Answer:
m = 1538.5 g
Explanation:
To answer this question, use the equation for specific heat:
Where q is the total heat energy, m is the mass, c is the specific heat of the substance (in this case water), and delta T is the temperature change.
You will be expected to know the specific heat of water, which is 4.186 J/g/C. Using the information in the question:
The final answer, 1538.5 g, is closest.
Answer:
20.5 × 10²³ molecules of He
Explanation:
Given data:
Number of moles of He = 3.40 mol
Number of molecules of He = ?
Solution:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
The number 6.022 × 10²³ is called Avogadro number.
For example,
18 g of water = 1 mole = 6.022 × 10²³ molecules of water
1.008 g of hydrogen = 1 mole = 6.022 × 10²³ atoms of hydrogen
For 3.40 moles of He:
3.40 mol × 6.022 × 10²³ molecules
20.5 × 10²³ molecules of He
Core, radiative zone, convective zone, photosphere, chromosphere, corona
30. mixture of compounds
31. compound
32. element
33. compound
34. compound
34. mixture of elements and compounds
