Mg +  __HCl  → MgCl2 + H2

What coefficient is needed to balance the equation?

Which of these will reflect light with the highest frequency? O O O O an orange basketball a blue candle a green ribbon a yellow banana

What type of power plant is virtually pollution free

A hammer is dropped on PlanetX. If the hammer has a mass of 3kg and a weight of 9n, what is the gravitational acceleration of Planet X and is it more or less than that of earth?

Here is a widely publicized, true story about how failing to convert units resulted in a huge loss. in 1998, the mars climate orbiter probe, instead of entering orbit, crashed into the surface of mars.

Pluto's orbit sometimes causes this planet to be the ninth, and not the eighth, body from the Sun. a. Uranus c. Neptune b. Saturn d. Jupiter

Is a lung a living organism, why or why not?

A wire carries a steady current of 2.20 A. A straight section of the wire is 0.750 m long and lies along the y axis within a uniform magnetic field, vector B = 1.70 k T.

A 5.00-kg howler monkey is swinging due east on a vine. It overtakes and grabs onto a 6.00-kg monkey also moving east on a second vine. The first monkey is moving at 10.0 m/s at the instant it grabs the second, which is moving at 7.00 m/s.

One of the heating systems we talked about in this course comprises of a system of ducts. What is the process by which heat is transferred in this system? a. Conduction b. Convection c. Radiation d. None of the above

If the north pole of a magnet in a compass is attracted to Earth's geographic north, what must be the polarity of Earth's magnetic north pole? A. north B. south C. It can't be determined from the information given.