Answer:
CaO
how:
since its an iconic compound (metal(Ca)+non-metal(O)=iconic(CaO) we have to take account the charges
so;
now we will cross them
since both the values are same will cross it out.
hence: CaO
According to the research, levers are used to modify or generate a force and transmit displacement.
<h3>What are levers?</h3>
It is a simple machine composed of a rigid bar of some moderately resistant material, which rotates freely on a support point.
It can be used to maximize the mechanical force applied to an object, increasing its speed or the distance it travels, by applying a proportionally smaller amount of force.
Therefore, we can conclude that according to the research, levers are used to modify or generate a force and transmit displacement.
Learn more about levers here: brainly.com/question/19732425
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Answer:
Make an observation.
Ask a question.
Form a hypothesis, or testable explanation.
Make a prediction based on the hypothesis.
Test the prediction.
Iterate: use the results to make new hypotheses or predictions.
Molecular weight = 2 * vapour density at STP.
Answer:
Ion-ion force between Na+ and Cl− ions
London dispersion force between two hexane molecules
Explanation:
"Ion-dipole force between Na+ ions and a hexane molecule
" does not exist since hexane has only non-polar bonds and therefore no dipole.
"Ion-ion force between Na+ and Cl− ions
" exists since both are ions.
"Dipole-dipole force between two hexane molecules
" does not exist since hexane molecules do not have a dipole.
"Hydrogen bonding between Na+ ions and a hexane molecule
" does not exist since the hydrogen in the hydrogen bond must be bonded directly to an electronegative atom, which hexane does not have since it is a hydrocarbon.
"London dispersion force between two hexane molecules" exist since hexane is a molecular compound.
