yuuki

I have a lesson once a week and text book. i am in the university without Academic experience because this is not reguler university. They recived me without matriculation exams. This is the reson that i must to study very much by my self. I appreciate your help,but i see that i'll be needed to make alone.

i don't have any Academic experience. i started to study for BA in the university in august. if you guys don't have way to explain me this you can lock this topic or even delete if you hve this option. thank you guys for trying to help me.

i will try to Rephrase the first question: i have 3 Materials: Potassium bromide,carbon tetrabromide and Acetone. where can i get more information about the Characteristics of this materials?

i doesn't see how to edit/delete this topic. it is ok to open 4 new topic with clarity Formulation?

i tried to ask the moderator for explaning, but i didn't understood his explain. what should i do? ask for more explaning? open different topic for every question?

i want to Clarify my intention, i want only some explaning about this questions,i started B.A and i don't get much help from the university. i really didn't had Intent for someone do this work for me. i'm sorry about the confusing Formulation.

i don't know much about this chemicals so i don't know how to match them to the Sentences and explain why do they match. if can you explain me how can i know if material is soluble it will be helpfull.

I Didn't asked for the answers. i asked someone to explain me this Questions. i don't get much lessons and i have to study all by my self,so i asked for some help to understood this. as i wrote "solve them and explain it to me".

i have this 4 Questions that i'll be happy for someone to help me solve them and explain it to me. 1) i got list of this Materials: ,C2H5OH , CBr4 , KBr. and this list of Sentences: -Fluid conductive -Water soluble liquid -solid soluble in cs2 i need to Match sentence to material and to explain this: why does the material soluble in sc2? Write the material reaction in cs2. does the Solution is Leads electricity? does the material at the first Sentences is Water soluble? 2) -i need to explain the Temperature difference between this material: CH3COOH, CH3COCH3, CF4, CH4. -what is the Isomer of CH3COCH3? 3)A student burned a mixture of 4.40 g propane gas, C3H8, and 16 g of oxygen gas, O2. The following response occurred: C3H8(g) + O2(g)  CO2(g) + H2O (l) this is the Equivalent equation: c3h8(g)+5o2(g)→3co2(g)+4h2o(g) -The resulting gases are transferred to a tank at a temperature of 20 ° C C and a pressure of 2.00 cm. What is the volume of the tank? Show your calculations. -Why water is in a liquid state at room temperature while carbon dioxide is Gas under these conditions? -explain why Propane gas Not dissolving in water but dissolving Cyclohexane(C6H12{1}) 4) To determine the concentration of calcium ions in tap water, prepare a sodium carbonate solution (aq) Na2CO3, by Dissolving 0.265 g of Na2CO3 (s) in 500 ml of water. -i Write a formulation for the melting process of sodium carbonate in water. ii Consider the concentration of the solution prepared. specify your calculations. -A sample of 100 milliliters of tap water was taken into which sufficient solution was added The sodium carbonized. The following response occurred: Ca2+ (aq) + CO3 2- (aq) = CaCO3(s) i Calculate the concentration of calcium ions in water. ii Calculate the mass of calcium ions in one liter of water. -In another experiment they took a certain amount of calcium carbonate and reacted with 5 milliliters of HCl (aq) solution at 0.2 M concentration CaCO3 (s) + 2HCl (aq)  CaCl2 (aq) + CO2 (g) + H2O (l) -What is the amount of calcium carbonate that reacted? ii) How many carbon dioxide molecules have been created?