If a supplement as 500mg of elemental calcium how much does your body absorb?
Q. If a supplement as 500mg of elemental calcium how much does your body absorb?
Asked by Sweet Thang - Tue Apr 1 14:04:47 2008 - - 2 Answers - 0 Comments

A. This is a hard question to answer. I cannot say you will absorb 400mg of it or perhaps 250mg. Absorption is affected by calcium status, vit. D status, age, pregnancy and the calcium content of meals. As the amount of Ca++ increases, the efficiency of absorption decreases. The amount of vit. D present affects absorption. And in adulthood absorption begins to decline to 15-20% and declines even more as we get older. You might absorb 60% of a 500mg supplement whereas I might absorb 80%. And if you skipped vit. D on one day and stayed indoors, you might absorb even less than 60%. There are too many variables to give one single answer.
Answered by TweetyBird - Tue Apr 1 14:25:19 2008

reaction of calcium with elemental chlorine?
Q. The reaction of calcium with elemental chlorine yields calcium chloride. Write a balanced chemical equation for this reaction. a.Ca(s) + Cl2(g) CaCl2(s) b.4 Ca(s) + Cl2(g) 2 Ca2Cl(s) c.Ca(s) + Cl2(g) CaCl(s) + Cl(g) d.Ca(s) + 2 Cl2(g) CaCl4(s) e.2 Ca(s) + Cl2(g) 2 CaCl(s)
Asked by kallystarr - Wed May 30 11:41:32 2007 - - 1 Answers - 0 Comments

A. a) Ca(s) + Cl2(g) --> CaCl2(s)
Answered by Dr Dave P - Wed May 30 11:44:02 2007

Chemistry help! Explanations of bonding, properties of substances and elemental composition.?
Q. I'm sorry there's quite a few questions but i have had a go at them but i want to know what the answers are as there is no markscheme. Thankyou! 1) What form of bonding would you expect between barium and iodine ions in barium iodide? Give a brief explanation of your answer. Now i know the answer is ionic bonding, but why specifically? Is it something to do with their respective electronegativity?? 2) The rubidium-strontium dating technique is based on the beta decay of isotope rubidium 87. Write a nuclear equation for this reaction, identifying the parent isotope and the daughter isotope. 3) Refering to a diagram (that i draw) showing the arrangement of calcium ions and carbonate ions in a two dimensional section of calcite, explain… [cont.]
Asked by Kayleigh B - Wed Jan 14 14:18:09 2009 - - 2 Answers - 0 Comments

A. 1) ionic bonding. yes their electronegativity and electropositivity. barium is 2+ and iodine is 1-. barium will gain 2 electrons. one each from the iodine so it'll need 2 iodine as the iodine will need to discharge an electron. 2) 89 Rb === 89 Sr + 0e 37 38 1 3) calcite is a crystalline substance. they have an arrangement similar to that of sodium chloride where each anion is bordered by cations. like charges do not come in contact with each other. when pressure is applied to the lattice and the anions come in contact with anions and cations with cations they repel each other and the structure shatters. hence the compound being brittle. 4) quarts is silicon dioxide and felspar is potassium aliminium sillicate. these are… [cont.]
Answered by kandie - Wed Jan 14 14:42:12 2009

HELP PLZ!! I need to make a Structural Diagram for Potassium Chloride, Calcium Oxide, and Aluminum SulfideHELP
Q. I need to do as the question says.. and I have nooo clueee howww.. so plz show me how to do it for those elemental compounds!! and Iz thANkz yoOOou mUCh!! x-ialol-x ps. I do choose best answer.. if it truly is.. so please make it the best answer!!
Asked by ialol - Thu May 15 00:04:41 2008 - - 1 Answers - 0 Comments

A. 1) :K::Cl: 2) :Ca::O: 3) ::S::Al::S::Al::S:: hope dis helps
Answered by right_512 - Thu May 15 00:39:04 2008

how much in this tablet? ?
Q. a calcium tablet label says: calcium carbonate 1000mg (providing elemental calcium 400mg) does this mean its got 1000mg of calcium of 400mg?
Asked by Lisa - Mon Oct 13 02:42:12 2008 - - 3 Answers - 0 Comments

