Is activated charcoal mixed with toothpaste a physical or chemical change?

Give the formula or name for the following binary acids: Hydrochloric Acid Hydrobromic Acid HBr

You have a glass of liquid and combine it with a mysterious solid and notice that over time the color changes.

At 4 degrees Celsius, pure water has a density of 1 g/mL (1 g/cm cubed). Suppose that you have 2 liters (2000 cm cubed) of pure water at this temperature. What is the mass of this water?

By what two characteristics are all the elements of the periodic table placed in

The atoms, molecules, or compounds formed in the reaction. Which part of a chemical reaction does this define? A. products B. reactants C. subscripts D. coefficients

Elements on the periodic table are arranged by increasing?

What is the difference between molecular formula and molecular model

The average kinetic energy of the atoms that make up a substance which is changing from a liquid to a solid is

What might be a scientific question? O A. One that deals with how something happens O B. One that deals with morals and beliefs O C. One that deals with likes and dislikes O D. One that deals with right and wrong

Calculate the energy released in the following fusion reaction. The masses of the isotopes are: 14N (14.00307 amu), 32S (31.97207 amu), 12C (12.00000 amu), and 6Li (6.01512 amu).