Answer: There are 
molecules in 63.00 g of 
Explanation:
According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number 
of particles.
To calculate the moles, we use the equation:
1 mole of contains = molecules
Thus 3.5 moles of contains = 
molecules.
There are molecules in 63.00 g of
No, sex cells are always sex cells
Answer:
4.87 g
Explanation:
The formula between the number of moles, mass and Mr can be used to find the mass of barium.
<em>Number of moles = mass ÷ Mr</em>
So, mass = number of moles × Mr
Mr of Ba = 137.3
∴ Mass = (3.55 × 10⁻²) × 137.3 = 4.87 g
Adding heat to a system can encourage or increases a chemical reaction.
<h3>Change that can encourage a reaction</h3>
Increasing the temperature of a process, increase occurs in the average speed of the reactant molecules and we know that when more molecules move faster, the more number of molecules reacts with other molecules which results in faster formation of products.
In conclusion, adding heat is the right option.
Learn more about reaction here: brainly.com/question/26018275
Answer: 438 K
Explanation:
According to Gibbs equation:
= Gibb's free energy change
= enthalpy change = 20.1 kJ/mol = 20100 J/mol
T = temperature
= entropy change = 45.9 J/Kmol
A reaction is at equilibrium when = Gibb's free energy change is zero and becomes spontaneous when = Gibb's free energy change is negative.
T=437.9K
Thus the temperature at which the reaction change from nonspontaneous to spontaneous in the forward direction is 438 K
