Chemistry

Why is there change in the mass of the match stick after being burned

i am doing an experiment in chemistry. I know WHY it loses mass. i just need help putting it in words. the match, before burned, was .2 grams. it lost half its mass. now its .1 grams. its black and t

Compare miscible and immiscible

miscible= mix together without separatingas water and alcohol immiscible will separate if mixed together as in oil and water-miscibility is basically the ability of a liquid to mix in a solution to fo

Can you answer these

Is is safe to: Do business? Get married? Move a house? To travel? Make renovations?-My answers: 1. business-no 2. marriage-no 3. move house-no 4. travel-no 5. renovate-no-Do business? Lay off the drug

What volume of a 0.243 M solution of HBr isneeded for a reaction that requires 40.7 g of HBr? Answer in L.

Chemistry Problem...-detremine moles HBr: 40.7 g/80.92 g/mole HBr= 0.503 moles HBr 0.243 M x L=0.503 moles L=2.07

What is ph value ? what is the ph value of water

It measures the concentration of H+ ions OH- ions. ph value of water is 7.-pH is essentially a measure of the concentration of Hydrogen (H) ions in a solution. This is where the confusing part comes i

Question about Cis/Trans Isomers

CH3CH2CH2CH3 CH2=CH2CH2CH2CH3 CH(triple bond)CH2CH2CH3 Do any of the about have geometric isomers and why?-No. 1. Single bonds - free rotation. 2. Two atoms the same on the left-hand carbon.(The molec

Why isn't soap as effective at a lower pH

Looking at the simplified equilibrium shown here, describe why soap might not be as effective at a lower pH. Uncharged Micelle Negative Micelle+H+ Thanks for any help!-soap is a basic product. a lo

Balance the equation below using the smallest whole-number coefficients.

Balance the equation below using the smallest whole-number coefficients. __Zn+__Cr3 ----> __Zn2+__Cr-3 Zn + 2 Cr{3+} = 3 Zn{2+} + 2 Cr

Question about vapor pressure

A solution of propanol is placed in a capped flask. Which of the following would increase the vapor pressure of propanol? I. Add more propanol to the flask. II. Increase the surface area of the liquid

What's the best metal to attract electricity

What metal can be used to attract electricity the best? Ive heard nickel, copper, & cobalt. But I have no idea which would work better.-Metals dont attract electricity.Electricity flows through metals

How is a halogenation reaction similar to a hydrogenation reaction

Thank you-Both are typically SN2, and both typically result in the addition of a nucleophile and a proton. edit:yeah.Markovnikov addition has nothing to do with HX and the nucleophilic addition of a

Does molecule size affect its polarity

such as C6H14 and C6H6 -- which 1 is more polar?-Its not so much a molecules size that affects its polarity. C6H14, or one of the hexanes, is very non-polar because all the carbon atoms are sp3/tetra

PH of a strong acid. Tricky

What is the pH of a solution containing 10^-9 M HClO4? I know HClO4 is a strong acid so the answer should be -log(10^-9) = 9 But the answer says its 6.996. What am I missing?-Remember that pure wate

A brief history of iodine

Key word BRIEF please!!-Iodine was discovered by Bernard Courtois in 1811. He was born to a manufacturer of saltpeter (a vital part of gunpowder). At the time of the Napoleonic Wars, France was at war

How do I calculate the pH of a 2 molar solution of potasium hydroxide and water

I always wanted to mee you banana. KOH ---> OH- + K+ KOH IS A VERY STRONG ACID THAT MEANS THAT THE CONCENTRATION OF [OH-]=[KOH]=2M POH=-LOG[OH-]=-LOG[2]=-0.301 PH=14-POH=14-(-0.301=14.301-Just one mis