Which of the follwing is a pure substance: sugar, salt, water, or pepper? Explain how you know.

When a pot of water sits on a hot stove, the metal pot is heated, and then transfers its heat to the water. A student claims that conduction is the only type of heat transfer occurring. Which statement explains why the student's idea is incorrect? a.

Can you have s*x with an elephant?

When the equation below is correctly balanced, what are the coefficients of Pb and H20, respectively? Pb + H2O + O2 = > Pb (OH) 2 A. 1,2 B. 2,1 C. 2,2 D. 1,1 E. none of these

Which description identifies the correct charge of each atomic particle? A. electron = positive; proton = negative; neutron = no charge B. electron = negative; proton = positive; neutron = no charge C.

The idea that all living things are made up of cells is considered scientific law. This means the idea a) is an emerging scientific idea that has a logical explanation. b) has been tested with similar results at least twice.

Explain why a balloon filled with O2 at room temperature collapses when cooled in liquid nitrogen where as balloon filled with He does not

Which mixture can be separated by using the equipment shown below?

El agua de Mar es una mezcla homogenea o disolucion Y El agua corriente Y El aire Y LA lejia Y Los refrescos con gas Y El suero fisiologico Y Las monedas Y LA leche Y LA gelatina Y Los productos de higiene Y El merengue

The component which dissolves in a solution is called the ...

If this fossil is 65 million years old, what could this fossil suggest about organisms alive today? A. If it is similar to any two modern species, it could be a common ancestor of these species. B.