A. Elemental calcium is a term used in dietary supplement part referring to calcium form available for human body.A pill supplying calcium will be in the form of a calcium compound like carbonate which is 40% calcium by weight.Thus a 1000mg.pill of calcium carbonate contains 400mg.of calcium available for useful purposes to human body and the container will indicate each pill has 400mg.of "elemental calcium "So it is the actual calcium in the pill.
Answered by rk s - Mon Oct 13 03:14:30 2008

What should I be getting enough of?
Q. At 19 weeks, how many calories should I be intaking on a daily basis, and how many pounds should I be gaining weekly? Is there a recommended amount of intake of vitamins that I should be aware of? I take a daily prenatal multi-vitamin which consists of: Vitamin A(beta carotene) 2700 I.U., Vitamin C(ascorbic acid) 120mg, Calcium(calcium carbonate) 200mg, Elemental Iron(carbonyl iron) 90mg, Vitamin D3(choleccalciferol) 400 I.U., Vitamin E(al-alpha-tocopheryl acetate) 10 I.U., Vitamin B1(thiamine mononitrate) 3mg, Vitamin B2(roboflavin) 3.4mg, Niacinamide 20mg, Vitamin B6(pyridoxine HCI) 20mg, Folic Acid 1mg, Vitamin B12(cyanocobalamin) 12mcg, Biotin 30mcg, Pantothenic Acid (calcium pantothenate) 6mg, Magnesium (magnesium oxide) 30mg,… [cont.]
Asked by mzsouthernprincess - Thu Dec 14 09:56:50 2006 - - 6 Answers - 0 Comments

A. Go to this site, it is very helpful.Good luck.
Answered by It's a boy - Thu Dec 14 10:01:30 2006

Am i wasting my time with these vitamins? best answer 10 points?
Q. I take One A Day Womens Multi vitamin/ multi mineral supplement i take it every day once (obviously) are these good vitamins? or am i just wasting my money and time if i'm concerned mostly about good skin, hair, and anti-aging? if these aren't good what would be my best most affect vitamin for my needs? thanks! Here are the supplement facts. this goes by amount per serving and the percentages are the daily value. Vitamin A (20% as beta carotene) 2500 IU 50% Vitamin C 60 mg 100% Vitamin D 800 IU 200% Vitamin E 30 IU 100% Vitamin K 25mcg 31% Thiamin (b1) 1.5 mg 100% Riboflavin(b2) 1.7 mg 100% Niacin 10 mg 50% Vitamin b6 2 mg 100% Folic Acid 400 mcg 100% Vitamin b12 6 mcg 100% Biotin 30 mcg 10%… [cont.]
Asked by Sterling - Thu Feb 12 10:38:34 2009 - - 5 Answers - 0 Comments

A. I don't know how good they are in terms of anti-aging, but most multi vitamins are great for the skin and more importantly, for your overall health. Most diets do not include all the vitamins and minerals your body needs on a daily basis. Every doctor I've ever known has always recommended a good one-a-day multi supplement for overall good health. Continue to take your One A Day's, but don't expect miracles. One pill can't be responsible for replacing a healthy diet, and lifestyle.
Answered by Miami Lilly - Thu Feb 12 10:45:07 2009

Diet using nutrients from "One A Day" weight smart advanced tablets.?
Q. Hi, i see how everyone posts that doing a diet requires that you get all the right nutrients and eat atleast 1,500 calories to lose weight. However, i want to use tablets called one a day that gives these nutrients and then eat healthy food to make sure i don't get more than 1,500 calories. Is this a good idea? The supplement facts in one a day is... vitamin a 2500 iu, vitamin c 60 mg, vitamin d 400 iu, vitamin e 30 iu, vitamin k 80 mcg, thiamin b1 1.9 mg, riboflavin b2 2.1mg, niacin 25mg, folic acid 400 mcg, vitamin b12 7.5mcg, pantothenic acid 12.5, calcium (elemental) 200mg, iron 18mg, magnesium 50mg, zinc 15 mg, selenium 70 mcg and coppe and maganese2 mg.oh yea, it also has chromium 200 mcg, guarana blend 180mg and green tea/cayenne… [cont.]
Asked by Goku K - Tue Jan 27 19:17:16 2009 - - 1 Answers - 0 Comments

