chemistry
I have a worksheet that has a question on it the question states: How much iron can be recovered from 25.0 g of Fe2O3 and that is all i have i have just started in the middle of this class can i have an explanation of how to get to the answer please?
math
Write a number with 8 more in the tens place (The number is 498,763.14)
Math
Ok I have it! 40 divided by 8 = 5 x 6 = 30 Roses
Math
Bunches of 6 roses were selling for $8. Anita paid $40 for roses. How many roses did she buy? PLEASE HELP!
Trig
Prove cos^2t+4cost+4/cost+2=2sect+1/sect
Trig
A ship leaves port with a bearing of S 40 W. After traveling 7 miles, the ship turns 90 degrees on a bearing of N 50 W for 11 miles. At that time, what is the bearing of the ship from port?
Trig
prove sin(α+β)sin(α-β)=cos^2β-cos^2α
chemistry
I realize this, but I don't understand how to get k1 and k2 in the first question or the second. Also it only gives one temperature in the first question so would t1 and t2 be the same?
chemistry
I realize this, but I don't understand how to get k1 and k2 in the first question or the second. Also it only gives one temperature in the first question so would t1 and t2 be the same?
chemistry
I have two questions that I really don't understand. The first one is: A reaction proceeds with delta H=-10kJ/mol. The energy of activation of the uncatalyzed reaction is 150kJ/mol, whereas it is 100kJ/mol for the uncatalyzed reaction. How many times faster is the catalyze...
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