Chemistry

Final temperature after ice and water

6.05 g of ice at -5 C is added to a 7-mL glass of water at 10 C. What is the final temperature? (assume density of water = 1.00 g/mL)-Tried it and the answer doesnt come out right. Are you sure you wr

How many milliliters of 6.20 M HCl are needed to obtain 0.140 mol of HCl

just a simple conversion, and im confused apon the process of completing it-find volume, by dividing by Molarity: (0.140 moles of HCl) / (6.20 moles HCl / Litre) = 0.02258Litres aka 22.58 ml your an

Please help me... Please. Oxidation state in redox reaction.

balancing acidic redox reaction, the oxidation of ethanol by dichromate ion in acidic solution, producing chromium (III) ion, and acetaldehyde (CH3CHO) as products: The breathalyzer test!) C2H5OH + C

Adding half cell potentials or reactions

You need to add it so it cancels out the electrons, right? So take the following example... Cu+ + e- = Cu E = 0.522V Cu++ + 2e- = Cu E = 0.340V So I would need to double the first reaction 2Cu+ + 2e-

Really hard balancing question: please explain

my tutor gave me this queston to practice with, but ive been working on it for over an hour and cant do it, could someone please guide me in the right direction? its so confusing. Im supposed to balan

How do I find the net ionic equations for these

I would appreciate a painstaking explanation as well as step-guidance. Thank you all. What are the net ionic equations for the following reactions: AgNO_3 (aq) with Ba(OH)_2 (aq). HCN (aq) with CO

Ephedrine, which is used as a bronchodilator, has the chemical formula C10H15NO.

What mass of CO2 would be produced during a combustion analysis of 0.40267g of ephedrine? Answer in units of g. I dont know the balanced equation D:-here is your equation: 4 C10H15NO + 57 O2 = 40 CO

Chemistry 101 question

If water was to be used instead of Hg in a barometer how high would that column be at 1 atm? d Hg = 13.6 g/mL d H2O = 1.00 g/mL d H2O = 10.3 m h = 760 mm-The density of Hgis 13.6 times the density of

Chemical and physical reactions

I needexamples (not too complicated) of 3 chemical and 3 physical reactions that happen in your kitchen thanks.-Physical. Water boiling, blender blending something, cutting something up. Chemical: gas

Please help: What is white gold

Is it an element, compound, homogeneous mixture or heterogeneous mixture?-Alloy.-Platinum(Pt) Its an element-It is Cocaine (Or if youre 10 its Snow). Its a compound.

How to make limestone react faster in hydrochloric acid.

so here is the questionL: We have a piece of limestone in hydrochloric acid. It is not reacting very fast. Explain 3 ways in which we could make it react faster: please give some information on what

Need help with a dimensional analysis problem for Chemistry

If your teacher has 4 classes of chemistry, with 30 kids per class, how many tests does he have to grade?i did class-->students--->tests did a T chart and came up with 120 tests.now second part says,

An aqueous solution 4.68% NaOCl by mass. Assume a density of 1.02 g/mL. What's the molarity

Molarity = moles solute / volume solution lets assume you have 1 Liter of solution, to make things easier. 1L = 1000 mL 1000mL x (1.02g/1mL) = Total grams of soluute. = 1020g solute but since only

What does oxygen look like at room temperature

its invisble/seethrough. In liquid form its seethrough too but still visible. EXACTLY like water. How does dispersed water vapor look? It doesnt. You cant see it in the air.-You cant see it at room te

In the presence of H2 and Pt, propene is reduced to propane. CH3CH=CH2 (propene) + H2 >> CH3CH2CH3 (propane)

a. How many moles of H2 are required to completely react with 6.23 mol of propene? b. How many moles of H2 are required to completely react with 2.79 mol of propene? c. How many moles of propane are e