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Chemistry

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Marta Bins

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Cards in this guide (11)
Are exothermic reactions decomposition reactions or are they synthesis reactions

Synthesis reactions are generally characterized by being exothermic. Decomposition reactions are usually endothermic.

Solid metals undergo greater thermal expansion than liquids do

false

True or false The concentration of an acid or base refers to how completely it dissociates in water

false

The of an acid and a base is determined by how completely they dissociate in water

The _____________ of an acid and a base is determined by how completely they dissociate in water.

strength

What amount of acid or base dissolved in water called

the concentration

Which of the following is an example of redox reaction-

Redox reaction is chemical reactions. This happens when atoms oxidation state changes.

Which one of the following is an example of a strong acid

Hydrochloric acid -APEX;)

Which one of the following is a balanced equation

2NH3(g) + 3Mg(s) —> 3H2(g) + Mg3N2(s)

Which of the following Are elements in this equation 2Mg (s) O2 (g) 2Mg0 (s)

Mg (magnesium) and O2 are elements.

Changing subscripts is one of the steps of balancing a chemical equation.

false

A steep slope on a phase change graph indicates

Heirhey

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