List two general properties of molecular compounds
Answers
Molecular compounds often have lower melting and boiling points. Ionic compounds cannot conduct electricity when they are in a solid form.
What are molecular compounds?
Any substance made up of similar molecules with atoms from two or more different chemical elements is referred to as a chemical compound. Atoms from more over 100 specific chemical elements, both in their pure forms and when mixed to form chemical compounds, make up all matter in the universe.
For instance, the atoms that make up carbon differ from those which make it up iron, which differ from the ones that make up gold. Molecular compounds often have lower melting and boiling points. Ionic compounds cannot conduct electricity when they are in a solid form.
Therefore, molecular compounds often have lower melting and boiling points. Ionic compounds cannot conduct electricity when they are in a solid form.
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Low melting points and boiling points. ...Low enthalpies of fusion and vaporization These properties are usually one or two orders of magnitude smaller than they are for ionic compounds.Soft or brittle solid forms. ...Poor electrical and thermal conductivity.
Related Questions
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Which diagram below shows the pathway of energy through an ecosystem? A.producer → carnivore → herbivore B.producer → herbivore → carnivore C.herbivore → producer → carnivore D.carnivore → herbivore → producer
would you select water or gasoline to try dissolving the following : table sugar, motor oil, rubber from tire marks, adhesive residue from a packing tape
Calculate the number of grams of CH_3COOH in the vinegar.
Which statement is true about this reaction?
(1) It is exothermic and DH equals -91.8 kJ.
(2) It is exothermic and DH equals +91.8 kJ.
(3) It is endothermic and DH equals -91.8 kJ.
(4) It is endothermic and DH equals +91.8 kJ.
Answers
Endothermic processes: are those in which occurs the absorption of heat.
the change of enthalpy (ΔH) is greater than zero.
hope this helps!
Answers
1) The Universal gravitaional law, stated by Sir. Isaac Newton, states that the force of gravitational attraction between two objects is directly proportional to the product of their masses and inverse to the square of the distance that separates their centers.
2) Mathematically, it was expressed in this form:
F = G × m₁ × m₂ / d².
where G is the proportinality constant, m₁ and m₂ and the masses of the objects, and d is the distance that separates the centers of the two objects.
3) Then, the answer is that the greatest for of gravitaional attraction is:
- that of the two objects for which the product of the masses is the greates (assumin same distance between them), or
- that of the two objects that are closer (assuming the product of the masses is the same).
Those requirements are met perfectly by a black hole.
Answers
A nuclear change changes the element completely and forms new elements, so nuclear is a wrong choice.
A phase change only changes the phase of the element (solid, liquid or gas) but does not change structure, so phase is a wrong choice
A physical change does not change the structure of the molecules, so physical is also a wrong choice.
On the other hand, a chemical change changes the structure of molecules and/or breaks/forms bonds.
Therefore, the right choice is chemical.
Answer:
1) Chemical
Explanation:
A only
A and B
C only
D only
Answers
Answer: D only.
Explanation:
The amount of Earth's water located in oceans is 97%. Rest 3% is in the form of rivers, glaciers, polar ice-caps, lakes and ground water. Out of this 3% also, only 0.3% is freshwater which found in swamps, lakes and rivers.
In the pie chart, part D represents 97%. Thus, part D only represents the amount of Earth's water located in the oceans.
increases to 100 times the original concentration
decreases to 1/100 of the original concentration
decreases to 1/2 of the original concentration
Answers
Answer: The correct answer is 'increases to 100 times the original concentration'.
Explanation:
let the initial pH be x
The original concentration of initially present be y
...(1)
Final concentration of when pH reduced by 2 be z
...(2)
Putting the value of 'x' from (1) into (2) we get :
When pH of a solution decreases by 2.0, hydronium ion concentration of the solution increases to 100 times the original concentration
Answer:
B, is the answer
Answers
In periodic table, oxygen has a mass number of 16 and 8 electrons
In order to get neutrons, we just need to subtract 16 with 8 , and we get 8 neutrons
hope this helps
D. 8 protons, 8 neutrons, 8 electrons