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

The ability of water to draw itself up and hold the shape of a wave is the result of which physical property? density thermal conductivity cohesion adhesion

What identifies an element on the periodic table?

Single-replacement reactions can take place with nonmetals. For this question, assume that A and C are nonmetals and B is a metal. Which general equation shows one nonmetal replacing another nonmetal in a compound?

What is the energy change that will occur when 25.5 grams of oxygen gas (O2) react with excess methane (CH4) according to the reaction below? CH4 + 2 O2yields CO2 + 2 H2O delta H = - 889 kJ/mol Select one: a.

Using the reagents below, list in order (by letter, no period) those necessary to prepare compound B from propene (show the addition of the CN before electrophilic addition reactions with the alkene). Note: Not all spaces provided may be needed.

What do you need in order to do a stoichiometric calculation? (Choose multiple) Balanced Chemical Equation Molar masses of compounds involved The type of reaction taking place Oxidation Numbers

The correct mathematical expression for finding the molar solubility (s) of sn (oh) 2 is:

18. which bond is most polar? H--F H--Cl H--Br H--I

What kind of reaction is ca (s) + h3po4 (aq) ca3 (po4) 2 (s) + h2 (g)

In the teapot dome scandal, what did the secretary of the interior albert fall lease