Danya

A modern penny weighs 2.5 g but contains only .063 g of copper. How many copper atoms are present in a modern penny? Thanks in advance for any help you can give!

Calculate the amount of grams of carbon dioxide formed from 100 g of octane. The molar mass of octane is 114.33 g/mole. The molar mass of carbon dioxide is 44.0095 g/mole/ 2 C8H18 + 25 O2 ---> 16 CO2 + 18 H20 How do I go about doing this problem? How much...

How do you calculate lattice energy? I have to place the following in order of decreasing magnitude of lattice energy, but I don't know how to do it. KF MgS RbI Is there a formula or some simple way of knowing which has the greatest energy? 2. I also have...

I'm reviewing for a test tomorrow and two of the questions on the review had me a little stumped. Lim Sq. Rt.(x+5) - Sq. Rt (5) all divided by X-->0 X I was able to rationalize and ended up with (X)/ x ((sq. rt.(x+5))+ sq. rt.(5)) which gives me 1/ sq. rt...

Consider the elementary reactions and their rate constants. A(g)+B(g)⟶C(g)+D(g) 𝑘𝑓=5.72×10−^2 s^−1 C(g)+D(g)⟶A(g)+B(g) 𝑘𝑟=2.60×10−^1 s^−1 What is the equilibrium constant ( 𝐾c ) of the following generic reaction? A(g)+B(g)↽−−⇀C(g)+D(g) I'm not really sure...

3/4(12u-8) in distributive property

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