An isotope is an element with a different number of neutrons than protons. Neutrons have mass and therfore elements can have different masses while being the same element.
Answer:
V = 122.2 L
Explanation:
Given data:
Number of molecules of water = 6.58×10²⁴
Volume of oxygen produced = ?
Solution:
Chemical equation:
2H₂O → 2H₂ + O₂
<em>Number of moles of water:</em>
Number of moles = 6.58×10²⁴/ 6.022 ×10²³
Number of moles = 1.09 ×10¹ mol
Number of moles = 10.9 mol
Now we will compare the moles of water with oxygen:
H₂O : O₂
2 : 1
10.9 : 1/2×10.9 = 5.45 mol
Volume of oxygen:
PV = nRT
V = nRT/P
V = 5.45 mol × 0.0821 L. atm. K⁻¹. mol⁻¹× 273 k / 1 atm
V = 122.2 L. atm. / 1 atm
V = 122.2 L
Answer:
16mL
Explanation:
Using the following formula;
CaVa = CbVb
Where;
Where
Ca = concentration/molarity of acid (M)
Va = volume of acid (mL)
Cb = concentration/molarity of base (M)
Vb = volume of base (mL)
According to the information provided in this question;
Ca (HCl) = 2M
Cb (NaOH) = 5M
Va (HCl) = 40mL
Vb (NaOH) = ?
Using CaVa = CbVb
Vb = CaVa/Cb
Vb = 2 × 40/5
Vb = 80/5
Vb = 16mL
This question would be easier to answer if you attached a picture of the graph the question is referring to.
