Answer:
1.054 x 10²⁴ molecules
Explanation:
In order to convert moles <em>of any given substance</em> into a number of molecules, we need to use <em>Avogadro's number</em>, which states the number of molecules -or atoms, in the case of elements- present in one mol:
- In one mol there are 6.023x10²³ molecules.
We now <u>convert 1.75 moles into molecules</u>:
- 1.75 mol * 6.023x10²³ molecules/mol = 1.05x10²⁴ molecules
1. Heat always flow from a region of higher temperature
to a lower temperature, just like concentration gradient. So in this case,
since the metallic sphere is hotter than water, so naturally heat energy flows
from the metallic sphere to the water.
2. We use the formula:
Q = m C ∆T
where Q is the heat energy gained, m is mass of water, C
is heat capacity of water = 4.184 J/g°C and ΔT is change in temperature
Since density of water is 1 g/mL, so mass is also 100g,
therefore:
Q = 100 g * 4.184 J/g°C * (27.1°C - 25°C)
Q = 878.64 J
3. Heat gained by the water is equal to the heat lost by
the metal, therefore:
Q(water) = - Q(metal)
878.64 J = - 15 g * C * (27.1°C - 98°C)
C = 0.83 J/g°C
Answer:
Neon and Methane
Explanation:
Nitrogen and Oxygen made up way over half of the atmosphere so it's without a doubt, not those two. Precisely, Nitrogen makes up 78% of the atmosphere while oxygen makes up 21%
Answer:
1. 7.0984 mmHg
2. 7.0984 torr
Explanation:
Data obtained from the question include:
Partial Pressure of Ar = 0.00934 atm
1. The value of pressure in mmHg is obtained as shown below:
1 atm = 760mmHg
Therefore, 0.00934 atm = 0.00934 x 760 = 7.0984mmHg
2. The value of the pressure in torr is obtained as shown below:
1 atm = 760torr
Therefore, 0.00934 atm = 0.00934 x 760 = 7.0984torr
<span>Answer:
1/4 is the average bond order for a pâ’o bond (such as the one shown in blue) in a phosphate ion.</span>