The number of neutrons present : 11
<h3>Further explanation</h3>
Given
²¹Ne
Required
Number of neutrons
Solution
In the following element notation,
X = symbol of element
A = mass number
= number of protons + number of neutrons
Z = atomic number
= number of protons = number of electrons, on neutral elements
So the symbol above shows the mass number Ne: 21
Ne itself has an atomic number of 10, so the number of neutrons :
number of neutrons = mass number - atomic number
number of neutrons = 21 - 10
number of neutrons = 11
Answer:
5.46 8 x 10²³ molecules.
Explanation:
- <em>Knowing that every one mole of a substance contains Avogadro's no. of molecules (NA = 6.022 x 10²³).</em>
<em><u>Using cross multiplication:</u></em>
1.0 mole → 6.022 x 10²³ molecules.
9.08 x 10⁻¹ mole → ??? molecules.
∴ The no. of molecules of CO₂ are in 9.08 x 10⁻¹ mol = (6.022 x 10²³ molecules) ( 9.08 x 10⁻¹ mole) / (1.0 mol) = 5.46 8 x 10²³ molecules.
10.) id go for a more comfortable seat then a uncomfortable seat because i dont want to b uncomfortable riding my bike but if u like to stand when u ride a bike than a uncomfotable seat cuz u wouldnt have to seat on it that much since u stand when u ride a bike
Answer:
<h2>
C)Four times</h2>
Explanation:
<h3>Because kinetic energy is proportional to the square of the velocity, when velocity is doubled, kinetic energy is quadrupled.</h3>