Which mass measurement contains four significant figures?

A) 0.086 g

B) 0.431 g

C) 1003 g

D) 3870 g

A compound is 42% sodium, 19% phosphorus, and 39% oxygen by mass. What is the empirical formula of this compound? Na3PO4 NaPO Na9P4O8 Na4P3O

If Shane and Susan both push on a box with a force of 25N, but in opposite directions, what will happen to the box? A) The box will not move. B) The box will slide toward Shane. C) The box will slide toward Susan.

Electron configuration is a description of the shells, subshells, and orbitals occupied by electrons? True or false

The moon is close to the earth

Which of the following processes has a negative ΔS? (A) evaporating 1 mol of a liquid (B) raising the temperature of 1 L of water from 295 K to 350 K (C) freezing of 1 mol of a liquid (D) None of the above

Which statement describes thermal energy? the energy that is associated with electric fields the energy that is stored in chemical bonds the energy that is associated with the pull of gravity the energy that is associated with temperature

Give the formula %error = theoretical value - experimental value / theoretical value * 100 calculate the percent error for the experiment.

A baker touches a pie right after taking it out that of me which statement best explains why the pie feels hot

A scientist discovers a new type of polymer. What must be true about this polymer? A. It contains carbon atoms arranged in a ring structure. B. It has double bonds between all the carbon atoms. C. It contains molecules of many different types. D.

A line in the lyman series of hydrogen has a wavelength of 122 nm. from what state did the electron originate?