Enter the symbol of a sodium ion, Na+, followed by the formula of a sulfate ion, SO42-. Separate the ions with a comma only-spaces are not allowed

To support life, why must a planet have roughly circular orbits around a star?

Which element (s) are not balanced in this equation? Fe2O3 + 3 CO → Fe + 3 CO2 A. Only the Fe is unbalanced. B. Only the O is unbalanced C. Fe and O are both unbalanced. D. C and O are both unbalanced

Which of the following is a scientific question about the cuttlefish? O A. How does the cuttlefish change its colors? O B. Are cuttlefish better than other kinds of fish? O C. How did the cuttlefish get its name? O D.

A solution that contains the maximum amount of solute that is soluble at a given temperature is said to be -

What does the electron sea model for metals suggest? A) valence electrons drift freely around the metal anions B) valence electrons are anchored to specific metal cations C) valence electrons drift freely around the metal cations D) electrons idle

Which layer of the earth can only be studied by indirect means

Is Euglena heterotroph or autotroph

What is the mass of 5000. atoms of silicon

Which coefficients balance this equation? _CH4 + _O2 - > _CO2 + _H2O A. 1, 1, 1, 1 B. 1, 1, 2, 1 C. 1, 2, 1, 2 D. 2, 1, 2, 1

Student B pushed on a cart against the wall with 500 N of force. The cart didn't move. How do u explain what happened?