How do I know that all matter is made of atoms
Answers
Answer:
Simple Daltons atomic theroy and Through chemical reactions we can witness their effects. Through mathematical equations combined with indirect observations, we can calculate their various sizes. And finally, with the aid of new technologies such as the Scanning Tunnelling Microscope, atoms can now be seen.
Explanation:
The first accurate theory explaining the nature of matter was Dalton's Atomic Theory: 1. All matter is composed of atoms, and atoms are indivisible and indestructible. Elements are composed of identical atoms, but the atoms of each element are different and distinguishable from each other.(Look up Daltons atomic theroy)
Related Questions
The respiratory system takes oxygen into the human body and expels carbon dioxide. Which body system interacts with the respiratory system to transport these gases to and from the various parts of the body?A. the nervous system B. the digestive system C. the urinary system D. the circulatory system
Which of the following is an example of improved functioning as related to the benefits of muscular strength and endurance training?a. having stronger bonesb. easier to do household choresc. lower blood pressured. larger lung capacity
Muscles perform what type of energy transformation?
A 2.00 g sample of ammonia is mixed with 4.00 g of oxygen. Which is thelimiting reactant and how much excess reactant remains after the reactionhas stopped?
Answers
-photosynthesis
-exercise
-heterotrophs
-cellular Respiration
Answers
Answer:
cellular respiration
Explanation:
Organisms ingest large molecules, like carbohydrates, proteins, and fats, and convert them into smaller molecules like carbon dioxide and water. This process is called cellular respiration, a form of catabolism, and makes energy available for the cell to use.
Answers
Answer : The concentration of solution is, 0.45 M
Solution :
The given balanced reaction is,
The moles ratio of and
is, 1 : 1 that means 1 mole of HCl neutralizes by the 1 mole of ammonia.
According to the neutralization law,
where,
= molarity or concentration of
solution = ?
= volume of
solution = 25 ml
= molarity of concentration HCl solution = 0.25 M
= volume of HCl solution = 45 ml
Now put all the given values in the above law, we get the concentration of solution.
Therefore, the concentration of solution is, 0.45 M
no. of mol of hcl = vol. (L) x molarity = 0.045 × 0.25 = 0.01125mol
ratio of hcl:nh3 after balancing eqn = 1:1
no. of mol of nh3 that is completely neutralised by hcl = 0.01125 × 1 = 0.01125mol
therefore, concentration of nh3 = mol / total volume (L) = 0.01125mol / 0.025L= 0.45M
Answers
Answer:
Bohr thought that electrons orbited the nucleus in quantised orbits. ... In Rutherford's model most of the atom's mass is concentrated into the centre (what we now call the nucleus) and electrons surround the positive mass in something like a cloud. Bohr's most significant contribution was the quantisation of the model.
Explanation:
Answers
Answer:
3,5-dimethyl-2-octene
Explanation:
The parent chain will be choosen based on the highest value. In this case, if we count from top to bottom, we'll get seven carbon, however if we count from the second carbon, going left and then down, we'll get eight carbon. So the parent chain is octene
The double bond is located at the second carbon and the methyl groups are located on carbon 3 & 5. Since there are two methyl groups, we add di- in front of methyl to indicate two methyl groups present.
Note: The functional group has to be prioritise and it needed to be a part of the parent chain. In this case, the functional group is the double bond. (alkene)
Final answer:
The compounds are named as 2-ethyl-4-methylheptene, 3,5-dimethyl-2-octene, 2-ethyl-4-methylheptane and 3-methyl-5-propyl-2-hexene based on the IUPAC nomenclature rules for organic compounds.
Explanation:
The compounds presented in your question are named based on the rules of the International Union of Pure and Applied Chemistry (IUPAC), which are used for organic compounds. Here are their names:
- 2-ethyl-4-methylheptene - This is a heptene with methyl and ethyl groups on the 2nd and 4th carbon atoms.
- 3,5-dimethyl-2-octene - This is an octene with two methyl groups on the 3rd and 5th carbon atoms.
- 2-ethyl-4-methylheptane - This is a heptane with ethyl and methyl groups on the 2nd and 4th carbon atoms.
- 3-methyl-5-propyl-2-hexene - This is a hexene with a methyl group on the 3rd carbon atom and a propyl group on the 5th carbon atom.
Learn more about Organic Compounds here:
#SPJ2
Answers
Answer:54.36 K (−218.79 °C; −361.82 °F)
Explanation: