Answer:
As specific gravity is defined as weight per unit volume,so urine is the less dense fluid,so urine will be in hyperosmotic category.
Answer: There are 8 protons in oxygen-18 and 36 neutrons in copper-65.
Explanation:
An atom contains three sub-atomic particles, that is, protons, neutrons and electrons.
The atomic number is the total number of protons present in an atom. For oxygen-18, the atomic mass is 18.
Atomic mass is the sum of total number of protons and electrons present in an atom. As the atomic number of an oxygen atom is 8 so the number of protons present in oxygen-18 is 8.
The atomic mass of copper is 65 and for a copper atom, the atomic number is 29. Hence, the number of neutrons for copper-65 is as follows.
Atomic mass = no. of protons + no. of neutrons
65 = 29 + no. of neutrons
no. of neutrons = 65 - 29 = 36
Thus, we can conclude that there are 8 protons in oxygen-18 and 36 neutrons in copper-65.
Before the occurance of Fossil fuel, our energy needs were modest. For heat, we relied on the sun—and burned wood, straw, and dried dung For transportation, the muscle of horses and the power of the wind in our sails took us to every corner of the world.
<h3>What is Fossil Fuel ?</h3>
Fossil fuels are made from decomposing plants and animals.
These fuels are found in the Earth's crust and contain carbon and hydrogen, which can be burned for energy.
Coal, oil, and natural gas are examples of fossil fuels.
Hence, Before the occurance of Fossil fuel, our energy needs were modest. For heat, we relied on the sun—and burned wood, straw, and dried dung For transportation, the muscle of horses and the power of the wind in our sails took us to every corner of the world.
Learn more about Fossil fuel here ;
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Answer:
12.5 mL of HCl
Explanation:
The balanced chemical equation for the neutralization reaction is as follows
NaOH + HCl —> NaCl + H2O
Molar ratio of NaOH to HCl is 1:1
For neutralization to happen the number of NaOH moles is equal to the number of HCl moles
Number of NaOH moles reacted - 0.20 mol/L x 0.025 L = 0.005 mol
Therefore number of HCl moles reacted - 0.005 mol
Concentration of HCl is 0.40 mol/L
Concentration = number of moles / volume
Rearranging the equation
Volume = number of moles / concentration
Volume = 0.005 mol / 0.40 mol/L
= 0.0125 L
Volume of HCl added is 12.5 mL
