The atomic mass of carbon-13 is 13. It has six protons. How many neutrons does this isotope have? 6 7 13 19

Which of the following has a crystalline structure? air a copper gold alloy sugar water saltwater

Which are disadvantages of renewable resources? Check all that apply.

Describe in words a typical temperature vs time graph for the evaporation of a liquid.

Give three properties of a Solid

If an automobile travels 215 mi with a gas mileage of 20.5 mi/gal, how many kilograms of co2 are produced? assume that the gasoline is composed of octane, c8h18 (l), whose density is 0.69 g/ml.

Which microscope came out first

Which exerts greater pressure on the floor-standing flat-footed or standing on tiptoe? on tiptoe, because the force acts over less area on tiptoe, because the force acts over more area flat-footed, because the force acts over more area flat-footed,

1. Sara tells Michael she is 160 centimeters tall, while Michael says he is 60 inches tall. If there are 2.54 centimeters in an inch, who is taller

How do you tell if a compound is polar or non polar

What two ions are central to the arrhenius definitions of acids and bases?