What is true about the vapor pressure of a liquid

A 70.0-g piece of copper metal at 86.0 ∘c is placed in 50.0 g of water at 16.0 ∘c. The metal and water come to the same temperature of 24.0 ∘c. What is the specific heat, in j/g∘c, of copper?

A nitrogen atom has five valence electrons. The Lewis structure shows how a nitrogen atom bonds with three hydrogen atoms to form an ammonia molecule, NH3. How many valence electrons does the nitrogen atom have in this ammonia molecule?

Which of these is a compound? salt water salad carbon dioxide or potassium

How many electrons are in the π system of the ozone molecule, o3?

Which of the following is an example of pseudo science? (choose one, not two) A. Biology B. Astrology C. Chemistry D. Physics E. Medicine (I know it's labeled as Chemistry, but there's no selection for "Earth Space Science")

1.87e3 m + 24 m + 5.43e-1 km + 1.561e2 km = km

Which 2 continents have the most obvious fit of the coastlines. subject science

A substance with a ph of 6 is called

56 Explain, in terms of atomic structure, why the elements in Group 2 have similar chemical properties. 131

What must molecules do to react? a. Molecules must heat up b. Molecules must collide c. Molecules must expand to fill their container d. Molecules must interact with a catalyst