A developing country (or a low and middle income country (LMIC), less developed country, less economically developed country (LEDC), or underdeveloped country) is a country with a less developed industrial base and a low Human Development Index (HDI) relative to other countries.
Answer:
LOD = 0,0177
LOQ = 0,0345
Explanation:
Detection limit (LOD) is defined as the lowest signal which, with a stated probability, can be distinguished from a suitable blank signal. In the same way, quantification limit (LOQ) is defined as the lowest analyte concentration that can be quantitatively detected with a stated accuracy and precision.
There are many formulas but the most used are:
LOD = X + 3σ
LOQ = X + 10σ
Where X is average and σ is standard desvation
For the blanks readings the average X is 0,0105 and σ is 0,0024
Thus:
<em>LOD = 0,0177</em>
<em>LOQ = 0,0345</em>
I hope it helps!
Answer:
1.36moles
Explanation:
Given parameters:
Pressure of gas = 1.2atm
Volume of gas = 21liters
Temperature of gas = 145°C, in Kelvin gives 273 + 145 = 418K
Unknown:
Number of moles of the gas = ?
Solution:
To solve this problem, we are going to use the ideal gas equation which combines the three gas laws; Boyle's law, Charles's law and Avogadro's law.
Mathematically, it is given as;
PV = nRT
where;
P is the pressure of gas
V is the volume of gas
n is the number of moles
R is the gas constant = 0.082
T is the temperature
Substitute the values and solve for n;
1.2 x 21 = n x 0.082 x 418
solving for n;
n = 1.36moles
The force of gravity on the 1 kg box is 2 N.
The formula for the force of gravity <em>F</em> on an object with mass <em>m</em> is
<em>F</em> = (<em>GmM</em>)/<em>d</em>²
Since <em>G</em>, <em>M</em> , and <em>d</em> are the same for both objects, (<em>GM</em>)/<em>d</em>² = a constant = <em>k
</em>). Then, we can write
<em>F = km
</em>
<em>F</em>₂/<em>F</em>₁ = <em>m</em>₂/<em>m</em>₁
<em>F</em>₂ = <em>F</em>₁ × <em>m</em>₂/<em>m</em>₁
If the 2.5 kg box is object 1,
<em>F</em>₂= 6.1 N × (1 kg/2.5 kg) = 2 N
<em>Note</em>: The answer can have <em>only one significant figure</em> because that is all you gave for the mass of the 1 kg object.