A. I'm very interested in trying these as well. I was just looking over amazon to see the reviews and some said it worked well and the other said constant nausea and constant puking. I mean everyone's different, but I don't see anything in there that would make you puke. I've tried other diet products before and I didn't feel too many different horrible side effects. I'm sorry this really didn't answer your question. I wish you the best :D
Answered by Zelda - Tue Jan 27 20:16:17 2009

taking a multivitamin , even tho i eat pretty healthly, ok?
Q. im 14, i eat sumwhat healthly, so im sure i get ok vitamins. i wanna start taking teen one a day advantage for him tho. would it hurt at all? would it build up toxins? and if im getting more of vitamins that i need what happens? do you flush them out? here's the ingredents. Vitamin A (20% as beta-carotene) 2500 IU 50% Vitamin C 120 mg 200% Vitamin D 400 IU 100% Vitamin E 30 IU 100% Vitamin K 25 mcg 31% Thiamin (B1) 3.75 mg 250% Riboflavin (B2) 4.25 mg 250% Niacin 30 mg 150% Vitamin B6 5 mg 250% Folic Acid 400 mcg 100% Vitamin B12 15 mcg 250% Biotin 300 mcg 100% Pantothenic Acid 10 mg 100% Calcium (elemental) 200 mg 20% Iron 9 mg 50% Magnesium 100 mg 25% Zinc 15 mg 100% Selenium 20 mcg 29% Copper 2 mg 100% Manganese 2 mg 100%… [cont.]
Asked by George T - Fri Apr 17 17:54:29 2009 - - 1 Answers - 0 Comments

I need these chemical equations Balanced...?
Q. 8. Ammonium chloride, NH4 Cl, reacts w/ calcium hydroxide, Ca(OH)2, to form calcium chloride (CaCI2), ammonia (NH3 ), and water. Write balanced equation for this reaction 9. Zinc reacts w/ hydrochloric acid, HC1, to form zinc chloride, ZnCL2, & hydrogen gas. Write balanced equation for this reaction 10. Fluorine reacts with sodium chloride, NaCI, to form sodium fluoride, NaF, & chlorine. Write the balanced equation for this single-displacement reaction(Hint: Remember that both fluorine & chlorine have two atoms per molecule when they are in elemental form 11. Calcium oxide, CaO, reacts w/ sulfur dioxide to form calcium sulfite, CaSO3 Write the balanced equation for this synthesis reaction 12. In air, calcium sulflte, CaSO3, reacts slowly w/ [cont.]
Asked by truckin_90 - Mon Dec 25 18:19:03 2006 - - 5 Answers - 0 Comments

A. 8.2NH4Cl+Ca(OH)2=CaCl2+2N H3+2H2O 9.Zn+2HCl=ZnCl2+H2 10.2NaCl+F2=2NaF+Cl2 11.CaO+SO2=CaSO3 12.2CaSO3+O2=2CaSO4
Answered by raj - Mon Dec 25 18:42:28 2006

Need an answer quick please?
Q. Give the half reactions and complete reaction for the formation of calcium sulfide from the elemental Ca and S. Thank you!
Asked by CRA - Fri May 29 08:57:21 2009 - - 1 Answers - 0 Comments

