Which of the following is NOT a characteristic of most ionic compounds?
When dissolved, they conduct an electric current.
They have low melting points
They tend to be solids
They are usually composed of metallic and nonmetallic elements
Which of the following particle(s) is/are responsible for atoms bonding?
Valence electrons
Protons
Neutrons
Positrons
What is lost from the nucleus of an atom when it emits an alpha particle?
two protons and two electrons
two protons and two neutrons
two neutrons only
two protons only
Answers: 3
Chemistry, 22.06.2019 06:30
Predict whether the changes in enthalpy, entropy, and free energy will be positive or negative for the boiling of water, and explain your predictions. how does temperature affect the spontaneity of this process?
Answers: 1
Chemistry, 22.06.2019 06:30
The following reaction shows sodium carbonate reacting with calcium hydroxide. na2co3 + ca(oh)2 → naoh + caco3 how many grams of naoh are produced from 20.0 grams of na2co3? (molar mass of na = 22.989 g/mol, c = 12.01 g/mol, o = 15.999 g/mol, ca = 40.078 g/mol, h = 1.008 g/mol) 12.2 grams 15.1 grams 24.4 grams 30.2 grams
Answers: 2
Chemistry, 23.06.2019 04:00
Achemical reaction is done in the setup shown , resulting in a change of mass. what will happen if the same reaction is done in a sealed container that is placed on the electronic balance?
Answers: 2
Which of the following is NOT a characteristic of most ionic compounds?
When dissolved, they condu...
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