Answer:
6.28 L
Explanation:
Given data:
Volume of NO₂ = ?
Mass of NO₂ = 12.9 g
Temperature and pressure = ?
Solution:
First of all we will calculate the number of moles of gas.
Number of moles = mass/molar mass
Number of moles = 12.9 g/ 46 g/mol
Number of moles = 0.28 mol
At standard temperature and pressure 1 mole of gas occupy 22.4 L volume.
Thus,
0.28 mol × 22.4 L/1 mol
6.27 L ≅ 6.28 L
Answer:
1st one: carbon dioxide
2nd: Glucose
3rd: Oxygen
4th: Energy
Sorry if this is wrong because I don't see the options!
Hope this helps!
Hello!
The chemical reaction for the dissociation of Formic Acid is the following:
HCOOH + H₂O ⇄ HCOO⁻ + H₃O⁺
From this reaction we can use the Henderson-Hasselbach equation to find the pH, but first we need to find the value for the pKa:
pKa=-log(Ka)=3,75
pH=pKa + log([HCOO⁻]/[HCOOH])
pH=3,75 + log (0,295/0,205)
pH= 3,90
Have a nice day!
Elements 3 to 10 (Li to Ne) show a more or less steady increase in ionization energy.
<h3>What is ionisation energy?</h3>
The amount of energy required to remove an electron from an isolated atom or molecule.
The major difference is the increasing number of protons in the nucleus as you go from lithium to neon. That causes greater attraction between the nucleus and the electrons and so increases the ionization energies. In fact the increasing nuclear charge also drags the outer electrons in closer to the nucleus.
Learn more about the ionisation energy here:
brainly.com/question/20658080
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