HELP HELP HELP only half hour to turn in!!!!!?
Q. 1. What role do producers play in the carbon cycle? (Points: 3) They use carbon dioxide during respiration. They release carbon dioxide during transpiration. They use carbon dioxide for photosynthesis. They release carbon dioxide for photosynthesis. 2. Which of the following are often involved in a biogeochemical cycle? (Points: 3) molecules, living things, and the environment living things molecules the environment 3. The burning of fossil fuels releases which of the following gases into the atmosphere? (Points: 3) oxygen carbon dioxide nitrate nitrogen 4. What element is considered the building block of the structures of all living things? (Points: 3) carbon nitrogen … [cont.]
Asked by Adam - Tue May 19 18:03:39 2009 - - 1 Answers - 0 Comments

did you know that ...?
Q. some calcium with vitamin D tablets contain elemental boron, which is an extremely harmful chemical used to make boric acid. It has been known to cause birth defects in women who are pregnant. There are so many harmful vitamins out there that are not safe its suprising. Being pregnant is really scary.
Asked by pegasis - Fri May 4 13:14:58 2007 - - 3 Answers - 0 Comments

A. And vaccines have mercury in them... Well, those vitamins are not closely monitored by the FDA...if you read the side, it says that the statements haven't even been verified by them. Anyway, get your Vit D from milk.
Answered by Waiting and Wishing - Fri May 4 13:20:18 2007

sum more science questions 30 minutes left!?
Q. Marine organisms such as coral and shellfish have carbon in their bodies in which of the following forms? pure carbon calcium carbonate bicarbonate carbon monoxide Carbon in the bodies of marine organisms often is changed into which of the following forms? clastic sedimentary rock such as sandstone chemical sedimentary rock such as limestone igneous rock such as granite metamorphic rock such as slate Which of the following is the source of energy for the water cycle? volcanic eruptions the sun gravity winds Which of the following statements about the water cycle is true? Organisms in the biosphere do not influence the water cycle. The water cycle only continues during… [cont.]
Asked by shagster - Fri May 1 14:51:01 2009 - - 2 Answers - 0 Comments

A. Calcium Carbonate chemical sedimentary rock the sun plants play a vital role in the H2O cycle Carbon Dioxide evaporation all biochemical cycles
Answered by Emily C - Fri May 1 16:23:08 2009

Ok i need a creative ppls help!!!?
Q. ok i have a project in science and it about elemental superheroes/villains i have to create a name that mixes in with my element ...which is calcium(Ca) i need the most creative names u can think of cuz rite now i got nothing ...eg. for xenon its x factor that was from our book but it doesent give us anything else..thnks for ur help :]
Asked by Courtney - Tue Oct 23 18:39:31 2007 - - 3 Answers - 0 Comments

A. Bones. Calcium makes bones strong.
Answered by Spiritus - Tue Oct 23 19:45:56 2007

Need chemistry help ASAP! (please?)?
Q. I have a huge chemistry packet due in 2 days, and I can't figure out these problems. If you can help, even with just one problem, it would be greatly appreciated! - Elemental Iron is attracted by a magnet but FeCl6 is not. Explain. (Maybe it has something to do with elemental iron being charged?) And I'm not sure how to write the net ionics for the following... (My textbook doesn't have a section dedicated specifically to net ionics) -A small piece of calcium metal is added to hot distilled water. -Sulfur dioxide gas is bubbled into distilled water. -A solution of iron(II) chloride is added to an acidified solution of sodium dichromate.
Asked by rachel z - Wed Jan 3 01:25:57 2007 - - 2 Answers - 0 Comments

A. -A small piece of calcium metal is added to hot distilled water. Ca + 2H2O --> Ca(OH)2 + H2 for details
Answered by Cute - Wed Jan 3 11:27:59 2007

prenatal vitamins and iron pills??
Q. My doctor prescribed me prenatal vitamins and iron pills when i was 12 weeks...but i have been taking the prenatal vitamins but i don't take the iron pills. I think there is enough iron in the prenatal vitamins. The doctor never gave me a reason why i was iron pills and he prescribed them to me before i got my blood taken. do you think this is weird? here is a link to what the iron pills are this is whats it my iron pill Iron Ferrochel * (elemental iron)...70 mg Ferrous fumarate (elemental iron)...81 mg Succinic acid...150 mg Vitamin C (ascorbic acid)...140 mg Vitamin C as Ester-C Ascorbic acid (as calcium ascorbate)...60 mg Threonic acid (as calcium threonate)...0.8 mg Folic acid, USP...1 mg Vitamin B12 (cyanoco [cont.]
Asked by baby boy born jan.30th 2009 - Thu Aug 21 10:15:01 2008 - - 4 Answers - 0 Comments

