What are the 5 signs of chemical change?

Which of the following most likely explains why the chemical symbol for calcium is Ca? The symbol C was already used for carbon. The element is named after the Latin word for calcium. The symbol was assigned by modern alchemists.

Why is there no change in the temperature when the process of melting takes place? A). Because the supplied heat is used to overcome the force of attraction between the molecules. B).

Kelly ran electricity though a sample of water using electrolysis. The water changed into two gases, X and Y. It was not possible to break down the gases X and Y into simpler particles. Which statement is best supported by this evidence?

If you have 5.2 moles of iron (Fe) how many grams do you have?

The steps of the scientific method must be followed in order every time an experiment is carried out. Question 20 options: True False

Silver chromate is sparingly soluble in aqueous solutions. the ksp of ag2cro4 is 1.12 * 10-12 m3. what is the solubility (in mol/l) of silver chromate

What do you think 1,5-pentanedithiol C5H12S would smell like

If an atom has sp hybridization in a molecule: the maximum number of σ bonds that the atom can form is

What is an oxidizing agent?

In times of hot dry weather some cities ban the use of garden sprinklers why do you think there is such a rule