sand but iron is magnetic so that can be removed with a magnet. Sorry I cannot answer fully.

Molarity = moles/volume (dm3) so you need to convert your volume into dm3. 1dm3 = 1000ml so your equation should be; molarity = 0.56/0.100 = 5.6moldm-3

The shaded region is between IKD THere are to lnes opposite of each other. Then to parallel lines through those lines. Thers is a circle in the middle with a circumference of 20 pi. THen there is a triangle that connected to the outer lines to the right....

diagnose is 681.11 E/M 99202, I&D great toe 10060 modifier TA, Excision great toe 11750 modifier TA, and 99024 PO check..

I beieve is Gumbo

I did using my materials but I get comfuse do I code twice.

How do I find mL?

Is that correry?

Thx so much I am passing because of this website

thxs woah dude i got an 100% thank you sooo much:)

yeah i think it is d :) i have a A+ in science.

ok i only got a 67 i got one wrong with nikki so i think unicorns is right

ok but what about part two

omg thank you a normal tree i got 100%

thx nikki H it help when you have someone giving you the answers thx :D

oh yes is wrong i got 7/9 like wow but thx

i have 5 quistions

thx kya i got 100%

what are the answers for the whole test

thank you sid.V you rock. oh and plus everyone got the answers off of sid.V so you guys sould be saying thank you to sid.V

i need to show the work pls help mrs,sue

look i just need help.

just tell me the right answers

yea i think it is D/ 6x5+6x3

X = 20! Easy my dude

15! I have the same homework-

Answer the following

Find the arc length and area of a sector and a circle if the arc measure is 80• and the length of the radius is 6 cm.