The chemical equation below shows the combustion of propane (c3h8). C3h8 + 5o2 right arrow. 3co2 + 4h2o the molar mass of oxygen gas (o2) is 32. 00 g/mol. The molar mass of c3h8 is 44. 1 g/mol. What mass of o2, in grams, is required to completely react with 0. 025 g c3h8? 0. 018 0. 034 0. 045 0. 91.

An ecosystem is shown in the illustration. assume that human activities have led to a decrease in the number of eagles. a virus attack on rabbits has led to a decrease in their population in the ecosystem. which two sentences describe likely effects on the ecosystem? 1. there’s an increase in the number of snakes and insects and a decrease in the number of frogs. 2. there’s an increase in the number of snakes and insects, and the storks face increased competition for food. 3. there’s an increase in the number of storks and a decrease in the number of snakes and insects. 4. there’s an increase in the number of frogs and a decrease in the number of storks and insects. 5. there’s a decrease in the number of snakes, insects, and frogs.

Which statement best describes gravity? it is the force that repels only very small objects. it is the force that acts between objects with zero mass. it is the force that sometimes acts only on very large objects. it is the force that acts between any two objects in the universe.

One osha preferred method to control absestos dust during brake and cluth repair and service is the negative pressure enclosure/hepa vaccum system method