chemistry
An ore contains Fe3O4 and no other iron. The iron in a 27.07 gram sample of the ore is all converted by a series of chemical reactions to Fe2O3. The mass of Fe2O3 is measured to be 21.9 grams. What was the percent Fe3O4 in the sample of ore?
chemistry
The reaction of 9.3 grams of fluorine with excess chlorine produced 4.1 grams of ClF3. What percent yield of ClF3 was obtained?
chemistry
Two liquids of different densities (ρ1 = 1500 kg/m3, ρ2 = 500 kg/m3) are poured together into a 100 L tank, filling it. If the resulting density of the mixture is 800 kg/m3, find the respective masses of the liquids used.
engineering
A steel cylinder has a volume of 0.26 L and holds 4 kg of water at 25˚C and 200 kPa. (a) Find the total mass and total volume of the system (cylinder + water). (b) Give the values for two EXTENSIVE properties and two INTENSIVE properties of the water.
biology
She is none of those names she i saying the truth it is cheating im only on here to check my answers so she dont deserve to be called that so you should back off bob
physics
A baseball is thrown horizontally off a cliff with a speed of 11 ms^-1. What is the vertical distance, to the nearest tenth of a meter, that the ball has fallen after 4.8 seconds?
english
which of the following contributes most to the mystery of "An occurrence at owl creek bridge? A) the breaking from the confeeracy B) for spying on Union activities C) for planning against the enemy D) for refusing to fee union soldiers I think the answer is c but not sure
English 11
I agree with jenne it is c
statistics
oh nevermind, i get what you are saying :) would you recommend that i do two different groups of mean and variance, one group is for having malaria, the other for not?
statistics
would i therefore need to be doing sigma = square root of [np (1-p)]?
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