Classify each of the following reactions as a synthesis, decomposition, single-displacement, double-displacement, or combustion reaction.
1. N2(g) + 3H2(8)
2NH (8)---synthesis
2. 2K(s) + 2H, O(1)
2KOH(aq) + H29)
3. 2NaNO (5) - 2NaNO,(s) + O2(g)
4. C, H,O,(s) + 120(8) - 12C02(g) + 11H2O(g)
5. 2Zn(s)
0,(g) + heat - 2ZnO(s)
6. 2Fe(s) + 6HCl(aq) - 2FeCl3(aq) + 3H2(8)
7. 2NaHCO,(s) + heat - Na2CO3(s) + CO2(g) + H, O(g)
8. NaHCO (s) + CH, COOH - Na(CH, COO) + CO2(g) + H, O(1)
9. CH2(g) + 80,(g) + heat - 5CO2(g) + 6H, O(g)
10. 2AgNO3(aq) + CaCl(aq) + 2AgCl(s) + Ca(NO3)2(aq)
Extra Credit (Maximum of 3 Points, 1 point each

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.

Avariable that is not being directly tested during an experiment should be

Plz me ! 1 which of earths spheres contains most of its mass? a atmosphere b hydrosphere c geosphere* d biosphere 2 erosion and weathering are examples of which types of forces? a constructive forces b destructive forces* c gravitational forces d inertia-related forces 3 which of the following statements about earths atmosphere is true? a earths atmosphere contains 78% water vapor which is essentail to life b earths atmosphere contains 21% oxygen c earths atmosphere contains carbon dioxide which all life forms require d earths atmosphere allows radiation from the sun to pass through it and warm earths surface* 4 the strenght of the force of gravity between two objects is determined by which of the following factors? select all that apply a the messes of the objects* b the distance between the objects* c the volumes of the objects d the surface area of the objects 5 earth and moon are kept in there respective orbits due to the influence of a inertia b gravity c gravity and inertia* d neither gravity or inertia if you answer all questions right i will give