An atom of potassium has 19 protons and 20 neutrons. what is its mass number?

what is Calcite's Solubility, I barely know what solubility mean let alone what it has to do with Calcite.

Vinegar is an aqueous solution of acetic acid, ch3cooh. a 5.00 ml sample of a particular vinegar requires 26.90 ml of 0.175 m naoh for its titration. what is the molarity of acetic acid in the vinegar?

Which one of the following chemicals is most likely coming from the gas stove? a. carbon monoxide b. mercury c. radon

What does every chemical reaction involve? A change in state. A change in mass. A change in energy. A change in concentration.

What is the Octet rule?

You are given two acidic solutions of equal concentration and volume: hcl (aq) and hf (aq). which solution would dissociate more fully and produce more h3o + ions?

Solid solution of a metal or nonmetal dissolved in a metal

Which item is not commonly recycled?

A weak base is added to water. Which information is required to find the strength of its conjugate acid?

5) Which of the elements have a charge of 2-, as determined by their locations on the periodic table?