Chemistry
Heating an ore of antimony (Sb2S3) in the presence of iron yields antimony and iron (II) sulfide. Sb2S3 + 3 Fe = 2Sb + 3 FeS When 15g of Sb2S3 reacts with 10g of Fe in the lab 9.84g of Sb is produced. What is the limiting reactant in this reaction? What is the theorectical yie...
stat
A set of n = 5 pairs of X and Y values has SX = 10, SY = 20, and SXY = 10. For this set of scores, what is the value of SP?
science
How long does it take to prepare 4.00 g of Al by electrolysis of Al2O3 using a current of 2.50 ampere?
science
If 2.7 moles of copper metal was deposited from a solution of Cu(NO3)2, how many electrons were involved?
Physics
An electric force of 3x10^-8N is produced from an electrostatic point charge of 4x10^-10. It is 40cm from another electrostatic point charge. What is the charge of the second point?
Physics
If an electric force of 550N is produced from two charges, one is 345C, the other is 125C. How far apart are the charges?
math
A jara has 25 green grapes and 75 purple grapes. what is the probability that a purle grape will be chosen at random?
Physics
You are standing on a beach and 5 wave crests land on shore in 50 seconds. Each wave is 32m apart. Find Frequency, period, wavelength and speed.
math
Between which two consecutive integers is the value of this irrational number? square root of 117? A. 8 and 9 B. 10 and 11 C. 14 and 15 D. 20 and 21
math
Max,Owen,Elise, and Cara went to a school carnival. They each played the dart throw,ring toss,water shoot,and basketball throw. Each student won a different game. CLUES:*Max didn't score any points at the dart throw. * Elise correctly tossed 2 rings, but did not win the ri...
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