Answer:
45 joules to calories= 10 (10.755258) calories
Answer:
Model 1 represents the old geocentric model of the solar system and Model 2 represents the newer heliocentric model of the solar system.
Explanation:
Model 1 has earth in the center, therefore it is geocentric. the geocentric model of the solar system is old. Nobody believes in it anymore because it is scientifically inaccurate.
Model 2 has the sun in the center, therefore it is heliocentric. This is the newer model of the solar system.
Answer: an organic base, a phosphate group, and a sugar
Explanation:
A nucleotide is made up of 3 parts. We know a nucleotide is not made up of water so we are left with 2 choices. Nucleotides are made up of phosphate group, 5-carbon sugar, and nitrogenous base. The nitrogeneous base is typically adenine. The answer choice that matches this the closest is an organic base, a phosphate group, and a sugar.
The organic base is the nitrogeneous base and the sugar is the 5-carbon sugar.
I hope I am right on this, but the answer is
Fe₂O₃ + 3CO --> 2Fe + 3CO₃
Answer:
Explanation:
In recrystallization it is important that the solute dissolve in the solvent at higher temperature and the solute should be insoluble in the solvent at lower temperature. It is also important that the impurities dissolves in the solvent at normal room temperature. This is the principle of recrystallization.
The likely identity of the impurities is that it has high solubility in the solvent at lower temperature.
It is necessary to heat the potassium oxalate solution because potassium oxalate will only be soluble in the solvent at higher temperature. Increase in temperature increases solubility.
Placing the solution in an ice bath will make the solution to cool. On cooling sodium oxalate will recrystallize in a purer solid because it is insoluble in the solvent at low temperature leaving behind the impurities in the solution.
