50g of water is placed into a beaker. the mass of the beaker is now 115g. what is the mass of the empty beaker?

1. Which color is absorbed and which is reflected by the leaves of most plants? A. Green and violet are reflected; red is absorbed. B. Red and blue are absorbed; green is reflected. C. Blue and green are absorbed; red is reflected. D.

A gas has a volume of 6.6 L at a temperature of 40 C. What is the volume of the gas if the temperature changes to 15 C?

Name 3 sets of elements that have been added to the periodic table since mendeleev's time

How does the arrangement of the particles in a solid compare to that of a liquid? ( The arrangement of a solid's and a liquid's particles is the same. The particles in a solid are farther apart than the particles in a liquid.

Ultraviolet rays from the sun can cause a. serious burning of the skin b. damage to the eyes c. both serious burning of the skin and damage to the eyes d. neither serious burning of the skin nor damage to the eyes

The electron configuration 1s22s22p63s23p6 represents which noble gas?

What are some disadvantages of incinerators?

What mass of potassium chlorate would contain 40grams of oxygen?

Identical forces act for the same length of time on two different masses. The change in momentum of the smaller mass is A) smaller than the change in momentum of the larger mass, but not zero. B) zero.

How many nuclei of 238 92 U 92 238 U remain in a rock if the activity registers 290 decays per second? (Note that the half life of Uranium-238 is 4.468x109 years)