A. Not weird, from my experience. I had to take the iron pills in addition to my prenatals, and my doctor suggested I eat iron rich foods as well. Total cereal was a good option they gave me, I used to eat it for breakfast almost every morning. Everything definitely helped, but even if it does you need to continue with it until after your pregnancy. My iron levels were fine until after I had my baby, then they dropped again and I had to continue the iron pills for a few more days.
Answered by angelbaby - Thu Aug 21 10:50:08 2008

Total mass of reagents if only 95% efficient?
Q. I'm a bit stumped by these efficiency questions: Elemental phosphorus is produced by treating rock phosphate, Ca3(PO4)2, with a mixture of carbon and silicon dioxide, according to the following equation: 2Ca3(PO4)2 (l) + 6SiO2 (l) + 10C (s) ---> P4 (g) + 6CaSiO3 (l) 10CO (g) In this process, the rock phosphate is rarely pure, and various unavoidable losses occur, reducing the efficiency of the process. a) If the rock phosphate used contains 90% calcium phosphate, how much rock phosphate is needed to produce 1 tonne (1000kg) of phosphorus, P4? b) If the process is only 95% efficient, what is the total mass of reagents needed to produce 1 tonne of phosphorus?
Asked by Vineda - Mon Feb 11 05:50:22 2008 - - 1 Answers - 0 Comments

Stoichoimetry questions...?
Q. Could somebody please help with the following 2 questions.. 1)Silicon carbide is used to coat objects such as drill bits and saw blades in order to make them more wear resistant. It is produced by reacting carbon and silicon dioxide in electric furnaces, according to : 3C + SiO2 --> SiC + 2CO If 1 tonne of carbon and 1 tonne of silicon dioxide are heated, how much silicon carbide will be produced? 2) Elemental phosphorus is produced by treating rock phoshate, Ca3(PO4)2, with a mixture of carbon and silicon dioxide, according to the following equation: 2Ca3(PO4)2 + 6SiO2 + 10C --> P4 + 6CaSiO3 + 10CO In this process the rock phosphate is rarely pure and various unavoidable losses occur, reducing the efficiency of the process. a) If the… [cont.]
Asked by James E - Tue Feb 12 00:42:57 2008 - - 1 Answers - 0 Comments

Can you please help me work this out...I don't really understand Thermodynamics...Please show work...Thanks
Q. Thermodynamic Quantities @ 298.15K (25 C) Substance Hof(kJ/mol) Gof(kJ/mol) S(J/K-mol) Ca(s) 0 0 41.1 CaCl2(s) -795.8 -748.1 104.6 Ca2+(aq) 226.7 209.2 200.8 Cl2 0 0 222.96 Cl-(aq) -167.2 -131.2 56.5 O2(g) 0 0 205.0 H2O(l) -285.83 -237.13 69.91 P2(g) 144.3 103.7 218.1 PCl3(g) -288.1 -269.6 311.7 POCl3(g) -542.2 -502.5 325 S (s, rhombic) 0 0 31.88 SO2(g) -269.9 -300.4 248.5 SO3(g) -395.2 -370.4 256.2 1.)What s S for the oxidation of solid elemental sulfur to gaseous sulfur trioxide, 2S (s, rhombic) + 3O2(g) 2SO3(g), in J/K? 2.)What s S for the decomposition of phosphorous trichloride into its constituent elements, 2PCl3(g) P2(g) + 3Cl2(g) in J/K? 3.)What is H for the decomposition of gaseous sulfur trioxide to its component… [cont.]
Asked by Chemistry Help - Sat Jul 12 23:02:19 2008 - - 1 Answers - 0 Comments

A. S rxn = (sum of S of products) - (sum of S of reactants) H rxn = (sum of H of products) - (sum of H of reactants) when you need it: Grxn = (sum of G of products) - (sum of G of reactants) or G = Hrxn - T Srxn
Answered by The Old Professor - Sat Jul 12 23:12:49 2008