Consider the reaction

B (s) + 32O2 (g) →B2O3 (s), ΔH = - 1270kJ

What will ΔH be for the reaction if it is reversed?

Express your answer with appropriate units.

At what distance would radiation cease completely

An isotope of sulfur has an atomic mass or 32 amu. how many neutrons does it have?

Drag each label to the correct location on the chart. Match each empire to the conditions after its fall.

How many grams of Zn could be extracted from 300. g of ZnS

Label each description as ionic, covalent, or both. Atoms share pairs of electrons: Atoms transfer electrons: Atoms have electrostatic attraction: Atoms bond together:

What conclusion can be drawn from the statement that an element has low electron affinity, low electronegativity, and a low ionization energy?

A scientist performs an experiment in which a radium-226 (Ra-226) atom decays into radon-222 (Rn-222). The scientist concludes that some energy must have been added to the system to cause this reaction to begin.

Which suitable method can be used to separate a mixture of sand and paraffin

How many vowels does the word love have

What is silicon used for? -matches -gunpowder -glass -steel can coating