Which atomic model proposed that electrons move in specific orbits around the nucleus of an atom
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Answer 1
Answer:
The atomic model that proposed that electrons move in specific orbits around the nucleus of an atom is the Bohr model, or the Rutheford-Bohr model, envisioned by Niels Bohr in 1913.
Benedict's solution, deep-blue alkaline solution used to test for the presence of the aldehyde functional group, - CHO. The substance to be tested is heated with Benedict's solution; formation of a brick-red precipitate indicates presence of the aldehyde group. Since simple sugars (e.g., glucose) give a positive test, the solution is used to test for the presence of glucose in urine, a symptom of diabetes. One liter of Benedict's solution contains 173 grams sodium citrate, 100 grams sodium carbonate, and 17.3 grams cupric sulfate pentahydrate. It reacts chemically like Fehling's solution; the cupric ion (complexed with citrate ions) is reduced to cuprous ion by the aldehyde group (which is oxidized), and precipitates as cuprous oxide, Cu2O
How do isotopes of a given element differ? How am they similar?
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Isotopes of a given element differ from one another based on the number of neutrons those atoms of the same element have. They are similar as they are the same element, given to us as they all have the same atomic number, but different in the number of neutrons they possess, which ultimately affects the atomic mass or mass number of that said isotope.
The state of matter that is able to be compressed is gas
liquid
solid
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Gases are easily compressible
The answer would be gas.
What is the answer to this question?
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I think it's 4 but I am not even 50% sure... But I think that is the answer..
The cube has a mass of 72.9 g.What is its density in g/cm3?
What substance is it?
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If the cube is 3 cm on each side, then it has a volume of 27 cm^3 (3 x 3 x 3). Density is mass divided by volume, so its density is 72.9/27 = 2.7 g/cm^3.
Going by the density, the cube is made of Aluminium - density is a fairly unique quantity
Answer: aluminum and 2.7
Explanation:
2 How many molecules of water are there in 1g of water CH₂)
Answers
Answer:
3.3345 x 10^22
The molar mass of the water molecule is 18 g/mol. It implies that 1 mol of water molecules weigh 18 g.
Now you can calculate easily the number of water molecules present in 1 g of water. Calculation follows
18 g of water contains 1 mol of water molecules.
or 18 g of water contains 6.022 x 10^23 water molecules.
or 1 g of water contains (6.022 x 10^23)/ 18 water molecules and the number comes out to be 3.3455 x 10^22.
So the number of water molecules present in 1 g of water is 3.3455 x 10^22.