How will fragmentation affect the mass spectrum of hydrogen chloride?

Areaction is first order. if the initial reactant concentration is 0.0200 m, and 25.0 days later the concentration is 6.25 x 10-4 m, then its half-life is:

Idont understand it 1.what is the boiling point of a solution of 675 grams of ethylene glycol (c2h6o2) in 2.50 liters of water?

What is matter? a. anything that has mass and takes up space b. something that has volume and takes up space. c. things that have energy and take up space d. things that take up space but don't have mass