Why are elements sometimes called pure

What does it mean for a scientist to be accurate?

Which element is likely to be the most brittle? selenium cobalt platinum zinc

Why do volcanoes erupt?

5/10 5.00 moles of an ideal gas X was found to occupy a volume of 62.0 L at a pressure of 250. KPa and at a temperature of 100 *C. What is the value of the gas constant in? mol:K mol-K (3 sig fias) Enter the answer (1) Oops.

Atmospheric pollution is the worst when: natural gas is burned coal is burned geothermal heat is used to generate electricity

Why does conduction occur in solids and liquids easier compared to gases? Because the particles in gases are closer together and move slower Because the particles in gases are farther apart and move faster.

Write a balanced equation for the combustion of gaseous methane (CH4), a majority component of natural gas, in which it combines with gaseous oxygen to form gaseous carbon dioxide and gaseous water.

Pedro listed characteristics of two types of protists in a chart. Two Groups of Protists X Y Often multicellular Are usually autotrophic Include euglenoids Are heterotrophs Reproduce using spores Include different molds Which headings best complete

Which of the following is a characteristic of nonmetals? a. nonmetals are often shiny and hard. b. nonmetals are often malleable. c. Nonmetals do not conduct electricity. d. nonmetals are often ductile.

How does a change in temperature affect the kinetic energy of the particles in a reaction?