Chemistry

How much will a 15 cm x 5 cm x 7 cm bar of gold weigh in kilograms? The density of the metal is 19.36cm3/mL

Also this one, Calculate the total amount of heat energy necessary to reduce the temperature of 250 grams of steam from 110oC to -5oC. i have this Very very Long assignment ... But i cant seem to ge

Is formic acid and methonic acid the same

what is the acid in ant sting and bee sting?-Yes they are same with a formula of HCOOH-They are the same but the systematic name is methanoic acid not methonic.

What happen when sulpherdioxid disolved in water

please explain with more words if you are possible-You get a solution of sulphur dioxide dissolved in water.A very small amount will combine with the water to give sulphurous acid:SO2(g) + H2O(l) → H2

Help with balancing 2 chemistry redox reaction

I generally know how to do these problems, but these two equations seem to be special cases. I just need help writing down the half equations (for the oxidation and reduction). Br2 ---> BrO3(-) + Br(

What is this peptide bond related question asking

I got a homework question that asks the following. How many different tripeptides can be formed from one molecule each of the amino acids tyrosine, valine, and alanine? However, Im not quite sure I u

How to write complete reaction

How would i write the complete reaction for the chain initiation step for polymerization of Methyl Methacrylate (Plexiglas) using Benzoyl Peroxide as an initiator? I got some progress but i dont even

Help me name this alkene

The alkene is: ...............CH3 ................| CH3 - C = C - CH3 ..........| .........CH2 ..........| .........CH3 With all numbers in subscript. (Ignore the dots, it doesnt give the proper str

Problem solving, either i am retarded or this problem is really hard, Help me please

A patient is given a nasogastric solution containing 40 grams per liter each of fat, carbohydrateand protein. Calculate the total number of calories is receiving if he is fed 2.5 liters of the solutio

Electrons crazy behaviour

Okay... Im no established scientist and I dont get some big words but in as simple terms as you can manage in a full explanation could somebody please resolve this confusing problem: My physics teach

Balance the following electrochemical equation in basic media OCN- + OCl- ==> CO32- + N2 + Cl-

Balance the following electrochemical equation in basic media OCN- + OCl- ==> CO32- + N2 + Cl- what is the # of moles of H20 in the final balanced equation?-Heres my update: This problem only needs t

I have a chemistry convertion problem that I can't figure out.There it goes.

Vanillin(used to flavor foods) can be detected at 2.0 x 10-11 g/L of air. If the current price of 50 gr of vanillin is $112, determine the cost to supply enough vanillin so that you would be able to d

If you are a Chemist, how much traveling and driving do you have to do

Id like to get married one day and have children. Im interested in nanotechnology, chemical engineering, physics, technical writing, public health and medical engineering. I live in Florida and Id lik

Chemistry ideal gas law question..

A mixture of gases collected over water at 14°C has a total pressure of 1.198 atm and occupies 72 mL. How many grams of water escaped into the vapor phase? I used the ideal gas equation and got 6.45

Is this really bad for you

i got a free sample of thermal spring water that apparently has lots of minerals and anti-oxidants, its a spray can for the face. but it says at the back that it contains pressurized nitrogen. is this

A tank contains 500 ml of helium

A tank contains 500 ml of helium at 1500 torr.What volume will the helium occupy at 750 torr, assuming no temperature change.I dont even know what a torr is? Help please, thanks.-torr is a measurement