Which statement defines the enthalpy of hydration?

A 2.5 g copper penny is given a charge of 4.0x10-9 c. how many electrons are removed from the penny?

Match each vocabulary word with its definition. 1. the nuclide produced from a radioactive decay daughter 2. the difference between the mass of a nucleus and the sum of masses of its components parent 3. any isotope of an element mass defect 4.

Lactose (milk sugar) is a carbohydrate that is formed by combining galactose and glucose. Which term best describes this molecule? monosaccharide disaccharide monomer starch

One side of a cube is 5 cm long. what is the cubes volume

How many formula units are in 3.3 moles of NaCl?

What size container do you need to hold 0.0459 mol of N2 gas at stp

What happens when two or more atoms react?

If cobalt metal is mixed with excess sulfur and heated strongly, a sulfide is produced that contains 55.06% cobalt by mass. Calculate the empirical formula of the sulfide.

Calcium's atomic number is 20. it forms ions with 18 electrons. what is the electrical charge of a calcium ion?

The doldrums region on Earth is created by an amount of heating from the Sun that results in the rising of warm, moist air, low air pressure, cloudiness, high humidity, and numerous forms of severe weather, such as thunderstorms.