Atoms of elements that are in the same group have the same number of

a-protons

b-neutrons

c-valence electrons

d-protons and neutrons

Which of the following compounds is a covalent (i. e., molecular) compound? Which of the following does not represent a molecular compound? A. CS2 B. BaI2 C. N2O4 D. PCl3

Problems such as crazing cracks and skill are the result of improper

You have a mixture that contains 0.380 moles of Ne (g), 0.250 moles of He (g), and 0.500 moles CH4 (g) at 400 K and 7.25 atm. What is the partial pressure of He? 1. 1.60 atm 2. 3.21 atm 3. 3.63 atm 4. 2.44 atm

10. If a reaction has ΔS = - 100 J/K and is spontaneous, what must be true of the surroundings? A) ΔSsurroundings > 100 J/K B) ΔSsurroundings > - 100 J/K C) ΔSsurroundings = 100 J/KD) ΔSsurroundings < - 100 J/K E) ΔSsurroundings < 100 J/K

Select the substance that is thought to be partially responsible for depleting the concentration of ozone in the stratosphere.

Witch type of crust is thick and contains granite

A chemical base may be defined as a compound which contributes hydroxide ions or increases the OH concentration when dissolved in water. True False

Correct name for LiCl

What is anisotropy. Explain briefly with example.

Which is measured using a calorimeter