1. Exactly 4.32g of oxygen gas was rquired to completely burn a 2.16g sample of a mixture of methanol and ethanol . Answer the following question (1) and (2) atomic weights : H=1, C=12, and O=16)
(1) How many mole of ethanol are contained in the sample?
(2) what is th percentage by weight of methanol in the sample? write the percentage centage to two significant figures.
2.)In the electrolysis of 200ml of 0.5mol/L CuSo4 solution using platinum electrodes 0.16g of oxygen gas evolved at the anode. Answer the following question (1) and (2) ( Atomic weight : H=1, O=16 .S= 32 and Cu=63.5)
(1) How many faradays of charge was passed through the solution?
(2) what should be the molarity of the CuSo4 solution after the electrolysis?
ช่วยทำโจทย์เคมีหน่อยค่ะ (เป็นภาษาอังกฤษ)
(1) How many mole of ethanol are contained in the sample?
(2) what is th percentage by weight of methanol in the sample? write the percentage centage to two significant figures.
2.)In the electrolysis of 200ml of 0.5mol/L CuSo4 solution using platinum electrodes 0.16g of oxygen gas evolved at the anode. Answer the following question (1) and (2) ( Atomic weight : H=1, O=16 .S= 32 and Cu=63.5)
(1) How many faradays of charge was passed through the solution?
(2) what should be the molarity of the CuSo4 solution after the electrolysis?