What are four things that a chemical change probably happened

Question 25 a chemist determined by measurements that 0.020 moles of mercury participated in a chemical reaction. calculate the mass of mercury that participated in the chemical reaction. round your answer to 2 significant digits.

What is the place of metalloids in the periodic table?

Convert 7.680 moles of PtSe to grams

How are concentration and chemical reaction rate related?

What do you add to a base to weaken it

In an acid-base titration, of 20 ml of a m HCI solution with 1 m NaOH. How many ml of NaOH are needed

Which of the following is not a source of air pollution related to human activities

Objects and substances in motion is I

If you were to remove an electron from a sodium atom that has eleven protons, what would be the electrical charge of the ion?

The atomic mass of fluorine in 19.0 amu, so the molar mass is?