Classify the chemical equations as being balanced or not balanced.

CaO + 3C → CaC2 + CO

Na + H2O → 2NaOH + H2

4Fe + O2 → 2Fe2O3

2Mg + O2 → 2MgO

If you need 40.0 Nm of torque in order to loosen a nut on a wn need 40.0 Nm of torque in order to loosen a nut on a wheel and a mechanic has a maximum force of 133 N, how far from the nut must the mechanic apply the force loosen it?

What is the focus of an earthquake

1. The smallest shift you can reliably measure on the screen is about 0.2 grid units. This shift corresponds to the precision of positions measured with the best Earth-based optical telescopes.

the time of a collision experienced by a driver is 0.1 seconds without an air bag, with an air bag this is increased to 0.5 seconds. Explain the benefits of this detail

Which best describes the materials that make up an electrical cord? a metallic conductor lacking free electrons surrounded by a rubber insulator with free electrons a metallic conductor with free electrons surrounded by a rubber insulator lacking

Express 9.39 x 109 seconds in terms of days

What is the energy equivalent of 5.0 kg of mass? be sure to show all work to support your answer?

An ant carries food at a speed of 1 cm/s. How long will it take the ant to carry a cookie crumb from the kitchen table to the ant hill, a distance of 50 m? Express your answer in seconds, minutes and hours.

What must you know in order to determine the gravitational force between two objects?

When seen from an airplane, a rainbow sometimes forms a complete circle. When this happens, the plane's shadow is a. in the center of the rainbow. b. totally outside the rainbow. c. in the upper part of the rainbow. d. Nowhere. There is no shadow. e.