Chemistry

How would I answer this question on a chemistry test

Arrange the following compounds in order of increasing solubility in water: O2, LiCl, Ca(OH)2, methanol (CH3OH) an benzene (C6H6). Explain your answer. Thank you so much it is ten percent of my final

Question about energy transformations

Okay, so when you light a match ,the energy transformation that takes place is: CHEMICAL POTENTIAL ENERGY>>HEAT AND LIGHT ENERGY My question is, could you count that as two energy transformations? I

Please help me with this chemistry problem!!!! exam tomorrow :(

i dont know how to do this question off my practice exam:What is the molality of an aqueous solution of urea, CO(NH2)2, if the vapor pressure above the solution is 22.83 mmHg at 25°C?Assume that urea

Does CoCl2 react with Pb(NO3)2

In my lab class we did several reactions and when i mixed the aqueous cobalt chloride and lead nitrate, i didnt see anything happening. are they supposed to react...? if so, what is the equation?-When

What happens if you heat an empty test tube over a Bunsen burner

What happens to the bottom of the test tube if you heat it on the yellow flame for 10 seconds? If you then heat it on the blue flame, what happens to the bottom of the test tube now?-I think when heat

Periodic table question

is it possible to memorize the periodic table after watching it ONLY 2x on youtube?-No, you cant do that by looking at it only twice.But studying chem for a little while will make you remember all the

Empirical formula n percent

In a experiment I got, 2Mg + O2 --> 2MgO Mg = 0.049gO = 0.029g2MgO = 0.078g how would i find the empirical formula and percent by mass of this?-(0.049 g Mg) / (24.3051 g/mol) = 0.00201603779 moles

Which process can be explained by the kinetic-molecular theory

Which process can be explained by the kinetic-molecular theory? a. combustion c. condensation b. oxidation d. replacement reactions-Condensation. By lowering the temperature you are actually slo

Chemistry help, determining the states of matter (solid, liquid, Gas, Aqueous solution)

ok so weve done three chemical reactions coming up i.e Mg(SO4)(aq) + NaOH(aq) YIELD MgOH(?) + Na2So4(?) and it produced a substance with a jelly like characteristics with liquid on the top. My quest

Organic Chemistry Questions

I was wondering about drawing amines. So could an amine have an ethyl group attached to it, but then have a methyl attched to the ethyl? Like this: ........CH3 H3C-CH-NH-CH3 (sorry about the dots, it

How many GRAMS of potassium are present in 1.84 grams of potassium chloride

1.How many GRAMS of potassium are present in 1.84 grams of potassium chloride ? 2.How many GRAMS of potassium chloride can be made from 4.81 grams of potassium ? 3.How many GRAMS of boron are prese

How do you find the molecular formula after you find the empirical formula in chemistry

A compound is found to contain 46.68 % nitrogen and 53.32 % oxygen by weight. The empirical formula for this compound is? NO The molecular weight for this compound is 30.01 g/mol. The molecular form

How do I calculate the hydrogen ion concentration in an aqueous solution of HCl with pH 3

Hi! Thank you so much for looking :).-[H+] = 10^(-pH) = 10^(-3) ----- your log10 is used to go the other way pH = -log10([H+]) to confirm in case in point pH = -log10(10^-3) = - - 3 = 3 check

Hydrocarbons; Please help fast!!!!!!!!

Hi, I need help with Hydrocarbons. I can name them however, I dont understand how you write the number of hydrogens in a structure: a) CH3-CH2-CH3 (How come theres 3 hydrogens in the beginning and 3

How do I know what number to put at the end of an element in a chemical equation

Eg. Ca(s) + O2 (g) -> 2CaO Why did the O on the left have a 2 beside it and it lost the 2 when it reacted and formed what is on the right?-Like in H2OThe 2 means 2 atoms of hydrogen in the formula So