Chemistry

Kw of water is 4x10(raisedtothepower-14) and pH is 6.7at318 K but H2O is not acidic.Why

value of ioniztion constant Kw of water is 4x10(raisedtothepower-14) and pH is 6.7at 318 K but H2O is not acidic at 318.Why??? plz help!-Water molecules can function as both acids and bases. One water

Chemistry 11 - Percent Yield Question

If the conversion of Iron ore to iron is represented by Fe2O3(s) + 3CO(g)-->2Fe(s)+3CO2(g) produces 147 g of iron from 500 gof iron ore, what is the percent yield? Is the answer 29.4% iron ore? Tha

How can a fluorine atom change into a fluoride ion, F-

its atomic no. is 9 and it gains 1 electron to become stable.-To create a ion you have to add or take away electrons. These electrons must be taken from or added to an other atom. Look at El Phabas a

What is the final temperature of water and aluminium

A 23.35 g aluminum block is warmed to 60.35 °C and plugged into an insulated beaker containing 90.93 g water initially at 19.81 °C. The aluminum and the water are allowed to come to thermal equilibriu

Write out the structural formula for octanoic acid. Identify the alpha carbon.

My homework made sense up until this page. Please help, much appreciated.-The structure would be an 8 carbon chain with a double bond to O and an OH on the 8th carbon. You can see the structure here:

From which atomic no. does radioactive elements start

from 84(polonium) it begins, but no.64(gadolinium) in the lanthanide series is also radioactive.-1.Tritium, an isotope of hydrogen with atomic number 1, is radioactive.-Most atoms have a stable form.M

What is i^65 + i^54?

i - 1-Im comfortable with up to i^4, so: = i^65 + i^54 = ((i)^5)^13 + ((i)^2)^(27) = ((i)^4 * i)^13 + (-1)^27 = (i)^13 - 1 = (((i)^4)^3 * i) - 1 = ((1)^3 * i) - 1 = i - 1 (Answer) Have a good day.-I

Heat Exchange Problem! Please help me!

A 300g metal bar at 23 degrees C is placed in a oven. 23,000 J of the heat added to the bar causes the temperature of the bar to increase up to 193.37 degrees C. What is the specific heat(c) of the ba

Examine the imporance of optical isomers in the biologyical system

All the amino acids are laevorotatory.-Oh go and do your own homework.

Calculate the [H30+] and OH- of the following substances from its PH 10 points!

tilex ph 9 rasberry ph 2 apple juice ph 4 woolite ph 7 nouth rinse ph 6 lysol ph 5 dish soap ph 8 powerade ph 9-ph= -log [H] take antilog of ph and you will get conc of H+ While conc of OH- is pOH= 1

Chem problem - liters of gas formed from this reaction

Please help me with the following chem. Problem.It is driving me nuts because I don’t think it applies to any of the gas laws and I know it can be solved with some sort of molar conversion but I don’t

Why cant sodium borohydride (NaBH4) reduce carboxylic acids or esters

NaBH4 cannot reduce these compounds into alcohols but LiAlH4 can. Sources I have read say that this is because NaBH4 is less reactive than LiAlH4 and that is fine, only my intuition tells me that a ca

Help me with Half-life

I am doing practice problems right now and I need someone to determine in my answer are wrong or not. Half-lives are very confusing. A patient is injected with 15 mCi of technetium-99 (t1/2 = 6.02 ho

Calculate the H30, pOH and OH of the following substances 10 points!

tilex ph 9 rasberry ph 2 apple juice ph 4 woolite ph 7 nouth rinse ph 6 lysol ph 5 dish soap ph 8 powerade ph 9-[H3O+] = 10^-pH [OH-] = 1x10^-14 / [H3O+] pOH = -log[OH-] tilex, pH 9 [H3O+] = 1x10^-9M

The reaction represented by the equation Mg(s) + 2HCl(aq)  H2(g) + MgCl2(aq) is a

a. decomposition reaction. b. single-displacement reaction. c. double-displacement reaction.-b. single-displacement reaction because the Mg replaced the H in the 2HCl.-b-b