Basically, they just allow us to see farther into space, therefore letting us see in closer detail what objects in space are made of, such as flaming balls of gas (stars).
Answer:
Well in one glucose they are 6.022*1023 individual glucose molecule.
STP is abbreviation for Standard Temperature and Pressure at which the temperature is 273 K and pressure is 1 atm
- At these conditions the molar volume is equal to 22.4 L
so 1 mole of SO₂ volume = 22.4 L
? mole of SO₂ volume = 2.5 L
number of moles = 2.5 / 22.4 = 0.1116 mol
mass of SO₂ = 0.1116 * 64.063 = 7.15 g
Emission spectrum is the spectrum of frequencies of electromagnetic radiation which are emitted due to an atom or molecule making a transition from a high energy state to a lower energy state.
So, the appearance of lines in an emission spectrum is caused by :
Light is released as an electron moves to a lower energy state.
Answer:
Yield of CO₂ = 79.1 %
Explanation:
This is the balanced reaction:
CaCO₃ (s) + 2HCl (aq) → CO₂ (g) + CaCl₂ (aq) + H₂O (l)
As the hydrochloric acid is in excess, the limiting reactant is the CaCO₃.
Let's convert the mass to moles
10.9 g / 100.08 g/mol = 0.109 moles
Ratio is 1:1, so 0.109 moles of CaCO₃ will produce the same amount of CO₂.
Let's determine the mass
0.109 moles of CO₂ . 44 g/mol = 4.79 g
Now, we can determine the yield
(yeild produced / theoretical yield) . 100 =
(3.79 / 4.79) . 100 = 79.1%
