Optrion A: when trying to determine a star's chemical composition.
Because unique atomic emission spectrum, analyzing the emission spectrum you can tell the chemical composition.
Answer:
5.46 M
Explanation:
First, we need to know the molar mass of the citric acid, the molar masses of the elements are:
H = 1 g/mol
C = 12 g/mol
O = 16 g/mol
So the molar mass of the acid is: 8x1 + 6x12 + 7x16 = 192 g/mol
The mass of the acid is the number of moles multiplied by the molar mass, so:
m = 0.688x192 = 132.096 g
Then, the volume is the mass divided by the concentration:
V = 132.096/1.049 = 125.926 mL = 0.1259 L
So, the molar concentration is the number of moles divided by the volume in liters:
M = 0.688/0.1259
M = 5.46 M
Answer:
4.79x10¹³s⁻¹
Explanation:
For a first order reaction, the graph of ln k against 1/K follows Arrhenius equation:
lnK = ln A - Ea/RT
<em>Where A is pre-exponential factor, Ea is activation energy, R gas constant and T is absolute temperature</em>
<em />
If you graph ln k = y and 1/T = x:
y = lnA - Ea/R x
<em>Where the slope = -Ea/R</em>
<em>And the intercept = lnA</em>
<em />
To solve the pre-exponential factor:
31.5 = lnA
e^31.5 =
<h3>4.79x10¹³s⁻¹</h3>
s⁻¹ because the reaction is first order.
Not sure but i think c Particles that struck the edges.
My best guess
LiCl is the answer to your question. Explanation: The rest are chemistry formulas added together. For example, Li3Al is a <span> lyonsite molybdate. This means that it is combined with something else. Hope this helps, ask me if you have any more questions!
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