If I have 6.02x10^23 atoms of silicon, how many grams of silicon do I have?

What are the four observations that confirm that a chemical reaction is happening?

Qualitative and Quantitative

A mixture of carbon dioxide and oxygen gases at a total pressure of 942 mm Hg contains carbon dioxide at a partial pressure of 720 mm Hg. If the gas mixture contains 11.6 grams of carbon dioxide, how many grams of oxygen are present?

If an atom has lost or gained electrons, would the charge of the ion go in the lower left or the upper right?

Which statement about climate is true? A. The climate of an area can change from one day to the next. B. Climate is atmospheric conditions in an area over a long period of time. C.

A hurricane and a typhoon are the same thing true or false?

Identify the element that chlorine forms a covalent bond with

A child pulls a sled up a snow-covered hill. The child does 405 J of work on the sled. If the child walks 15 m up the hill, how large of a force must the child exert?

A piece of glass with a mass of 32.50 g specific heat of 0.840 J/g*°C and an initial temperature of 115 °C was dropped into a calorimeter containing 57 g of water (specific heat 4.184 J/g*°C).

Which of the following is the most likely description of the product or products of a double-displacement reaction? A) one new compound B) two new compounds C) oxygen and energy D) one new compound and an element