What is the atomic number of an element?

a. The number of valence electrons

c. The number of electrons in the inner most shell

b. The number of protons in the nucleus

d. The total number of electrons

The molar mass of MgI2 is

Which best explains why greg's hands get warm as he holds a bowl of hot soup? heat energy is created from the thermal energy in greg's hands. heat energy is absorbed by the soup from greg's hands. thermal energy from the soup moves to greg's hands.

Using 25.0cm3 of aqueous lithium hydroxide, concentration 2.48mol/dm3, 2.20g of hydrated lithium sulfate was obtained. Calculate the percentage yield, giving your answer to one decimal place. 2LiOH H2SO4 → Li2SO4 2H2O Li2SO4 H2O → Li2SO4.

Calculate the pH of a solution that contains 2.4 * 10 - 5 M H 3O at 25°C. 9.38 11.60 4.62 4.17 2.40

The mass of the products of a chemical reaction will be

What common household element can, over time, reduce airflow, insulate components, reduce heat exchange or even cause the system to hang or reboot?

Clouds that form at an elevation of 3 kilometers will most likely be composed of A) raindrops B) ozone C) ice crystals D) sleet

Describe how glacial erosion influenced the topography of Ohio.

Which of the answer choices lists a compound? h2, h2o, NaCl, or O2

What is earths water called