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Chemistry help!! 10 points!! please help...

Which of the following reactions will occur at the anode in an electrochemical cell? 2Ag+ (aq) + 2e ‾→ 2Ag (s) Cu^2+ (aq) + 2e ‾→ Cu (s) Cu^2+ (aq) + Zn (s) ‾→ Zn^2+ (aq) + Cu (s) Cd (s) ‾→ Cd^2+

What's the difference between a Tetrahedral and a Trigonal Pyramid? *Molecular Geometry*

They look the same to me? :\ Answers appreciated.-Tetrahedral is 5 atoms bonded together, trigonal pyramidal is 4 - with a lone pair replacing the fifth.

Can someone please help me with this first year chemistry question? (Enthalpy)? Please :)

A reaction raises the temperature of 40.0g of water by 5.00°C. What is the enthalpy change for the reaction? The specific heat density of water are 4.18 J K-1 g-1 and 0.997g mL-1 respectively. I kno

How is burning Mg a synthesis chemical reaction

In Chem class we lit Mg on fire and let it burn. It says on the lab paper that its a synthesis reaction but how would you balanced that?-2 Mg + O2 → 2 MgO Magnesium oxide is being synthesized.

If you are given a 2M NaOH solution having density 1gm/ml,then find the molality of solution????[M=molarity]

Chemistry problem????-Take 1 litre of the solution This has mass = 1000g ( from the density given) This contains 2 mol NaOH = 40*2g = 80g Mass of water = 920gMol NaOH = 2.0mol You have 2.0mol in 920g

Which of these are Organic Compounds

1. Na2CO3 2. CH3CH2CH3 3. CH3OH-2 and 3, but not 1.

Empirical formula of CxHyXz

how would you find the empirical formula of a compound with %C=66.41, %H=5.58, %X=28.01 (where X is a halide)?-1] Choose, arbitrarily, a basis for calculation. I choose 100g 2] THat means there are 66

What is the molarity of a solution contain 5.50gNaSO4 in 2.50 mL solution

(Na=22.99. S=32.07, O=16.00)-get moles of NaSO4 = 5.50g / 119.06 = .0462 molarity = moles / total volume in L = .0462/.0025L = 18.5M

Joules Heat chem. equation

what is the final temperature of 75 grams of water initially at 25 degrees Celcius. upon the absorption of 2800 Joules of heat? work shown or exaplained would be greatly appreciated!!!!-so this isnt a

A sample of neon occupies 4.50 liters at 30 degrees C and 2.50 atm. What volume does it occupy at STP

Someone please help me! My final is on friday and I dont know how to do this! a.) 4.19 L b.) 23.6 L c.) 10.1 L d.) 73.2 L e.) 8.45 L Thanks!-Use the combined gas law ---- P1V1/T1 = P2V2/T2 Change d

What is the volume of gas if 3.50 liters of the gas is heated from 273K to 373K at constant pressure

use charles law v/t = v/t 3.50L/273K = v/373 v = 4.78L

Finding normality, chemistry question, need help please!

Ive been stuck on this problem for 4 hours and i dont know what to do. H3PO4+3NaOH----> Na3PO4+3H2O if 30.00ml of 0.1000N NaOH was required to neutralize 15.00ml of an H3PO4 solution, what is the no

How much heat is liberated

How much heat (in joules) is liberated when 1.170Lof ozone at 18 degrees celsius and 62.8 mm Hgdecomposes to ordinary oxygen, O2?-wow thats quite a question they gave you there but is here how to solv

Help! Molarity of H+ from pH

What is the molarity of H+ in the following solution?pH= 7.30-Work out 10 to the power of -7.30 for your answer.

Calculating the total internal energy of a system (thermochemistry)

system is changed in a two step process: Step 1: The system absorbs 70 J of heat while 30 J of work is done on it. Step 2: The system releases 30 J of heat to the surroundings while performing 70 J o
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