Earthquakes are vibrations of Earth's crust. Which of the following is used to

measure the size of an earthquake?

a. barometer

b. Doppler radar

C. depth scale

d. Seismograph

Lead is not used for preparing hydrogen by treating it with dilute sulpheric acid

Which of the following is an electrolyte? a. sodium chloride c. water b. sugar d. glass

Suppose an aqueous mixture is prepared containing magnesium sulfate (mgso4), copper (ii) sulfate (cuso4), metallic magnesium, and metallic copper. what reaction, if any, will occur?

Which explains why carbon is a component of so many elements? A. It appears in more than one form B. It is the most abundant element C. It can react with both metals and nonmetals D. It can form stable compounds with other elements

Salt are know as atom elements covalent compound ionic compound

How much ice at a temperature of - 17.5 ∘C must be dropped into the water so that the final temperature of the system will be 31.0 ∘C?

Why does a gas fill completely the vessel in which it is kept?

Individuals who work full time and those who work part-time enjoy basically the same number of paid leave benefits. True False

There is a large increase in ionization energy between the second and the third ionization energies of a metal. What kind of ion is the metal likely to form? Include the charge in your answer.

Which of the following are true statements about equilibrium systems? For the following reaction at equilibrium: CaCO3 (s) ⇌ CaO (s) + CO2 (g) adding more CaCO3 will shift the equilibrium to the right.