Which of the following is considered an ignition source?

A: all answer choices are source of ignition

B: Cutting and welding

C: Lightning

D: Open flames

Which of the choices below gives a true example of how a natural resource can be renewed?

Why is one side of a single water molecule partially negative while the other side is partially positive? a. Electron pairs are unevenly shared between the oxygen atom and the two hydrogen atoms. b. Hydrogen donates its electrons to oxygen. c.

How many moles of S2F10 are contained in a pure 128-gram sample of S2F10?

What is the gram formula mass for Mg (OH) 2

Apply the concept of density to explain why oil floats on water-

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.