In an experiment, 1 mol of propane is burned to form carbon dioxide and water.

C3H8 + 502 3C02 + 4H20

1. How many moles of oxygen are needed for the reaction?

A 3 mol

B 1 mol

C 5 mol

D 10 mol

A news anchor at a city television station was asked by a rural food bank to speak at its annual fund-raiser. Even though the fund-raiser was being held in a distant town, she agreed and began trying to find out all she could about her audience.

Suppose you have an unknown clear substance immersed in water, and you wish to identify it by finding its index of refraction. You arrange to have a beam of light enter it at an angle of 45.0º, and you observe the angle of refraction to be 40.3º.

Changed velocity in a circuit a. conductor b. insulator c. transformer d. generator

the sun on average is 93 billion miles from earth. how many meters is this? express it using power of ten and using a metric prefix (km)

A spring is pulled to 10cm and held in place with a force of 500N. What is the spring constant of the spring

you often hear people particularly TV announcers talk about "high rate of speed" what do you think they mean according to the specifics of physics definitions what are they really saying

What is the value of x in the equation Ix - 3y = 30, when y = 15?

32. How much work is done pushing an 80 N box 2 m across ue surtout What work is done? a. 40 J c. 160 J b. 20 J d. 240 J

Which is a resource that the National Park Service manages? A. memorials B. wildlife refuges C. ecosystems D. endangered species

Write two examples (mathematical expression) of physical laws that change inversely with the square of the distance.