An atom of which element has the strongest attraction for electrons? A) Ba
B) Cs
C) O
D) F
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50 POINTS Which of the following is a synthesis reaction? 2H2O yields 2H2 + O2 H2 + Cl2 yields 2HCl 2Li + CaO yields Li2O + Ca CH4 + 2O2 yields CO2 + 2H2O
A scientists claimed that he had cloned a guinea pig to produce two offspring, a male and a female. The claim is not valid because
In nature, rings with ____ carbon atoms are the most abundant
The only way to seperate a compound into its elements is by a
alkaline earth metal.
halogen.
inner transition metal.
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Atoms of different element can not have same atomic number because only same type of atoms combine to form element. Atoms belonging to different element can have different atomic number. Therefore, chlorine belongs to halogen family.
What is element?
Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same. Two or more than two atoms with different physical or chemical properties can not combine together to form an element.
Chlorine is a Halogen. These are all elements in Group 17 (right next to the Nobel Gases). Atomic number of chlorine is 17. Chlorine needs only one electron to completes its octet. Chlorine exist as gas.
Therefore, chlorine belongs to halogen family.
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A white solid is flammable and dissolves in hexane. It should be organic molecule.
What is organic molecule.?
Any chemical substance that has carbon-hydrogen, as well as carbon-carbon bonds is considered an organic molecule.
What is flammable?
The term "flammable substances" refers to those gases, liquids, as well as solids that, when exposed to an ignition source, would catch fire and keep burning in the air. Many flammable and explosive substances have a volatile character, which means they rapidly evaporate and continuously emit vapors.
A chemical characteristic, like corrosion resistance, was flammability. A material's physical characteristics, including its hardness, density, melting point, and thermal conductivity, can be measured or observed without using force or chemical alterations. A material's phase changes when it melts, not just its identity.
There are some properties of organic molecules.
- An abundance of carbon.
- Saturation in organic solvents.
- Covalent bonds form
- A low boiling as well as melting point.
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Answer:
The answer to your question is CH₄ + 2O₂ ⇒ CO₂ + 2H₂O
Explanation:
Data
Methane = CH₄
Oxygen = O₂
Process
A combustion reaction is a kind of chemical reaction in which an organic compound reacts with oxygen to generate water and carbon dioxide.
Chemical reaction
CH₄ + O₂ ⇒ CO₂ + H₂O
Reactants Elements Products
1 C 1
4 H 2
2 O 3
Balanced chemical reaction
CH₄ + 2O₂ ⇒ CO₂ + 2H₂O
Reactants Elements Products
1 C 1
4 H 4
4 O 4
Final answer:
The balanced chemical equation for the combustion of methane is CH4 + 2O2 -> CO2 + 2H2O. This equation shows that a methane molecule reacts with two oxygen molecules to produce a carbon dioxide molecule and two water molecules while maintaining a balance as per the Law of Conservation of Mass.
Explanation:
The combustion of methane occurs when methane gas (CH4) combines with oxygen (O2) to produce carbon dioxide (CO2) and water (H2O). This reaction can be represented by the following balanced chemical equation:
CH4 + 2O2 -> CO2 + 2H2O
This means that one molecule of methane reacts with 2 molecules of oxygen to produce one molecule of carbon dioxide and two molecules of water. The chemical equation is balanced, meaning that the number of atoms of each element is the same on both sides of the equation as required by the Law of Conservation of Mass.
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B. Reflection
C. Diffraction
D. Resonance
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Answer:
Explanation:
A chemical change, as the name suggests, must result from a change in the chemical makeup and new substances are produced. A very common example is metal rusting.
A physical change can be observed without a change in chemical composition. No new substances are produces. Ripping paper and an ice cube melting are physical changes.
A rubber band stretching is a physical change. No new substances are made and the chemical makeup remains the same.
Answer:
physical
Explanation:
this is a physical action to create a change. does not involve chemicals or elements
Answers
Given:
Molar Mass HBr = 80.904g/mol
Density solution = 1.24 g/mL
27.7%(wt/wt) HBr
Total mass of solution = volume(density) = 100mL (1.24 g/mL) = 124 g solution
Mass HBr in solution = 124g(0.277) = 34.348 g HBr
Moles HBr in solution = 34.348/80.904 = 0.4246 moles HBr
Molarity = moles solute/L solution = 0.4246 moles HBr/0.1 L solution
Molarity = 4.246 M