What is the molecular mass of magnesium chloride, MgCl2?

(how do you get to the answer as well)

Your father used weigh 484 N. What was his mass (to the nearest tenth) ?

You accidentally drop your ring into a graduated cylinder. the ring has a mass of 5 grams and the water level of the cylinder rises from 5mL to 7.5mL. what is the density of the ring?

What relationship exists between speed, velocity, and acceleration

Suggest why it might be a good idea to reduce the pressure of the air in car tyres if the car is to be driven over soft sand or over snow.

Yellow light with a wavelength of 5.89 x 10-7m travels through quartz glass with a speed of 1.94 x 108 m/s. What is the frequency of the light? A) 3.29 Hz B) 3.04 x 10^-15 Hz C) 30.36 Hz D) 3.29 x 10^14 Hz

A car moved at a speed of 50 kilometers/hour. Its kinetic energy is 400 joules. If the same car moves at a speed of 100 kilometers/hour

What are the methods of heat transfer?

Which represents a deletion of the section of DNA shown here, a-c-t-g-g-a-t? A. A-c-t-a-t B. A-c-t-c-g-a-t C. A-t-c-t-g-g-a-t D. A-c-t-c-c-t-t

If a lamp has a resistance of 50 ohms and is operated by a p. d. of 10V, find the current flowing through it

The amount of energy in the universe is ... A) changing rapidly B) changing slowly C) barely changing at all D) remaining constant