Answer:
Extensive properties depend on de mass, intensive properties not.
Explanation:
The extensive properties depend on the mass and change with the addition or reducction of the mass.
The intensive properties dont depend on the mass. For example: temperature.
I hope I help you.
Answer:
yes
Explanation:
Alchemy is best described as a form of 'proto-science' rather than a distinct science in its own right. This is because, although many observations and theories made by alchemists were based on scientific fact, they often explained these in terms of 'magic' or divine intervention.
Answer:
The number of molecules= 1.33 × 10∧22 molecules
percentage of mercury = 87%
Explanation:
Given data:
mass of dimethyl mercury = 5.10 g
number molecules of dimethyl mercury in 5.10 g = ?
percentage of mercury = ?
Solution:
First of all we will calculate the molar mass of dimethyl mercury.
molar mass of HgC2H6 = 1×200.6 + 2×12 + 6×1 = 230.6 g/mol
we know that,
230.6 g of HgC2H6 = 1 mol = 6.02 × 10∧23 molecules.
so
For the 5.10 g of sample:
5.10 g/230 g/mol = 0.022 moles of HgC2H6
now we will multiply these number of moles with Avogadro number to get number of molecules in 5.10 g of sample.
0.022 × 6.02 × 10∧23 molecules = 0.133 × 10∧23 molecules or
1.33 × 10∧22 molecules.
Percentage of mercury:
Formula:
percentage = (atomic number of Hg × total number of atoms of Hg/ molar mass of HgC2H6) × 100
% age of Hg = (200.6 g/mol× 1/ 230.6 g/mol) × 100
%age of Hg = 0.869 × 100
%age of Hg = 86.99 % or 87 %
General Remark
The amount of energy transferred from the sun to the wood and steel is determined by m*c*deltaT. [So far, you really only have 2 choices for heat energy transfer. One is the one you are using m*c*deltaT and the other one is Mass * heat. This latter is for phase changes].
Solution
What causes the temperature to be higher in one part of the sample than on the other part? If they both receive the same amount of heat (as in getting their energy from the sun) then why does one deltaT exceed the other? Look around at the parts of the formula. That's very important in science. The mass (m) is not going to affect the different temperatures. The mass is the same in both cases.
It won't be deltaT either. DeltaT has already done it's job. It's recorded that there is a temperature difference. Steel has a larger deltaT than the wood.
What's left?
It must be the c. What are the units on c? If you check it out it is joules / (oC * grams) or something that means grams and deltaT. So c must be lower than steel than for wood. Why? Because it takes less energy to heat up the steel. Small c means large deltaT if the temperature is greater in the iron.
Answers
<em><u>Blank One </u></em>absorbed more energy from. c is small.
<em><u>Blank Two</u></em> Less than.
This is an extremely important question to get a handle on. More and Less are very important key words in Science.