Nigtrogen and hydrogen combine to produce ammonia.

N2+H2? NH3

Which set of coefficients balances the equation?

A) 1,1,1

B) 1,1,2

C) 1,3,2

D) 2,3,2

When electrons are transferred between two atoms, a covalent bond is formed. true or false

6. The four main systems of the Earth are A. geology, meteorology, oceanography, and chemistry. B. geosphere, atmosphere, hydrosphere, and aerosphere. C. aromatherapy, biology, chemistry, and physical properties. D.

joe forgot his homework at home. he runs home to get it. he accelerates from 0 to 15m/s in 5 seconds, runs at 15m/s for 50 seconds, and then slows down from 15m/s to a stop in 3 seconds. what is the acceleration

Resistance and length of a conductor are: A. directly proportional B. inversely proportional C. seldom proportional D. not proportional

How much does the element Radon cost per pound

Cho is using technological design to build a clock based on the apparent motion of the Sun. Which of the following would be the best measure of success for Cho's clock? A. Cho's clock works even at night. B.

Suppose that a car traveling to the west (-x direction) begins to slow down as it approaches a traffic light. Make a statement concerning its acceleration. a) The car is decelerating and its acceleration is positive.

What are the moons of the outer planets made of, and how is their composition different from that of our Moon?

What is the main difference between geocentric and heliocentric models of the solar system

A flywheel in a motor is spinning at 530 rpm when a power failure suddenly occurs. The flywheel has mass 40.0kg and diameter 75.0cm. The power is off for 39.