Which of these is a covalent compound?

A. NO2

B. LiCl

C. AlCl3

D. Na2S

What of the following inner planets is characterized by an internal structure similar to earth and the hottest of any planet

How many moles are in 3.01 x10^22 atoms of magnesium?

Which series is correctly arranged in order of decreasing radius? A. Al^3 + > Mg^2 + > Na^ + > F^- B. F^ - > Na^ + > Mg^2 + > Al^3+ C. F^ - > Al^3 + > Mg^2 + > Na^+ D. Na^ + > Mg^2 + > Al^3 + > F^-

A watermelon weighing 10 newtons is lifted 2 meters. How much work is done?

The specific heat of aluminum is 0.897 J/g•°C. Which equation would you use to calculate the amount of heat needed to raise the temperature of 0.75 g of aluminum from 7°C to 29°C? A. Q = 0.75 g x 0.897 J/g•°C x 22°C B. Q = 0.75 g x 0.

According to the following reaction, how many grams of hydrogen peroxide ( H 2 O 2 ) are necessary to form 0.182 moles oxygen gas? hydrogen peroxide ( H 2 O 2 ) (aq) → water (l) + oxygen (g)

Using the bohr model describe the changes in electrons energy and electron location when an atom changes from the ground state to an excited state.

Sally is making a model of gold for her chemistry class. She has foam balls for the protons, neutrons, and electrons. She has added 70 protons to her model so far. How many more protons does she need to add to complete her neutral atom of gold?

How many electrons are in an atoms of germanium

What is the lewis structure of N2O3?