By studying a star's spectrum, scientists can work out its chemical make-up and temperature. What instrument do astronomers' use to carry out this task?

A) space probe

B) spectroscope

C) radio telescope

D) light telescope

que es un catalizador

Explain how metalloids relate to metals and nonmetals. A) Metalloids exhibit properties of both metals and nonmetals. B) Metalloids display aspects of neither metals and nonmetals. C) Metalloids serve as a divider between metals and nonmetals.

Why is acid important for digestion

Which of the following best represents a compound? Iron, salt, river sediment or ocean water

Since esters are cleaved on hydrolysis, the molecular weight of the acid derived from an ester is always lower than the molecules weight of the ester. however, esters are equally liquids while carboxylic acids are usually solids.

How are real gases different from ideal gases?

Which one doesnt belong in the list below? A. a meter B. one liter C. One centimeter D. one kilometer

Which elements did curies discover

When rubidium metal is exposed to air, two atoms of rubidium, Rb, combine with one atom of oxygen. If 1.98 grams of rubidium is exposed to air, what will be the mass of the product in grams

Fission reactions can get of of control without what taking place?