Answer:
2.173 moles of ethanol is presented in a 100.0g sample of ethanol .
Explanation:
The amount of substance that contains as many Particles as there are atoms in exactly 12g of carbon- '12 isotope is called 1 mole '= 46 u.
Acid A, assuming the two acids have the same pH. The M stands for molarity which is how concentrated a substance is (basically the higher the molarity the more concentrated the acid is). However, pH refers to how acidic a substance is. If the two acids have different levels of acidity, the answer may be different.
Answer:
C. naturally uncombined with other elements.
Explanation: Calcium is a chemical element with the symbol Ca and atomic number 20. As an alkaline earth metal, calcium is a reactive metal that forms a dark oxide-nitride layer when exposed to air.
In this question, we have to use 3 equations.
E = mcΔT, E = mlf and E = mlv
E is the energy required (in joules), m is the mass, c is the specific heat capacity of water, ΔT is the change in temperature, lf is the specific latent heat of fusion, and lv is the specific latent heat of vaporization.
Since this question requires the change in temperature during the water state, so the first equation is used, and last 2 equations are for finding the energy required to change state (from ice to water and from water to vapor) (in their mp and bp).
For the specific latent heat and heat capacity, generally they should be given for the question, but we can also look it up online since each substance has their own value.
So the first step is to find the amount of energy needed to convert ice at 0°C to water at 0°C. We can use the second equation. The specific latent heat of fusion of ice is around 334 J kg^-1
E = mlf
E = 5 x 334
E = 1670 J
Next, we have to find the energy required to heat water at 0°C to 100°C. The specific heat capacity of water is around 4.2 J g^-1 °C^-1.
E = mcΔT
E = 5 x 4.2 x (100-0)
E = 2100 J
Then we have to find the amount of heat required to change water at 100°C to water vapor at 100°C. The specific latent heat of vaporization of water is around 2230 J g^-1.
E = mlv
E = 5 x 2230
E = 11150 J
Therefore, to find the final answer, just add up the 3 values for the total energy required.
1670 + 2100 + 11150
= 14920 J
Your final answer should be 14920 joules.
A good example of intrusive igneous rock is granite<span> . Extrusive igneous rocks form when the </span>magma<span> or molten rock pours out onto the earth's surface or erupts at the earth's surface from a volcano . Extrusive rocks are also called volcanic rocks.</span>Basalt<span> , formed from hardened </span>lava<span> , is the most common extrusive rock</span>
