Chemistry Problems. Please Help!!?

Posted on 2014-12-08 07:18:00 in Chemistry by MOLLI

Classify the 4 following reaction as either a decomposition, formation, combustion, or none of these.

1. CH4 + 2O2 ? CO2 + 2 H2O

2. 2 Sb + 3 I2 ? 2 SbI3

3. 2 N2H8Cr2O7 ? 4 Cr + 2 N2 + 8 H2 + 7 O2

4. Fe2O3 + 3 Mg ? 3 MgO + 2Fe

5. What is the mass of a Cs atom in kg? (1.00 amu = 1.66x10-24 g)

6. What is the mass of the N2H8SO4 molecule in amu?

7. How many moles of MgBr2 are there in 118.0 g of that compound?

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