Chemist: date: learning objective: the student is able to express the law of conservation of mass quantitatively and qualitatively using symbolic representations and particulate drawings. refer to the synthesis of nitrogen dioxide and the element symbol key: 2no (g) + 1o2 (g) → 2no2 (g) (nitrogen = square, oxygen = circle) given the reactants, use the law of conservation of matter to draw the products: reactants: products: limiting reactant: excess reactant: limiting reactant: excess reactant: draw out the molecular pictures for reactants and products for the reaction of 120 grams of nitrogen monoxide and 96 grams of oxygen. (assume that each molecule drawn represents one mole of the substance.) also, note limiting and excess reactants. refer to the combustion of hydrogen sulfide and the element symbol key:

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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

At 20°c, a sample of h2o liquid and a sample of co2 gas each have the same average kinetic energy. why is one a liquid and the other a gas at this temperature?