How is the number 3.91 x 10 - 4 expressed in regular numbers?

A. 0.3910000

B. 0.0000391

C. 0.0391

D. 0.000391

Condensation is a chemical reaction that releases

Unbalanced forces can cause an object change its motion in three ways. What are they?

In a certain experiment 10.0g of magnesium nitride is allowed to react with 5.00 g of water. Calculate the final mass of ammonia, water, and magnesium nitride at the end of the reaction.

Which process is most responsible for creating the Earth's magnetic field? A. the motion of the Moon as it revolves around the Earth B. the movement of the Earth through space C. the impact of charged particles from the Sun D.

The scrapyard uses a big electromagnet to move around large metal objects such as cars and appliances. If the operator needed to drop a car to a new space, what would he need to do for this to happen?

For each solute, identify the better solvent: water or carbon tetrachloride

If an element has 43 electrons, 56 neutrons, and 43 protons, what is its approximate atomic mass?

What did the Cherokee do to assimilate? Check all that apply They invented a writing system. They resisted white settlement. They wrote a constitution. They planted cotton and farmed.

Which of the following correctly compares the radii of Cl and Cl-? Cl has a larger radius than Cl - because Cl has an additional energy shell. Cl has a smaller radius than Cl - because Cl has an expanded electron cloud.

When a stretched string is vibrated up and down with a particular frequency, it causes a standing wave to be produced.