What is the amount of protons neutron and electrons in the element Calcium?

Explain why sharpening a pencil is different type of physical change than freezing water to make ice cubes

Which of the following characteristics is not a property of an acid? a. has a sour taste b. accepts an H + ion c. may cause damage to buildings, statues, and rivers d. increases the concentration of hydronium ions in an aqueous solution

14 Copper (II) oxide reacts with hydrogen. CuO + H2 → Cu + H2O Which row is correct? oxidising agent reducing agent A H2 Cuo B Cuo H2 с H2O Cu D Cu H20

Given the equation: butanoic acid + 1-pentanol catalyst water + X To which class of organic compounds does product X belong?

If you were asked to go to the chemical storage area and retrieve a bottle of "sulfate," could you do so? Explain. (Assume you have permission from your teacher to go into the storage area.)

How many valence electrons in Al3+?

What can be done to make an solid solute dissolve faster in a liquid solvent

Why does the water cycle happen fast in some places and slowly in other places?

Why does the mood have phases

According to Arhennius, which of the following is a base? * A. HCl B. HNO3 C. NaCl D. NaOH