Is the Zeff of an element always equal to the number of valence electrons?

Why is there a vast amount of salt water on Earth? Salt is the most common mineral on Earth. Salt's crystal form is found at the bottom of all oceans. Salt is an excellent solvent. Water is an excellent solvent.

What is the name of the following ionic compound?: MoAs

If a solute in water has a concentration of 0.12 mg/mL and has a concentration in ether of 0.60 mg/mL, what is the distribution coefficient, K, between ether and water

1. Which of the following particles are free to drift in metals? O neutrons O cations O electrons O protons

When carbon is burned in air, it reacts with oxygen to form carbon dioxide. When 13.2 g of carbon were burned in the presence of 53.9 g of oxygen 18.7 g of oxygen remained unredacted. What mass of carbon dioxide was produced?

A 25 N and 5 N force pull to the right. Friction is 10 N. If the object is 5 kg, find the net force and acceleration.

What properties of matter are intensive independent of their size

What is the density of an object having a mass of 8.0g and a volume of 25cm3

What is a Cilla? (In drawing)

Which term names the group of organisms able to interbreed and produce fertile offspring?