Which is and element

A) Salad

B) Sugar

C) Water

D) Potassium

Which of the following is a mixture? A. sugar B. water C. soil D. salt

Is barium malleable, ductile or brittle?

When you heat up an object, the particles in the object move which way?

You have an aqueous solution with a ph of 8.0. You add sodium chloride to a concentration of 1 gram per 100 milliliters. What happens to the ph?

Which statement describes a periodic trend of atomic radius? O A. It tends to decrease from left to right across a period. O B. It remains the same within a period. O c. It remains the same within a group. O D.

What experiments did Lavoisier do?

if an atom has 4 protons, 5 neutrons, and 4 electrons, what is the mass number of this atom? How do you know?

What volume of hydrogen gas can be produced by reacting 4.20 g of sodium in excess water at 50.0 Celsius and 106 kPa? The reaction is 2Na + 2H20 - - > 2NaOH + H2.

Is athletes foot abiotic or biotic?

What are the mole fractions of HNO3 and water in a concentrated solution of nitric acid (68.0% HNO3 by mass) ? (a) Outline the steps necessary to answer the question. (b) Answer the question