How do you do these chem questions?

Question

1. A 2.500-g sample of uranium was heated in air. The resulting oxide weighed 2.949 g. Determine the empirical formula of the oxide.

2. A strip of copper weighing 3.178 g is strongly heated in a stream of oxygen until it is all converted to 3.978 g of the black copper-oxygen compound. What is the percentage composition of of copper and oxygen in this compound?

3. Identify the type of reaction, write the products, and balance the equation.

CH3CH2OH O2 ---->

4. Nonane, a component in gasoline, was found to be present at a fire that was suspected to be arson. (a)Write the balanced equation for the burning of nonane, C9H20, in air. (b) How many grams of oxygen, O2, are required to burn 500. g nonane?

5. 4NaOH 2Xe F2 ---> 2Xe O2 4NaF 2H2O

Calculate the mass of oxygen resulting from the reaction of 85.0g XeO2 with excess NaOH solution.

Answer 1

How do you do these chem questions

Answer 2

haha you have mrs. gewecke.

do your own homework noob.

Answer 3

Lol. A.P. Chemistry?