Chemistry

Chemistry Lab help needed!!?!

Im doing an unknown lab in chem. and we have done lots of tests and we are pretty sure we have calcium chloride(CaCl2). Our teacher makes us prove our unknown with different tests.. We have already p

The replacement of bromine by chlorine in a salt is an example of a single-displacement reaction by

a. sodium. b. water. c. halogens.-c. halogens both Br and Cl are in the same group as F, they all have 1- charge and are called the halogen group-c. halogens

PLEASE HELP ME!! What is the written and balanced reaction for the complete combustion of propane (C3H8)

Needed for chemistry homework! :D THANK YOU SO MUCH!! LOVE YOU TO PLUTO AND BACK :D -Propane reacts with oxygen in the air to yield carbon dioxide and water. C3H8 + 5 O2 → 3 CO2 + 4 H2O

HOW TO BALANCE? KHF2 --> KF+ H2+ F2

N2H4 --> NH3N2 THIS ONE TOO PLEASE I HAVE BEEN DOING CHEM FOR OVER 5 HOURSUGHHHHH-There are chemical equation balancers all over the internet. Try using those.-2 KHF2 → 2 KF + H2 + F2-2KHF2-->2KF+H2

Calculating specific heat of a metal

Mass of metal = 25.605g Distilled Water Volume = 25mL Distilled Water Temp = 25.3C Temp of Metal = 100.5C Temp of Mixture = 29.1C (Specific Heat of water = 4.18J, in this given lab) How do I figure o

What is the physical state of propane at its melting and boiling point? Solid, liquid, or gas

I know that propane is a gas at room temperature. I also know that the melting point of propane is -190 degrees C and the boiling point is -42 degrees C. Can someone please help me by telling me what

Calculate the mass in grams of 10 atoms of the K.

Calculate the mass in grams of 10 atoms of the K. This thing says the answer is 6.5E-22 But here is what I do: (10*(1/39.09))/6.022*10^23 This gives 4.3E-25 Amidoinitwrong?-K = 39.09 grams per mo

How do you find the products

i am doing my chemistry homework, and we are balancing equations. how do i find what the product will be based on the reactants?-It takes a lot of practice. As you see more and more equations youll ge

Analyse the reaction mechanisms of bromine water with cyclohexene

i need some help please-Equation: C6H10 + Br2 → C6H10Br2 Mechanism of reaction → Electrophilic addition.

Chemistry lab question on dilutions in titration

Hi everyone, We had a lab this week where we learned how to identify an acid by titration. However, Im having a little trouble with some calculations. So basically we had 0.1g of an unknown solid th

Tin foil hat is not blocking those evil ALIEN brainwaves like it should

Now what do I do?-Resistance is futile! Relax and enjoy them probes!

Balancing Equations just one question (easy 10 points)

Ive solved 30 of balancing equation , but theres one of them that are getting on my nerve -.- 1) NH4OH+ H2SO4 = (NH4)2SO4+ H2O-Balanced equation: 2NH4OH + H2SO4 ---> (NH4)2SO4 + 2H2O Have a good day

Essential amino acids

essential for all humansessential for infants and growing children 1.phenylalanine1. cysteine 2.valine2. tyrosine 3.threonine3. histine 4.trytophan4.arginine 5.isoleucine5.? 6.methionine6. ? 7.leuci

Stoichiometry question

Consider the reaction: HBrO3(aq) + 5HBr(aq) -> 3H2O(l) + 3Br2(l) What mass of H2O is produced when 1.25 dm3 of 0.45 mol dm-3 HBr(aq) are reacted?-well lets approach this problem logically for a seco

8 chemistry questions help

can u please explain these STEP BY STEP thanks:) 1) what is the mass in grams of 1 mole of P2O5 ? a. 293.03 gb. 61.96 gc. 46.98 gd. 141.96 g 2) what is the percentage by mass of hydrogen in ordinary