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Chemistry
Amir
Which statement best describes the lattice structure of solid sodium chloride?
A. Each sodium ion is surrounded by one chloride ion.
B. Each chloride ion is surrounded by two sodium ions.
C. Each chloride ion is surrounded by four sodium ions.
D. Each sodium ion is surrounded by six chloride ions.
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The empirical formula of a compound is CH3O. What is the molecular formula if the mass is 62.0g/mole?
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C + O2 - -> CO2 + 60kJ
is the reaction exothermic or
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All of the following can be used to define an acid except
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a substance that increases the hydronium ion concentration of a solution
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Sterling silver is an alloy of silver made up of around 93% silver and 7% other metals, such as copper, all blended together to form the substance. What type of mixture is sterling silver?
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A 100 kg tree gets struck by lightning and is burned completely to ash. A scientist gathers up all the ash and weighs it to find only 90kg there. Where did the other 10kg go?
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How would the strength of an electromagnet be affected if its 1.5V battery is replaced by a 9V battery while using the same nail and coil?
1 - the change would not affect the magnetic field
2 - the magnetic field strength would decrease
3 - the magnetic field strength would increase
4 - The magnetic field would change direction more frequently
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What is the mole ratio of oxygen to aluminum?
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What element is black soot made of?
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Is corrosion of aluminum metal a chemical or physical process
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In the reaction 2k + 2h2o → 2koh + h2, which compound has an element ratio of 2 : 1? h2o h2 k koh
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