If the mass of a material is 111 grams and the volume of the material is 25 cm3, what would the density of the material be? g/cm3
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Which definitions of acids can apply to substances?
A student wants to make an electromagnet. Which items are needed?magnet copper wire copper wire, metal nail, battery magnet, copper wire, metal nail battery, heat source, copper wire
Which formulas represent compounds that are isomers of each other?H HH-C-H and H C-HH H2 HO-C-H and H C-OHH HH-C-C-C OH and H-C O-C-C-HH HH H HOH HH OH H4 H-C-C-C-H and H C C-HH H
what is the molarity of a concentrated hbr solution if the solution is 27.7% hbr by mass and has a density of 1.24 g/ml
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Answer;
Considering the attached image;
The correct answer is D.
Explanation;
-An element is a substance that can not be broken down into simpler substances by ordinary chemical means. Example, iron, gold, hydrogen , carbon, oxygen , etc.
-Elements are made of atoms. An atom is the smallest particle of an element that can take part in a chemical reaction. Atoms of different elements are different. Atoms of one element are basically alike.
In the diagram, there are only one type of element depicted.
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Silicon (Si) has 4 valence electrons, and sulfur (S) has 6 valence electrons each. Since there are two sulfur atoms in SiS2, that's a total of 2 x 6 = 12 valence electrons from sulfur.
Now, add the valence electrons from silicon and sulfur:
4 (Si) + 12 (S) = 16 valence electrons in total.
In a covalent compound like silicon disulfide, all the valence electrons are involved in bonding, either in forming bonds (shared electrons) or as non-bonding pairs.
Since SiS2 forms two covalent bonds (Si-S-Si), each involving two electrons, there are 4 electrons used for bonding (2 pairs of bonding electrons). Therefore, the remaining 16 - 4 = 12 electrons are non-bonding pairs.
So, there are 12 pairs of non-bonding electrons in a silicon disulfide (SiS2) molecule.
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Answer:
The theoretical yield of copper is 79.6281 g
Explanation:
Moles of copper sulfate =
According to reaction 1 mol of copper sulfate gives 1 mol of copper .
Then 1.2530 mol of copper sulfate will gives :
of copper .
Mass of 1.2530 mol of copper :
1.2530 mol × 63.55 g/mol = 79.6281 g
The theoretical yield of copper is 79.6281 g
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Explanation:
Most of the carbon compound are convalent in nature and all of the electrons participates in bond formation as such there is no free electrons left to conduct electricity. Moreover carbon compound doesn't readily dissociates to form ions, which conduct electricity. Hence carbon compound are poor conductor of electricity.
Answer:
It is because all the valence electrons are used to form covalent bonds. So, there will be no electrons left to flow the electric current through them.
Explanation:
hope it helps
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A form of electricity which can attract things is static electricity. Static electricity is the result of an imbalance between negative and positive charges in an object. These charges built up o the surface of an object until they find a way to e released or discharged causing the attraction of things.
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Every organic molecules/compound contains carbon (c).
Some other very abundant are hydrogen, nitrogen, oxygen, phosphorus, and sulfur.
I learned this with the acronym CHNOPS.
C - Carbon
H - Hydrogen
N - Nitrogen
O - Oxygen
P - Phosphorus
S - Sulfur
Hope this helps!
Answer: The elements which are common for all organic molecules is hydrogen and carbon.
Explanation:
Another name for organic molecules are hydrocarbons. This means that the molecules which consist of hydrogen and carbon atoms is an organic compound.
For Example:
are not organic compounds, because in water, carbon is not there and in carbon dioxide, hydrogen is not there. But,
is an organic compound because hydrogen and carbon both are present.
Hence, hydrogen and carbon elements are common to all organic molecules.